Chola Aqua Techchola aqua technologies and services


Sewage Treatment Plant

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Our rich industry experience has helped us in offering designing, engineering, erection, testing and installation service for Sewage Treatment Plant to our clients. This plant is based on MAR (Multi stage bio aerobic reactor) technology and is provided with self regulating systems. With the assistance of our advanced technology and skilled professionals, we are able to offer our services in an effective manner.

Vision -For New Sewage Treatment System Install:
  • Self depended
  • Cost effective
  • Power saving
  • Eco friendly system with
  • Ground recharge
About New STP:
  • Advanced proven technology
  • MAR(Multistage bio-aerobic reactor) technology
  • Design,build by CAT
  • 100% result oriented treatment methodology
Features of New STP:
  • Odorless operation with self regulating system
  • Non–clogging design, better oxygen transfer efficiency
  • Simple to operate with low maintenance
  • Attached growth process– No sludge recycle and no monitoring
  • High Bio–Film surface area; compact plant with high loading rates
  • Removes E E-Coli (Coli form)
Simplicity in Operation and Maintenance:
  • Easy to operate and maintain under widely fluctuating conditions
  • Easy to install and dismantle easy to move any where
  • Enable easy operation, even by unskilled operator
No Disposal Problem:
  • The new STP system produces quality water
  • After reuse, excess water will be recharged in earth

RO Plant

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We offer a wide range of Reverse Osmosis Plants, which are available different specifications. Our range of plants find application in different residential areas. Used for reducing suspended solids and eliminating odor, taste, these plants are highly efficient. We also offer installation services to our valuable clients. Available in various specifications, our clients can avail them at reasonable prices.

RO Plant
Water a fundamental requirement of Life is becoming a scarce commodity. It is not always that we get water to suit our needs. Supended Particles, Biological foulants & many a time Higher tonic contents are to be removed from basic Source Water to get Purified Water for various applications like Potable Water, Desalination, Ultrapure Water for Semiconductor Manufacturing, Electroplating Rinse Water, Waste Water Recycle, Pharmaceutical, Food Processing, etc.

Sometimes, the Concentrates separated from Feed Stream are the desired End Products for applications like ED Paint Recovery, Juice/Food/Tea?Sweetener Concentration, Recovery of valuable materials etc. from process streams.

REVERSE OSMOSIS is the latest state-of-the -art Technology used for above such Applications.

High Recovery RO Plant

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We provide High Recovery RO Plant that is used in various industries for the desalination process. The RO plant consists of tanks, automated valves, a spiral wound membrane and high pressure pumps. The plant is low in maintenance, durable, have longer functional life and delivers optimum performance. Our plant finds application in textile, leather, automobile, paint, pharmaceuticals and fish processing industries.

Effluent Treatment Plant

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Keeping in mind the environmental safety, we provide Effluent Treatment Plants to remove the pollution effluents with economical operation to meet the stringent pollution control norms. These are based on advance technology and are widely used in various areas such as textile, paint, beverage and automobile industries.

  • Low maintenance
  • Operational fluency
  • Easy to install
Application Area:
  • Textile industries
  • Leather industries
  • Automobile industries
  • Paint industries
  • Food and processing industries
  • Fish processing industries
  • Pharmaceuticals
  • Beverage industries
  • Sugar and distilleries
  • Aquaculture effluents

Zero Liquid Discharge System

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We offer Zero Liquid Discharge System that are widely used in various industries to remove contaminants from the waste water so the water can further be used in other process applications. The features associated with the system are durability, low maintenance, low operating cost and no fouling or scaling. The ZLD system is required because of raw water scarcity and legal compliance.

Water Softener

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We provide Water Softener, which is sourced from reputed manufacturers who make use of quality raw material and latest technology in the production process. This softener is used for eliminating calcium & magnesium from water. It reduces hardness from water and makes the hard water potable.

  • High efficiency
  • Robust construction
  • Long service life
  • Precision functioning

Membrane Filter

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We provide Water Softener, which is sourced from reputed manufacturers who make use of quality raw material and latest technology in the production process. This softener is used for eliminating calcium & magnesium from water. It reduces hardness from water and makes the hard water potable.

  • High efficiency
  • Optimum performance
  • Long service life

Iron Removal Filteration Systems

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We manufacture and export superior quality Iron Removal Filtration Systems that are acknowledged for their outstanding performance and incomparable features. These plants are used to remove iron contents from the water. Known for rigid construction, durability and corrosion resistant, these systems are cost effective and highly reliable.

Iron Removal Filteration
We manufacture and export iron removal filters which filters the water in such a manner so that it is completely free and safe from all the dissolved iron contents which can cause harmful effect to the body. Dissolved iron in the water precipitates as ferric hydroxide when the carbon dioxide from the raw water is released and water comes in contact with oxygen from the air. These iron filters are not only easy to maintain and install but also cost effective and highly reliable.

UV Filter

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We are one of the leading manufacturers and suppliers of an excellent array of Ultra Filter (UV Filter) that are fabricated from graded raw material. These filters are highly capable and are widely used in several industries. Our equipment are widely accepted in the market due to their high functionality and user friendly features.

UV Filter
An Ultra Filter Unit is required in this process for the removal of water-dissolved impurities from the bath. This Unit consists of a Membrane of suitable capacity, high-pressure Pump and inlet outlet pipes. The Unit is conveniently mounted on Angle Frame.

Activated Carbon Filtration

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Activated carbon filters to remove contaminants and impurities through chemical adsorption. Each piece of carbon is designed to provide a large section of surface area, in order to allow contaminants the most possible exposure to the filter media. In theoretically One pound (454g) of activated carbon contains a surface area of approximately 100 acres (1 km²/kg). This carbon is generally activated with a positive charge and is designed to attract negatively charged water contaminants.

Carbon filters are most effective at removing chlorine, sediment, and volatile organic compounds (VOCs) from water. Typical particle sizes that can be removed by carbon filters range from 0.5 to 50 micrometres. The efficacy of a carbon filter is also based upon the flow rate regulation. When the water is allowed to flow through the filter at a slower rate, the contaminants are exposed to the filter media for a longer amount of time.

There are two main types of carbon filters used in the filtration industry: powdered block filters and granular activated filters. In general, carbon block filters are more effective at removing a larger number of contaminants, based upon the increased surface area of carbon. Many carbon filters also use secondary media, such as silver imprecated carbon to prevent bacteria growth within the filter.

Carbon filters have been used for several hundred years and are considered one of the oldest means of water purification. Historians have shown evidence that carbon filtration may have been used in ancient Egyptian cultures for both air and water sanitization. Currently, carbon filters are used in individual homes as point-of-use water filters and, occasionally, in municipal water treatment facilities. They are also used as pre-treatment devices for reverse osmosis systems and as specialized filters designed to remove chlorine-resistant cysts, such as giardia and cryptosporidium.

boiler and cooling tower RO PLANT

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Process RO PLANT covers the wide range of boiler feed water, cooling water for heat exchangers or engine, chemicals dilution, etc...

It should typically have a conductivity ranging from 0,1 to 50 uS/cm, with little to no hardness to avoid scaling in heating systems.Oxygen and carbon dioxide should be removed to prevent corrosion.

Once demineralised, process water should be conditioned according to manufacturer's specification, usually up to pH 9 by adding caustic soda or ammonia.


Boiler Feed Water Treatment

Proper treatment of boiler feed water is an important part of operating and maintaining a boiler system. As steam is produced, dissolved solids become concentrated and form deposits inside the boiler. This leads to poor heat transfer and reduces the efficiency of the boiler. Dissolved gasses such as oxygen and carbon dioxide will react with the metals in the boiler system and lead to boiler corrosion. In order to protect the boiler from these contaminants, they should be controlled or removed. Except for steam trap maintenance, water treatment has the most potential for reducing annual operating costs in a power plant.

Cooling tower Water Treatment

Prevention of corrosion is crucial in cooling systems. Hexavalent chromium-based ("chrome") compounds are used as efficient and cheap corrosion inhibitors. The trouble is, hexavalent chromium is a suspected carcinogen, and is highly toxic. Chrome emissions from cooling towers in New Delhi alone could cause as many as 700 cancer cases over a 70 year exposure period. Reverse osmosis and ion exchange provide a clean, safe way of removing mineral contaminants from cooling water without harmful chemicals. Below are the desired characteristics of cooling water:


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CAT  supplies any water treatment in a containerizable version with various available options based on : Plant size, Accessibility requirements, Site temperature, zone requirements Containerization of a water treatment plant does not only include the supply of a container, it includes the complete installation of the plant:

Connected piping between equipment pumps, vessels, skids, tanks

Cabling and wiring of pumps and instrumentation inside the container to main control cabinet.

Containization presents many advantages:
  • Limited civil works (only container foundation)
  • Fast implementation (turnkey "plug and play “unit)
  • Mobility

Plant Size
Depending on the plant size 10, 20 or 40 ft container(s) are available.In order to ease filter refill or membrane replacement, extra doors can be built on the side or on the roof. The container can have one double door or two double door access for maintenance purpose.We also offer collapsible container to ease heavy maintenance.


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Plants of this type produce demineralised water by means of ion exchange technology.

Among other things, they are used in hospitals and laboratories as well as in the production of process water, water for steam boilers and high-pressure hot water boilers, and cooling water.

The plants are of packaged modular design which gives competitive prices.
CAT - standard range of products covers most requirements. The plants have a simple structure, are easy to operate, and the design is corrosion-resistant and compact. Frame-mounted plants are easy and quick to install.

Plant description
Flow rates for standard modules: Up to 50 m³/h. Demineralization plants are produced as automatic, two-tank plants (co-currently and counter currently regenerated) and mixed-bed plants in which the regeneration either takes place on site or on the basis of service. Mixed-bed is frequently used where stringent requirements for low contents of salt and silica apply. 


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Hardness in water is caused by certain salts. The main hardness causing ions are Calcium (Ca2+), Magnesium (Mg2+) and Bicarbonate (HCO3-). These ions or minerals are normally addressed as scale in the water causing scaling of pipes and equipment in drinking water and process water systems. Softening units offer a water purification solution for hard water and lime scale removal.


In many applications, e.g. the preparation of drinking water, water in breweries and sodas, but also cooling water and boiler feed water, the hardness of the water is of importance.

The hardness is normally measured in German degree, French Hardness or (equivalent) concentration Ca2+.  Softeners  are specific ion exchangers which are designed to remove ions with a multiple positive charge.
 CAT- offers water softeners and related equipment for households, laboratories and industrial applications. 

Water softener units are automatically regenerated with salt (NaCl).Brackish water softeners are also available using specific resins and regenerated with HCl and NaOH.For servicing, repair or requests for water softener parts or hard water test kits, contact us.


Through softening, the calcium and magnesium salts in the water are exchanged for sodium salts which do not cause the disadvantages of hard water. The method is used in industries and institutions for treatment of water for steam boiler plants and district heating plants, laundries, cooling towers, rinse processes, washing, dishwashing, etc.


Individual solutions
The broad program makes it possible to choose the optimum plant for the project whether the need is continuous or discontinuous water supply.

Plant design
Flow rates for standard modules: Up to 350 m³/h per unit. The plants are produced as one-tank plants and multi-tank plants as well as cold water plants and hot water plants. The filter tanks are made of steel and coated with polyethylene. Each plant is supplied with a control unit adapted to the job. The plant can either be timer controlled or meter controlled. Meter control gives the best average water quality and economy.

Frame-mounted plants ensure safe and quick installation
Several of the two-tank plants can as standard be delivered as a unit in which tanks, pipe system, and controls are built together and mounted on a frame. The concept "Plug & Play" ensures a safe and quick installation.

Brine tank - brine maker

The brine tanks are made of breach proof polyethylene and are essay to fill and clean. The brine maker can be added to several of the plant series and is delivered as standard with the plant.


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Iron removal plants can be based on different filtration media, depending on the iron and manganese concentration, the oxygen level, CO2 content and hardness of the water.


Plant principle:
First, air is injected in order to oxidize the iron. The oxidized iron will then precipitate on a sand filter. An MnO2 layer in the sand bed will catalyze the oxidation of residual iron. Backwash will be done by water and by air. More on iron removal principles.


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Most wastewater treatment systems require clarification; the process of removing solids from water. There are several ways to provide clarification effectively. For some, a Lamella Clarifier may be the best choice. The CAT - Lamella Clarifier provides the clarification needed in many applications. CAT has many years of successful experience in the design and supply of wastewater treatment systems. Whether simple or complex, CAT systems are proven to do the job. The CAT- Lamella clarifier is an effective and reliable way to separate solids and water Design of the CAT-LC is based on proven principles of gravity separation and years of practical experience. Because it uses only gravity, CAT-LC is reliable and energy efficient. Standard construction in steel or in optional stainless steel makes the CAT-LC durable. CAT-LCsystems are skid mounted, preassembled, pre piped and prewired at the factory to minimize installation time and expense. A range of standard sizes are available to suit the specific needs of most applications.

CHOLA AQUA TECHNOLOGIES & SERVICES line of Inclined Plate (Lamella) clarifiers is engineered to remove settle able suspended solids from wastewater or process streams by the most efficient means available.  A properly designed Inclined Plate (Lamella) clarifier will remove these solids allowing downstream filters or process equipment to perform as designed, as well as reducing overall operating costs and improving overall system maintainability.

Every Inclined Plate (Lamella) Clarifier is available with numerous plate spacing options.  By altering the plate spacing (to allow for different solids loading ratios, settling rates, etc.) CAT- can make certain your clarifier is sized appropriately for your application.  By combining the plate spacing options with different Inclined Plate (Lamella) clarifier configurations, CAT-LC ends up with the largest line of clarifiers available.   This allows us to solve a tremendous variety of water treatment issues, making CAT  Inclined Plate (Lamella) Clarifiers the most versatile systems available.

Standard Features:

  • Adjustable effluent V-notch troughs
  • Epoxy coated ASTM A-36 carbon steel tank
  • Factory tested
  • Polypropylene plate packs
  • Seamlessly integrates with other Hydro-Flo offered wastewater products
  • Stand alone operation
  • Standard units can be manufactured for flows from 5 gpm to 200 gpm and above, in a single above grade tank
  • Structural steel support legs



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MBBR - Moving Bed Bio film Reactor
With the Moving bed Bioreactor (MBBR) an economically solution is offered for wastewater treatment if the "bulk" of the pollution load must be disposed of (as means of cost reduction) or if applicable discharge regulations are not as strict. With this application we offer advanced wastewater treatment solutions for the industrial and municipal markets. These solutions significantly increase the capacity and efficiency of existing wastewater treatment plants, while minimizing the size of new plant deployments.

This method makes it possible to attain good efficiency results of disposal with low energy consumption. This process is used for the removal of organic substances, nitrification and denitrification.

The MBBR system consists of an activated sludge aeration system where the sludge is collected on recycled plastic carriers. These carriers have an internal large surface for optimal contact water, air and bacteria.


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Water contains three major impurities Physical, Biological, Chemical. Physical impurities troubles in various industrial, commercial and domestic applications hence for better quality physical impurities required to reduce up to application standards. Physical impurity is decreased by filtration, various kind of filtration system available for different application with different sharpness of removal in macro to micron.



The MGF works on principle of retention and removal of physical impurity in a graded manner through Voids of the filtering media.


This is a Stainless Steel inside Rubber Lining (SSRL) pressure vessel, with internal distribution & collection systems. The frontal and inter connecting pipes and requisite ITALIC valves of BRASS construction along with one lot of sand, silex & pebbles. The necessary instruments like inlet / outlet, pressure gauges are provided with the system.


The physical impurities of raw water i.e. suspended solids, dirt, dust, & all visible particles are removed in M FILTER up to 50 micron.


The system reduces the physical impurity load to less then 2 ppm the system can take load of 20 ppm -25 ppm of suspended solutions. 

Product Description

Multigrade filter is a depth filter that makes use of coarse and fine media mixed together in a fixed proportion. This arrangement produces a filter bed with adequate pore dimensions for retaining both large and small suspended particles. This filter performs at a substantially higher specific flow rate than conventional filters. Specific flow rates of 15 – 30 m/h have been successfully obtained for treating waters containing 25 – 50 ppm suspended solids respectively to produce filtrate with less than 5 ppm.



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Nanofiltration (in its abbreviated terminology known as NF or loose RO) is a process that fits between Ultra filtration and Reverse Osmosis. This is in reference to the size range of molecules being targeted. The pores in a Nanofiltration membrane are 0.001 – 0.005 microns and the pressure requirements are medium to high of 10 – 30 Bar.

The selectivity of a Nanofiltration membrane is determined by two different parameters.
Firstly, retention depends on the compound size i.e. from molecular weight. As far as Nanofiltration membranes are concerned, retention and permeability are also a function of electric charge and the valence of the salts and compounds in the solution. Diluted solutions of monovalent ions can mostly pass through a nanofiltration membrane unhindered while most of the multi-valent ions (such as sulfate and carbonate) are retained. As for anions, retention by a nanofiltration membrane increases in the order: nitrate < chloride < hydroxide < sulfate < carbonate < phosphate. Cation retention by a nanofiltration membrane increases in the order: proton < sodium < potassium < calcium < magnesium < copper < iron.


This process is used to remove salt and to concentrate very small molecular weight substances. 

Typical applications include:

  • concentrating and desalting dairy or food products (lactose)
  • protein recovery
  • concentration of sugars
  • ash removal
  • dye purification

A range of membrane types are available, however the most common type is the spiral wound membrane.


ultra filteration

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UltraFiltration Membrane, Principles of Ultrafiltration
Ultrafiltration (UF) is an important water purification technology used for production of high-purity water. UF is effective in the removal of colloids, proteins, bacteria, pyrogens (e.g. gram-negative bacterial endotoxins), and other organic molecules larger than .01 Micron size. 

Basic Principles of Ultrafiltration
Ultrafiltration is a pressure-driven purification process in which water and low molecular weight substances permeate a membrane while particles, colloids, and macromolecules are filtered. The primary removal mechanism is size exclusion. A properly designed UF cartridge allows efficient rising of ionic residue from the cleaning and rapidly returns to optimal resistivity and organic purity (see figures 1 and 2). Reagent-grade sodium hydroxide has proven to be and effective cleaning agent with the following benefits:

  • Effective bacterial destruction
  • Effective depyrogenation (endotoxin reduction)
  • Efficient destruction of organic contamination
  • Reduced occurrence of chemical by-product formation
  • Minimal residue of chemical interference
  • Economical and easy-to-use cleaning age



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Softening is a process where Calcium and Magnesium ions are exchanged for Sodium ions. Calcium and Magnesium ions associated with Alkalinity contributes for scale formation. These ions are also called as Total hardness. The strong acid cation ion exchange resin in Sodium form is used for softening the water. When the resin is exhausted , it is regenerated with brine solution ( Sodium Chloride ) 10 % or 15% brine solution is normally used for the regeneration. If the brine solution is passed from the bottom of the resin and service flow is from the top, then it is called as Up flow softener. If the service and regeneration flows are from top to bottom, then it is called as Coflow softeners. The softeners are run up to the Hardness slip of 5 ppm as CaCO3 in the treated water which is called as Industrial Zero hardness.


Product Description ::

Industrial Up flow Softeners are manually operated and designed to suite the requirements of medium scale industries. They incorporate the prove technique of counter flow regeneration. The unit thus produce treated water with low residual hardness throughout the cycle.A strongly acidic cation exchanger in sodium form is used to exchange sodium ions for the hardness forming calcium and magnesium, thus producing soft water. At the end of each service cycle, the ion exchange is regenerated with sodium chloride solution, after which the unit is ready for the next service cycle. For introducing the brine into the unit, a hydraulic ejector with control valve, suction and delivery piping are provided. A combined salt tank which can hold sufficient quantity of salt for a number of regeneration is provided. The unit is supplied in a knocked-down condition and is easily assembled at site. To meet special requirement, these softeners can be supplied for automatic operation.

Advantages ::

  • Consistent treated water quality
  • Easy to install and operate
  • Produces clear, soft and non-scale forming water
  • Low operating costs
  • Incorporates high capacity polystyrene bead type cation exchange resin which is remarkably stable and has a long life