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Reverse Osmosis Indonesia| Tap Water RO(TWRO) BRACKISH WATER RO(BWRO) Wattech WRO 4-H



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Reverse Osmosis Indonesia – RO Systems – WRO-4H Series

Reverse Osmosis Wattech WRO-4H

Reverse Osmosis Wattech

The WATTECH ‘WRO-4H’ Series Reverse Osmosis Indonesia system is designed for larger commercial and industrial applications requiring high purity water (98-99% salt rejection). Nominal output capacities of 10,800-28,800 GPD. Horizontally arranged membrane housings for maximum product output with minimal floor-space usage requirements. Skid mounted packages are available which Greatly reduce installation time and costs.

Designed for larger commercial and industrial applications requiring high purity water (98-99% salt rejection). Nominal output capacities of 10,800-28,800 GPD. Horizontally arranged membrane housings for maximum product output with the minimal smallest floor-space requirements.


  • High rejection, 4″ x 40″ thin-film composite (TFC) membrane elements in a spiral-wound configuration.
  • FRP membrane housings with PVC end-cap material (300 psig rating).
  • Stainless steel multi-stage feed pump with TEFC motor (230/460V, 3-Phase).
  • Epoxy –coated carbon steel skid/frame assembly.
  • Polypropylene pre-filter housing with 5.0-micron cartridge.
  • NEMA-4X system controller complete with operator lights and switches for simple operation. Includes pre-wired motor starter, low inlet pressure switch with alarm, and pre-treatment interlock.
  • Compact product water conductivity monitor with digital display.
  • Panel-mounted product, reject, and recycle visual flow rota-meters.
  • Panel-mounted stainless steel system pressure gauges and sampling valves.
  • PVC low pressure piping/valves and brass/stainless steel high pressure tubing and valves.
  • Automatic system inlet feed valve.
  • Automatic membrane flush cycle (after system shutdown).

Optional Equipment

  • Skid-Mount Packages – RO machines are available with the necessary pre-treatment and re-pressurization equipment mounted to a structural carbon steel skid and pre-piped/pre-wired to the fullest extent. Greatly reduces installation time and costs. Not available for 18,000-28,800 GPD models.
  • Clean-in-Place Packages – For periodic cleaning of the membrane elements to remove mineral scale and biological fouling. Includes a skid mounted and pre-wired transfer pump, batch solution tank, inlet filter housing, isolation valves, and quick disconnect cleaning ports. Recommended for 18,000-28,800 GPD models to maximize membrane life and significantly reduce operating costs.
  • Reverse Osmosis System The Best In Indonesia
  • Reverse Osmosis Indonesia


WATTTECH PT TIRTA SUMBER MAKMUR INDONESIA Industrial Water builds custom Reverse Osmosis systems designed specifically for your industrial water treatment needs.

understanding Reverse Osmosis

Reverse Osmosis, commonly referred to as RO, is a process where you demineralize or deionize water by pushing it under pressure through a semi-permeable Reverse Osmosis Membrane.


To understand the purpose and process of Reverse Osmosis you must first understand the naturally occurring process of Osmosis.

Osmosis is a naturally occurring phenomenon and one of the most important processes in nature. It is a process where a weaker saline solution will tend to migrate to a strong saline solution. Examples of osmosis are when plant roots absorb water from the soil and our kidneys absorb water from our blood.

Below is a diagram which shows how osmosis works. A solution that is less concentrated will have a natural tendency to migrate to a solution with a higher concentration. For example, if you had a container full of water with a low salt concentration and another container full of water with a high salt concentration and they were separated by a semi-permeable membrane, then the water with the lower salt concentration would begin to migrate towards the water container with the higher salt concentration.Osmosis Diagram

A semi-permeable membrane is a membrane that will allow some atoms or molecules to pass but not others. A simple example is a screen door. It allows air molecules to pass through but not pests or anything larger than the holes in the screen door. Another example is Gore-tex clothing fabric that contains an extremely thin plastic film into which billions of small pores have been cut. The pores are big enough to let water vapor through, but small enough to prevent liquid water from passing.

Reverse Osmosis is the process of Osmosis in reverse. Whereas Osmosis occurs naturally without energy required, to reverse the process of osmosis you need to apply energy to the more saline solution. A reverse osmosis membrane is a semi-permeable membrane that allows the passage of water molecules but not the majority of dissolved salts, organics, bacteria and pyrogens. However, you need to ‘push’ the water through the reverse osmosis membrane by applying pressure that is greater than the naturally occurring osmotic pressure in order to desalinate (demineralize or deionize) water in the process, allowing pure water through while holding back a majority of contaminants.

Below is a diagram outlining the process of Reverse Osmosis. When pressure is applied to the concentrated solution, the water molecules are forced through the semi-permeable membrane and the contaminants are not allowed through.
Reverse Osmosis Diagram

How does Reverse Osmosis work?

Reverse Osmosis works by using a high pressure pump to increase the pressure on the salt side of the RO and force the water across the semi-permeable RO membrane, leaving almost all (around 95% to 99%) of dissolved salts behind in the reject stream. The amount of pressure required depends on the salt concentration of the feed water. The more concentrated the feed water, the more pressure is required to overcome the osmotic pressure.

The desalinated water that is demineralized or deionized, is called permeate (or product) water. The water stream that carries the concentrated contaminants that did not pass through the RO membrane is called the reject (or concentrate) stream.RO Membrane Diagram

As the feed water enters the RO membrane under pressure (enough pressure to overcome osmotic pressure) the water molecules pass through the semi-permeable membrane and the salts and other contaminants are not allowed to pass and are discharged through the reject stream (also known as the concentrate or brine stream), which goes to drain or can be fed back into the feed water supply in some circumstances to be recycled through the RO system to save water. The water that makes it through the RO membrane is called permeate or product water and usually has around 95% to 99% of the dissolved salts removed from it.

It is important to understand that an RO system employs cross filtration rather than standard filtration where the contaminants are collected within the filter media. With cross filtration, the solution passes through the filter, or crosses the filter, with two outlets: the filtered water goes one way and the contaminated water goes another way. To avoid build up of contaminants, cross flow filtration allows water to sweep away contaminant build up and also allow enough turbulence to keep the membrane surface clean.

What will Reverse Osmosis remove from water?

Reverse Osmosis is capable of removing up to 99%+ of the dissolved salts (ions), particles, colloids, organics, bacteria and pyrogens from the feed water (although an RO system should not be relied upon to remove 100% of bacteria and viruses). An RO membrane rejects contaminants based on their size and charge. Any contaminant that has a molecular weight greater than 200 is likely rejected by a properly running RO system (for comparison a water molecule has a MW of 18). Likewise, the greater the ionic charge of the contaminant, the more likely it will be unable to pass through the RO membrane. For example, a sodium ion has only one charge (monovalent) and is not rejected by the RO membrane as well as calcium for example, which has two charges. Likewise, this is why an RO system does not remove gases such as CO2 very well because they are not highly ionized (charged) while in solution and have a very low molecular weight. Because an RO system does not remove gases, the permeate water can have a slightly lower than normal pH level depending on CO2 levels in the feed water as the CO2 is converted to carbonic acid.

Reverse Osmosis is very effective in treating brackish, surface and ground water for both large and small flows applications. Some examples of industries that use RO water include pharmaceutical, boiler feed water, food and beverage, metal finishing and semiconductor manufacturing to name a few.

Reverse Osmosis Performance & Design Calculations

There are a handful of calculations that are used to judge the performance of an RO system and also for design considerations. An RO system has instrumentation that displays quality, flow, pressure and sometimes other data like temperature or hours of operation. In order to accurately measure the performance of an RO system you need the following operation parameters at a minimum:

  1. Feed pressure
  2. Permeate pressure
  3. Concentrate pressure
  4. Feed conductivity
  5. Permeate conductivity
  6. Feed flow
  7. Permeate flow
  8. Temperature

Salt Rejection %

This equation tells you how effective the RO membranes are removing contaminants. It does not tell you how each individual membrane is performing, but rather how the system overall on average is performing. A well-designed RO system with properly functioning RO membranes will reject 95% to 99% of most feed water contaminants (that are of a certain size and charge). You can determine effective the RO membranes are removing contaminants by using the following equation:

Salt Rejection Calculation

The higher the salt rejection, the better the system is performing. A low salt rejection can mean that the membranes require cleaning or replacement.

Salt Passage %

This is simply the inverse of salt rejection described in the previous equation. This is the amount of salts expressed as a percentage that are passing through the RO system. The lower the salt passage, the better the system is performing. A high salt passage can mean that the membranes require cleaning or replacement.

Salt Passage Calculation

Recovery %

Percent Recovery is the amount of water that is being ‘recovered’ as good permeate water. Another way to think of Percent Recovery is the amount of water that is not sent to drain as concentrate, but rather collected as permeate or product water. The higher the recovery % means that you are sending less water to drain as concentrate and saving more permeate water. However, if the recovery % is too high for the RO design then it can lead to larger problems due to scaling and fouling. The % Recovery for an RO system is established with the help of design software taking into consideration numerous factors such as feed water chemistry and RO pre-treatment before the RO system. Therefore, the proper % Recovery at which an RO should operate at depends on what it was designed for. By calculating the % Recovery you can quickly determine if the system is operating outside of the intended design. The calculation for % Recovery is below:

Recovery Calculation

For example, if the recovery rate is 75% then this means that for every 100 gallons of feed water that enter the RO system, you are recovering 75 gallons as usable permeate water and 25 gallons are going to drain as concentrate. Industrial RO systems typically run anywhere from 50% to 85% recovery depending the feed water characteristics and other design considerations.↑

Concentration Factor

The concentration factor is related to the RO system recovery and is an important equation for RO system design. The more water you recover as permeate (the higher the % recovery), the more concentrated salts and contaminants you collect in the concentrate stream. This can lead to higher potential for scaling on the surface of the RO membrane when the concentration factor is too high for the system design and feed water composition.

Concentration Factor Calculation

The concept is no different than that of a boiler or cooling tower. They both have purified water exiting the system (steam) and end up leaving a concentrated solution behind. As the degree of concentration increases, the solubility limits may be exceeded and precipitate on the surface of the equipment as scale.

For example, if your feed flow is 100 gpm and your permeate flow is 75 gpm, then the recovery is (75/100) x 100 = 75%. To find the concentration factor, the formula would be 1 ÷ (1-75%) = 4.

A concentration factor of 4 means that the water going to the concentrate stream will be 4 times more concentrated than the feed water is. If the feed water in this example was 500 ppm, then the concentrate stream would be 500 x 4 = 2,000 ppm.↑


Flux (Gfd) Calculation

For example, you have the following:
The RO system is producing 75 gallons per minute (gpm) of permeate. You have 3 RO vessels and each vessel holds 6 RO membranes. Therefore you have a total of 3 x 6 = 18 membranes. The type of membrane you have in the RO system is a Dow Filmtec BW30-365. This type of RO membrane (or element) has 365 square feet of surface area.

To find the flux (Gfd):

Flux Calculation Example

The flux is 16 Gfd.

This means that 16 gallons of water is passed through each square foot of each RO membrane per day. This number could be good or bad depending on the type of feed water chemistry and system design. Below is a general rule of thumb for flux ranges for different source waters and can be better determined with the help of RO design software. If you had used Dow Filmtec LE-440i RO membranes in the above example, then the flux would have been 14. So it is important to factor in what type of membrane is used and to try and keep the type of membrane consistent throughout the system.

Feed Water Source Gfd
Sewage Effluent 5-10
Sea Water 8-12
Brackish Surface Water 10-14
Brackish Well Water 14-18
RO Permeate Water 20-30

Mass Balance

A Mass Balance equation is used to help determine if your flow and quality instrumentation is reading properly or requires calibration. If your instrumentation is not reading correctly, then the performance data trending that you are collecting is useless.

You will need to collect the following data from an RO system to perform a Mass Balance calculation:

  1. Feed Flow (gpm)
  2. Permeate Flow (gpm)
  3. Concentrate Flow (gpm)
  4. Feed Conductivity (µS)
  5. Permeate Conductivity (µS)
  6. Concentrate Conductivity (µS)

The mass balance equation is:

(Feed flow1 x Feed Conductivity) = (Permeate Flow x Permeate Conductivity)
+ (Concentrate Flow*Concentrate Conductivity)1Feed Flow equals Permeate Flow + Concentrate Flow

For example, if you collected the following data from an RO system:

Permeate Flow 5 gpm
Feed Conductivity 500 µS
Permeate Conductivity 10 µS
Concentrate Flow 2 gpm
Concentrate Conductivity 1200 µS

Then the Mass Balance Equation would be:

(7 x 500) = (5 x 10) + (2*1200)

3,500 ≠ 2,450

Then find the difference

(Difference / Sum) ∗ 100

((3,500 – 2,450) / (3,500 + 2,450)) * 100

= 18%

A difference of +/- 5% is ok. A difference of +/- 5% to 10% is generally adequate. A difference of > +/- 10% is unacceptable and calibration of the RO instrumentation is required to ensure that you are collecting useful data. In the example above, the RO mass balance equation falls out of range and requires attention.

Understanding the difference between passes and stages in a Reverse Osmosis (RO) system

The term stage and pass are often mistaken for the same thing in an RO system and can be confusing termonology for an RO operator. It is important to understand the difffernce between a 1 and 2 stage RO and a 1 and 2 pass RO.

Difference between a 1 and 2 stage RO System

In a one stage RO system, the feed water enters the RO system as one stream and exits the RO as either concentrate or permeate water.

In a two-stage system the concentrate (or reject) from the first stage then becomes the feed water to the second stage. The permeate water is collected from the first stage is combined with permeate water from the second stage. Additional stages increase the recovery from the system.1 and 2 stage RO diagram


In a Reverse Osmosis System an array describes the physical arrangement of the pressure vessels in a 2 stage system. Pressure vessels contain RO membranes (usually from 1 to 6 RO membranes are in a pressure vessel). Each stage can have a certain amount of pressure vessels with RO membranes. The reject of each stage then becomes the feed stream for the next successive stage. The 2 stage RO system displayed on the previous page is a 2:1 array which means that the concentrate (or reject) of the first 2 RO vessels is fed to the next 1 vessel.

RO System with Concentrate Recycle

With an RO system that can’t be properly staged and the feed water chemistry allows for it, a concentrate recycle setup can be utilized where a portion of the concentrate stream is fed back to the feed water to the first stage to help increase the system recovery.RO System with Concentrate Recycle Diagram

Single Pass RO vs Double Pass RO

Think of a pass as a stand alone RO system. With this in mind, the difference between a single pass RO system and a double pass RO system is that with a double pass RO, the permeate from the first pass becomes the feed water to the second pass (or second RO) which ends up producing a much higher quality permeate because it has essentially gone through two RO systems.

Besides producing a much higher quality permeate, a double pass system also allows the opportunity to remove carbon dioxide gas from the permeate by injecting caustic between the first and second pass. C02 is undesirable when you have mixed bed ion exchange resin beds after the RO. By adding caustic after the first pass, you increase the pH of the first pass permeate water and convert C02 to bicarbonate (HCO3-) and carbonate (CO3-2) for better rejection by the RO membranes in the second pass. This can’t be done with a single pass RO because injecting caustic and forming carbonate (CO3-2) in the presence of cations such as calcium will cause scaling of the RO membranes.
Single Pass RO and Double Pass RO diagram

RO Pretreatment

Proper pretreatment using both mechanical and chemical treatments is critical for an RO system to prevent fouling, scaling and costly premature RO membrane failure and frequent cleaning requirements. Below is a summary of common problems an RO system experiences due to lack of proper pretreatment.


Fouling occurs when contaminants accumulate on the membrane surface effectively plugging the membrane. There are many contaminants in municipal feed water that are naked to the human eye and harmless for human consumption, but large enough to quickly foul (or plug) an RO system. Fouling typically occurs in the front end of an RO system and results in a higher pressure drop across the RO system and a lower permeate flow. This translates into higher operating costs and eventually the need to clean or replace the RO membranes. Fouling will take place eventually to some extent given the extremely fine pore size of an RO membrane no matter how effective your pretreatment and cleaning schedule is. However, by having proper pretreatment in place, you will minimize the need to address fouling related problems on a regular basis.

Fouling can be caused by the following:

  1. Particulate or colloidal mater (dirt, silt, clay, etc.)
  2. Organics (humic/fulvic acids, etc)
  3. Microorganisms (bacteria, etc). Bacteria present one of the most common fouling problems since RO membranes in use today cannot tolerate a disinfectant such as chlorine and thefore microorganisms are often able to thrive and multiply on the membrane surface. They may product biofilms that cover the membrane surface and result in heavy fouling.
  4. Breakthrough of filter media upstream of the RO unit. GAC carbon beds and softener beds may develop an under drain leak and if there is not adequate post filtration in place the media can foul the RO system.

By performing analytical tests, you can determine if the feed water to your RO has a high potential for fouling. To prevent fouling of an RO system, mechanical filtration methods are used. The most popular methods to prevent fouling are the use of multi-media filters (MMF) or microfiltration (MF). In some cases cartridge filtration will suffice.


As certain dissolved (inorganic) compounds become more concentrated (remember discussion on concentration factor) then scaling can occur if these compounds exceed their solubility limits and precipitate on the membrane surface as scale. The results of scaling are a higher pressure drop across the system, higher salt passage (less salt rejection), low permeate flow and lower permeate water quality. An example of a common scale that tends to form on an RO membrane is calcium carbonate (CaCO3).

Chemical Attack

Modern thin film composite membranes are not tolerant to chlorine or chloramines. Oxidizers such as chlorine will ‘burn’ holes in the membrane pores and can cause irreparable damage. The result of chemical attack on an RO membrane is a higher permeate flow and a higher salt passage (poorer quality permeate water). This is why microorganism growth on RO membranes tends to foul RO membranes so easily since there is no biocide to prevent its growth.

Mechanical Damage

Part of the pretreatment scheme should be pre and post RO system plumbing and controls. If ‘hard starts’ occur mechanical damage to the membranes can occur. Likewise, if there is too much backpressure on the RO system then mechanical damage to the RO membranes can also occur. These can be addressed by using variable frequency drive motors to start high pressure pumps for RO systems and by installing check valve(s) and/or pressure relief valves to prevent excessive back pressure on the RO unit that can cause permanent membrane damage.

Pretreatment Solutions

Below are some pretreatment solutions for RO systems that can help minimize fouling, scaling and chemical attack.

Multi Media Filtration (MMF)

A Multi-Media Filter is used to help prevent fouling of an RO system. A Multi-Media Filter typically contains three layers of media consisting of anthracite coal, sand and garnet, with a supporting layer of gravel at the bottom. These are the medias of choice because of the differences in size and density. The larger (but lighter) anthracite coal will be on top and the heavier (but smaller) garnet will remain on the bottom. The filter media arrangement allows the largest dirt particles to be removed near the top of the media bed with the smaller dirt particles being retained deeper and deeper in the media. This allows the entire bed to act as a filter allowing much longer filter run times between backwash and more efficient particulate removal.

A well-operated Multi-Media Filter can remove particulates down to 15-20 microns. A Multi-Media Filter that uses a coagulant addition (which induces tiny particles to join together to form particles large enough to be filtered) can remove particulates down to 5-10 microns. To put this in perspective, the width of a human hair is around 50 microns.

A multi media filter is suggested when the Silt Density Index (SDI) value is greater than 3 or when the turbidity is greater than 0.2 NTU. There is no exact rule, but the above guidelines should be followed to prevent premature fouling of RO membranes.

It is important to have a 5 micron cartridge filter placed directly after the MMF unit in the event that the under drains of the MMF fail. This will prevent the MMF media from damaging downstream pumps and fouling the RO system.

Microfiltration (MF)

Microfiltration (MF) is effective in removing colloidal and bacteria matter and has a pore size of only 0.1-10µm. Microfiltration is helpful in reducing the fouling potential for an RO unit. Membrane configuration can vary between manufacturers, but the “hollow fiber” type is the most commonly used. Typically, the water is pumped from the outside of the fibers, and the clean water is collected from the inside of the fibers. Microfiltration membranes used in potable water applications usually operate in “dead-end” flow. In dead-end flow, all of the water fed to the membrane is filtered through the membrane. A filter cake that must be periodically backwashed from the membrane surface forms. Recovery rates are normally greater than 90 percent on feed water sources which have fairly high quality and low turbidity feeds.↑

Antiscalants and Scale Inhibitors

Antiscalants and scale inhibitors, as their name suggests, are chemicals that can be added to feed water before an RO unit to help reduce the scaling potential of the feed water. Antiscalants and scale inhibitors increase the solubility limits of troublesome inorganic compounds. By increasing the solubility limits, you are able to concentrate the salts further than otherwise would be possible and therefore achieve a higher recovery rate and run at a higher concentration factor. Antiscalants and scale inhibitors work by interfering with scale formation and crystal growth. The choice of antiscalant or scale inhibitor to use and the correct dosage depends on the feed water chemistry and RO system design.

Softening by ion exchange

A water softener can be used to help prevent scaling in an RO system by exchanging scale forming ions with non scale forming ions. As with a MMF unit, it is important to have a 5 micron cartridge filter placed directly after the water softener in the event that the under drains of the softener fail.

Sodium Bisulfite (SBS) injection

By adding sodium bisulfite (SBS or SMBS), which is a reducer, to the water stream before an RO at the proper dose you can remove residual chlorine.

Granular Activated Carbon (GAC)

GAC is used for both removing organic constituents and residual disinfectants (such as chlorine and chloramines) from water. GAC media is made from coal, nutshells or wood. Activated carbon removes residual chlorine and chloramines by a chemical reaction that involves a transfer of electrons from the surface of the GAC to the residual chlorine or chloramines. The chlorine or chloramines ends up as a chloride ion that is no longer an oxidizer.

The disadvantage of using a GAC before the RO unit is that the GAC will remove chlorine quickly at the very top of the GAC bed. This will leave the remainder of the GAC bed without any biocide to kill microorganisms. A GAC bed will absorb organics throughout the bed, which is potential food for bacteria, so eventually a GAC bed can become a breeding ground for bacteria growth which can pass easily to the RO membranes. Likewise, a GAC bed can produce very small carbon fines under some circumstances that have the potential to foul an RO.

The RO membranes are the heart of the RO system and certain data points need to be collected to determine the health of the RO membranes. These data points include the system pressures, flows, quality and temperature. Water temperature is directly proportional to pressure. As the water temperature decreases it becomes more viscous and the RO permeate flow will drop as it requires more pressure to push the water through the membrane. Likewise, when the water temperature increases the RO permeate flow will increase. As a result, performance data for an RO system must be normalized so that flow variations are not interpreted as abnormal when no problem exists. The normalized flows, pressures and salt rejection should be calculated, graphed and compared to the baseline data (when the RO was commissioned or after the membranes were cleaned or replaced) to help troubleshoot any problems and also determine when to clean or inspect the membranes for damage. Data normalization helps display the true performance of the RO membranes. As a general rule of thumb, when the normalized change is +/- 15% from the baseline data then you need to take action. If you don’t follow this rule then RO membrane cleanings may not be very effective at brining the membranes back to near new performance.

RO Membrane Cleaning

RO membranes will inevitably require periodic cleaning, anywhere from 1 to 4 times a year depending on the feed water quality. As a general rule, if the normalized pressure drop or the normalized salt passage has increased by 15%, then it is time to clean the RO membranes. If the normalized permeate flow has decreased by 15% then it is also time to clean the RO membranes. You can either clean the RO membranes in place or have them removed from the RO system and cleaned off site by a service company that specializes in this service. It has been proven that offsite membrane cleaning is more effective at providing a better cleaning than onsite cleaning skids.

RO membrane cleaning involves low and high pH cleaners to remove contaminants from the membrane. Scaling is addressed with low pH cleaners and organics, colloidal and biofouling are treated with a high pH cleaner. Cleaning RO membranes is not only about using the appropriate chemicals. There are many other factors involved such as flows, water temperature and quality, properly designed and sized cleaning skids and many other factors that an experienced service group must address in order to properly clean RO membranes.


Reverse Osmosis is an effective and proven technology to produce water that is suitable for many industrial applications that require demineralized or deionized water. Further post treatment after the RO system such as mixed bed deionization can increase the quality of the RO permeate and make it suitable for the most demanding applications. Proper pretreatment and monitoring of an RO system is crucial to preventing costly repairs and unscheduled maintenance. With the correct system design, maintenance program, and experienced service support, your RO system should provide many years of high purity water.

Reverse Osmosis Indonesia

Reverse Osmosis Indonesia Wattech WRO-4V & 4H

Sesuwaikan kebutuhan Anda Kami melayani Mesin Reverse Osmosis Sesuwai  pesanan Anda !!!!!!!!

WRO 4-H   

Reverse Osmosis Wattech WRO-4H

Reverse Osmosis Wattech






WRO-4V’ & ‘WRO-4H’ Sistem Reverse Osmosis

Spesifikasi  Umum

Sistem reverse Osmosis Industrial seri WATTECH WRO dirancang ekonomis dan menghasilkan air dengan kemurnian tinggi dengan menghilangkan mineral terlarut, bakteri, partikel, dan kotoran organik. Setiap mesin WRO dirancang menggunakan material kualitas tertinggi dan bahan operasional yang handal serta kinerja yang optimal. Mesin standar WRO-4 Series tersedia dengan kapasitas air produk dari 560-4530 Lph (13,600-108,800 LPD). Hubungi WATTECH untuk kapasitas air yang lebih besar dengan peralatan WRO-4 Series.

Sistem WATTECH reverse Osmosis memberikan kinerja yang optimal dalam berbagai aplikasi, sebagai berikut:

Air Baku Boiler •  Penelitian dan medical labs

Air Bilas •  Process air make-up

Pembuatan Es •  Humidification

Greenhouses •  Pertukaran ion pre-treatment

Parameter Operasional

Tekanan operasi: 200-250 psig

 Nominal Pemulihan: 65–75%

 Nominal Penolakan Garam: 98–99%

 Temperature Operasi: 45–85° F

 Desain Temperature: 50° F

 Tekanan Inlet Minimum: 30 psig

 Qualitas Air Inlet: Chlorine-Free/Softened

 Control Circuit: 120 VAC, 1-phase, 60 Hz.

Material Konstruksi

Rangka Skid: Epoxy-coated carbon steel

 Membrane Elements: Thin-film Composite (TFC)

 Membrane Housings: FRP

 Tekanan pipa rendah: Sch 80 PVC

 Tekanan Pipa Tinggi: 304SS

Pompa and Motor

Pompa: 304SS vertical multi-stage centrifugal

 Motor: TEFC, 460 VAC, 3-phase, 60 Hz.

Fitur Standard

4” x 40” penolakan membrane elements tinggi

 5-micron sediment pre-filter housing

 Automatic inlet shut-off valve

 Solid-state digital controller

 Pemancar conductivity air produk

 Pengoperasian Pressure gauges

 Produk dan concentrate flow meters

 Concentrate dan recycle flow control valves

 Inlet switch Tekanan Rendah dengan shutdown alarm

Penyediaan peralatan Opsional

Tangki penyimpananAtmosferdengan kontrol leveldanpomparepressurization

 Softeners Air dan carbon filter pretreatment

 Pressurized tangki vessels

 Paket dudukan Skid dengan pre/post peralaan treatment

 Sistem pembersihan membrane ditempat

 Sistem injeksi chemical Pretreatment



  Type       Kapasitas       Aliran Produk      Air   Umpan   JumlahMembran   UkuranMembran   Daya Listrik   Dimensi
WRO 4V 4000 gpm
2.8 gpm 6.8 gpm 3 4 x 40 in 2 hp 36x19x71
WRO 4v 5500 gpm
3.8 gpm 7.9 gpm 4 4 x 40 in 2 hp 36x19x71
WRO4H 7000 gpm
4.9 gpm 9.2 gpm 5 4 x 40 in 3 hp 36x19x71
WRO4H 10000 gpm
6.9 gpm 13.0 gpm 7 4 x 40 in 3 hp 36x25x71
WRO4H 15000 gpm
10.4 gpm 17.9 gpm 11 4 x 40 in 3 hp 41x32x73


1.1 Penyediakan sistem seperti yang ditunjukkan manufacture reverse osmosis (RO) untuk kemudahan instalasi dan start up. Sistem ini harus dari desain disetujui dan dibuat oleh produsen secara langsung terlibat dalam produksi peralatan pengolahan air. Semua peralatan dan bahan harus dipasok sesuai dengan spesifikasi yang lengkap dan sistem operasional.
1.2 Produsen yang memenuhi syarat dari peralatan pengelolaan air harus terlibat dalam pembuatan peralatan untuk jangka waktu tidak kurang dari (10) tahun. Produsen yang diterima adalah PT. WATTECH atau Engineer yang disetujui.
2.1 Sistem ini, sesuai dengan spesifikasi peralatan, digambarkan sebagai
2.2 Spesifikasi sistem berdasarkan pada WATTECH Model WRO __________________________________ 3.0 DATA DESAIN
Desain sistem Aliran LPH (RO make-up rate) Desain sistem Aliran LPH (Distribusi) Berapa Air yang digunakan Liter / Day Berapa permintaan air harian Hours / Day Kisaran temperatur operasi °F Kisaran tekanan operasie (Sistem) PSIG Kebutuhan Elektrik Dimensi (LxWxH) Kapasitan penampungan diinginkan Liter.
3.2 ANALYSIS AIR (masukkan laporan kualitas air baku yang akurat di sini)
3.3 KUALITAS AIR YANG DINGINKAN (masukkan parameter kualitas air akhir di sini)
4.1 RO MEMBRANE ELEMENTS Unsur-unsur RO harus thin-film composite (TFC), 4″ diameter x 40″ panjang dengan FRP overwrap, perangkat anti-telescoping dan U-CUP Seal air garam. Desain penolakan garam harus 98% berdasarkan 2000-PPM air dan 225 PSIG pada 77 derajat F.
4.2 RO ELEMENT HOUSINGS Element housings RO harus terbuat dari fiberglass reinforced polyester (FRP) dengan tutup PVC. Klem stainless steel end caps. Setiap housing assembly harus lengkap dengan satu set O-ring dan pelumas Oring.
4.3 HIGH PRESSURE PUMP DAN MOTOR Pompa harus vertikal, jenis sentrifugal multistage terbuat dari casing stainless steel 304, shaft, impeller, inlet dan besi cor. Semua bantalan pompa harus tungsten carbide dan keramik. Pompa harus memiliki kerangka besi cor dengan koneksi suction / discharge connections. Standard motor harus dipasang ke adaptor yang didukung pada frame pompa-bearing. Putaran Motor harus untuk 3500 RPM, 460 VAC, tiga fase, 60 Hz. power supply. 4.4 SISTEM KONTROL ELECTRIK Sistem kontrol ini terdiri dari mikroprosesor controller dan pengkabelan motor starter panel oleh perusahaan perakitan dan diuji. Chasing harus 4X dinilai dan dirakit dari FRP. pressure switch harus disediakan untuk mematikan pompa RO dalam kondisi tekanan rendah. Indikator run-time pompa harus ada. Indikator pretreatment interlock dan kontrol harus disediakan untuk mencegah operasi RO bila peralatan pretreatment (seperti filter karbon aktif) off-line dalam kasus backwash atau regenerasi. Indikator autoflush dan kontrol harus ada untuk menyiram konsentrat RO pada mesin shutdown dan atau interval yang telah ditentukan.
4.5 INSTRUMEN Dua (2) panel-mount flowmeters, satu produk dan satu konsentrat harus disediakan. Alat pengukur tekanan Panel-mount untuk inlet, outlet cartridge filter, RO feed, RO konsentrat, dan produk RO harus stainless steel 316 dan berisi cairan. Monitor panel-mount Konduktivitas harus disediakan untuk mengukur kualitas produk RO (dalam mikrosiemen / cm). Monitor harus memiliki tampilan digital, relay alarm, dan kompensasi suhu otomatis. Probe konduktivitas harus dipasang di RO pada stopkontak produk dan peng-kabel ke monitor konduktivitas.
4.6 VALVES Pompa throttle valve, concentrate throttle valve dan recycle throttle valve akan dipasang sejajar, terbuat dari stainless steel lebih dari 300 PSIG. Katup penutup otomatis inlet harus dari tipe diafragma, solenoid diputar terbuka dan terbuat dari kaca-diisi Noryl termoplastik. Katup inlet isolasi, produk berkonsentrasi memeriksa katup dan katup sampel harus PVC dengan EPDM dan seal. Harus ada katup sampel outlet filter cartridge dan berkonsentrasi jalur produk. Mesin harus dilengkapi dengan automatic membrane flush valve untuk membersihkan membran RO dengan air bersih ketika mesin dimatikan sebagai sarana mengurangi membran scaling dan fouling.
4.7 CARTRIDGE PRE-FILTER Cartridge filter housing harus disediakan dalam Jalur inlet dan terbuat dari polypropylene dan termasuk pelepas tekanan built-in atau katup ventilasi. Elemen filter harus dibuat dari spun-wound polypropylene untuk nominal 5 mikron.
4.8 SKID DAN RANGKA Semua mesin RO akan dibuat di atas skid dan bingkai terbuat dari baja karbon struktural dan dilas. Seluruh permukaan harus sand-blasted dan finishing dicat “Safety Blue” self-priming, high solids epoxy overcoat.
4.9 PERPIPAAN Semua perpipaan tekanan rendah (75 psig atau kurang) harus terbuat dari PVC.Sch 80. Tubing produk RO dari masing-masing housing membran harus terbuat dari PVC. Semua kontrol dan tubing pressure gauge harus terbuat dari polyethylene.
Semua pipa tekanan tinggi (75 psig atau lebih tinggi) harus dibuat dari stainless steel 304. Berurutan dan fitting kompresi tekanan tinggi terbuat dari stainless steel atau kuningan yang direkomendasikan. Kontrol tekanan tinggi dan pengukur tekanan tubing harus burst nylon 1000 psig.
4.10 INSTRUKSI Penyelesaian 2 set , Operasi dan Manual Book harus disediakan dalam 3 bundel buku panduan. Petunjuk umum As-built, proses dan instrumen, dan electrical drawings harus disertakan. Semua data komponen, manual, dokumen kalibrasi juga harus disertakan. Daftar suku cadang yang direkomendasikan harus disediakan.
4.11 GARANSI Manufacture harus menyediakan spare part untuk 18 bulan dan Garansi dari tanggal pengiriman peralatan. Garansi elemen Membran adalah standar garansi yang dipilih produsen RO elemen.
4.12 SERVICE Startup On-site atau pelayanan service disediakan dari fabrikator atau perwakilan produsen lokal. layanan telepon sebagai dukungan dan suku cadang juga harus tersedia dari produsen. Tarif dan harga yang harus disertakan dengan jelas dalam operasi dan manual pemeliharaan.
5.1 MULTI-MEDIA FILTER A multi-media filter ukuran tunggal yang sesuai dengan laju aliran inlet mesin RO harus disediakan untuk menghilangkan padatan ke urutan 10-20 mikron. Tangki Media yang akan terbuat dari fiberglass diperkuat poliester (FRP) dirancang untuk 150 psig. Internal Distributor backwash sesudah perpipaan dan air kolektor yang disaring harus disediakan. Media filter terdiri dari antrasit lapisan atas, pasir silika lapisan tengah, dan multi-grade garnet lapisan bawah. Media filter harus disediakan secara terpisah dalam satu (1) cubic foot bags dan dipasang pada pekerjaan-site. Siklus backwash otomatis harus dilakukan oleh top mounted, katup kontrol piston dioperasikan dengan pre-sized saluran orifice pembuangan kontrol aliran. Siklus backwash dilakukan tujuh (7) hari elektro-mekanis. Dasar Desain: WATTECH MID Series.
5.2 CARBON AKTIF FILTER Filter karbon aktif tunggal ukuran yang sesuai dengan laju aliran inlet mesin RO harus disediakan untuk menghilangkan klorin dan pencegahan kerusakan membran RO. Tangki Media yang terbuat dari fiberglass diperkuat poliester (FRP) dirancang untuk 150 psig. internal distributor backwash sesudah perpipaan dan kolektor air harus disediakan. Media filter terdiri dari mesh 12 x 40, karbon batubara bituminous berbasis aktif. Media filter harus disediakan dalam satu (1) cubic kaki dan dipasang pada pekerjaan-site. Siklus backwash otomatis harus dilakukan pada top mounted, katup kontrol dioperasikan dengan pre-ukuran saluran pembuangan kontrol aliran orifice. Siklus backwash untuk diinisiasi oleh adjustable tujuh (7) hari elektro-mekanis kalender kerja. Dasar Desain: WATTECH ACA Series
5.3 SOFTENER AIR Ukuran Double softener air yang sesuai dengan laju aliran inlet mesin RO dan kesadahan air yang masuk harus disediakan untuk mencegah scaling elemen membran RO. Tangki resin yang akan dibuat dari fiberglass diperkuat poliester (FRP) dirancang untuk 150 psig. Internal distributor backwash sesudah perpipaan dan kolektor water softener harus disediakan. Softening resin harus memiliki kapasitas pertukaran 30.000 butir per kubik ketika regenerasi dengan garam £ 15. Tangki air garam harus dibuat dari polietilen berbentuk rotationally dengan penutup yang sesuai. Float dioperasikan, check katup udara pada air garam harus disediakan dan secara otomatis mengukur jumlah air garam yang benar ke unit softener dan pengisian kembali dengan air tawar.
softener regeneration harus dilakukan pada top-mouned, kontrol katup piston dioperasikan dengan kontrol aliran pra-size dan injektor air garam. meteran air harus dipasang untuk memantau volume air olahan dan secara otomatis memulai regenerasi softener. Alternator Controller harus disediakan yang memungkinkan satu pengiriman dalam setiap pelayanan. Tangki kedua adalah untuk regenerasi atau mode stand-by setiap saat. Dasar Desain: WATTECH Series.
5.4 CAMPURAN INLET AIR KATUP Termostatik katup tempering air harus disediakan untuk meningkatkan suhu air 75-77 ° F untuk inlet RO dan meningkatkan kinerja mesin. Putar tuas Katut untuk stop, pindahkan cartridge / saringan, cek stainless steel internal piston,cek suhu regulator, cek katup inlet panas / dingin, dan cek keluaran termometer bimetal. Basik Desain: Wattech
5.5 SDI APPARATUS Silt Density Index (SDI) adalah peralatan harus disediakan untuk mengukur tingkat padatan umpan yang tersuspensi pada membran RO. Ini terdiri dari alat pengukur tekanan regulator, filter holder, 600 mL gelas kimia, katup sampel, tabung dan 0,45 mikron kertas filter.
5.6 ALAT UJI AIR Alat pengujian air yang berkualitas dan komprehensif harus disediakan untuk bidang-mengukur kesadahan total air, jumlah besi, klorin bebas, dan pH.
6.1 TANGKI PENAMPUNGAN ATMOSPHERIC Tangki penyimpanan air produk RO yang berdiri bebas dan dibuat dari polyethylene linear dalam satu set, Konstruksi dari seamless dan Penutup, desain dasar datar. Tangki harus memiliki manway atas untuk mempermudah akses. Sekat fitting PVC harus dipasang untuk high / low-level switches, menyerapan RO inlet, menyerap debit RO, dan drain. 0,2-mikron tangki vent filter harus dipasang dibagian atas tangki.
6.2 LEVEL CONTROL UNTUK TANGKI PENAMPUNGAN Adjustable float switch harus disediakan untuk tangki penyimpanan produk. Pindahkan sinyal start/stop ke unit RO. secondary adjustable float switch harus disediakan untuk level tangki rendah, dan signal menutupoff dari pompa repressurization.
6.3 POMPA RO RE-PRESSURIZATION Penggabungan, pompa single-stage centrifugal harus disediakan untuk distribusi air RO.Satu Pompa, pipa dan kabel dirancang sebagai cadangan. Komponen yang basah harus dibuat dari stainless steel 316 dengan koneksi suction / discharge NPT. Motor harus ODP dengan putaran 3500 RPM, 460 VAC, tiga fase, power supply 60 Hz. pompa panel 4X-kontrol terbuat dari fiberglass dan dilengkapi dengan starter motor yang telah dipersiapkan, Selector switch Pompa, pompa run lights, Lampu Alarm tangki level rendah, hand / off / auto switch, dan Meteran Pompa. Basik desain: Wattech Series.
6.4 LAMPU ULTRAVIOLET Lampu ultraviolet desinfeksi air harus disediakan untuk penghancuran bakteri air dalam tangki penyimpanan dan jalur distribusi. Lampu wavelength 254 nm Life Time 9,000 jam. Bejana tekan harus stainless steel 316 dengan NPT atau flanged inlet inlet / stopkontak. Lampu UV harus ditempatkan heavy-duty quartz jacket. 3R electrical control cabinet harus mencakup run time meter dan lampu ballast power indicator. Kontrol ON / OFF akan ditransfer melalui kontrol panel pompa. Dasar Desain: R-Can sterilight Series
6.5 POST-FILTER HOUSING Dirancang untuk kontaminasi perangkap hilir dari sinar UV. Filter houshing harus dibuat dari polypropylene atau stainless steel 316 dan masuk dalam pressure relief valve. Elemen filter spun-wound polypropylene dan dinilai untuk nominal 1,0 mikron.
Mesin RO, peralatan pre-treatment, dan peralatan pasca perawatan (tidak termasuk tangki penyimpanan air RO) diberikan dipasang komplit dan dibingkai rakitan terbuat dari baja karbon struktural yang dilas. Semua perpipaan interkoneksi dan isolasi manual / katup memotong antara peralatan harus disediakan. Piping dan katup yang akan dibangun dari Sch 80 PVC. Panel kontrol listrik dan semua kabel interkoneksi harus disediakan dalam saluran fleksibel kedap air. Penyambungan listrik untuk tiga fase dan daya satu fase yang diinginkan.

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