Dhal Engineering Company Netaji Nagar, Kolkata, West Bengal

The Water Softener, offered by us, is designed by the experienced engineers in compliance with the set industrial quality standards only. We are counted amidst the eminent Water Softener Manufacturers and Suppliers, located in India. Our Water Softeners are high in performance and long lasting in nature. Process During service period polystyrene base resins in sodium form adsorb calcium, magnesium in raw water and after producing certain amount of soft water these are exhausted. These then require regeneration with 5 to 10% common salt solution In case of big units, saturated salt solution is prepared in a r. C. C. Tank and required amount of brine is drawn in a brine measuring tank The brine soln. Is then diluted with the help of an injector and fed into the softener. In case of medium size softener salt solution is prepared in a salt pot and instantly fed into the softener In case of small size softener, salt is dumped inside the shell. Excess brine is then drained during the period of rinsing with filtered water Soft water is then tested with the help of a hardness test kit and fed into different processes A water meter is incorporated on the line for measuring total amount of soft water treated by the softening unit. Features: Boilers Cosmetics Chemical Hospitals Manufacture Pigment manufacture Textile mills Dye washes Laundries Power Plants Hotels, Restaurants Ice plant

Pollution Control Systems is recognized worldwide for its products and technologies to treat wastewater to a safe sanitary water effluent quality discharge meeting and/or exceeding effluent standard.The selection of a packaged wastewater treatment plant offers the user a pre-engineered and pre-fabricated method of treating wastewater with an aerobic process. The final effluent can be released safely into the environment such as receiving streams, rivers, etc. Treated non-potable water is also being used as a new source of water to promote agricultural and aquaculture production, industrial uses, water sustainability, and reclamation uses such as irrigation, wash down, and / or artificial recharge. Technologies and Processes Include Clarification Chlorination / Disinfection Extended Aeration - EA Integrated Fixed Film Activated Sludge - IFAS Membrane Bioreactor - MBR Moving Bed Bioreactor - MBBR Nitrification / Denitrification Oil / Water Separation - OWS Tertiary Treatment VANTAGES Pre-engineered, pre-fabricated structures result in lower cost Unit is easily transported to the customer’s project site Design allows for quick turnaround time for delivery and installation Wastewater Treatment System is simple to operate and requires low manpower Effective aerobic operational principal User friendly – low and easy maintenance Regulatory compliant Custom design / application specific systems Long service life Modular Systems Pre-engineered modular components such as diffused air blowers, aeration tanks, sludge holding tanks, wastewater clarifiers, and disinfection units allow for the package wastewater treatment plants to be sized specifically for the customer’s application. They can be designed to handle a variety of influent flow rates and BOD loadings to meet discharge requirements.

Specially engineered and developed for small scale industries, this Packaged Effluent Treatment Plant has an excellent capacity of treating low quantities of effluent. It employs primary, secondary & tertiary treatment in order to process the effluent. Available in both skid- mounting and non skid-mounting models, the treatment plant is technologically advanced in its function. Available As : Skid-Mounted Type Non Skid-Mounted Typ USP : Compact in size Negligible civil work involved Easy to operate and maintain Portable & modular treatment plants Quick installation Ideal for small scale industries Non Skid-Mounted Type Applications : Plating & coating industry Coolant treatment Pickling industry Paint booths Technical Specifications : Capacity: 5 cum to 50 cum Process Involved : Primary Stage- In this stage, floatable matter like grit, stones and sand is filtered out passing the raw effluent through screening and grit chamber Secondary Stage- Here, BOD/ COD is reduced by subjecting treated effluent to biological treatment Tertiary Stage- In this final stage, sand and carbon filters are employed for the removal of suspended solids and organic material

Reverse Osmosis popularly known as RO is most popular membrane filtration world wide. It is used in wide variety of applications like to produce drinking water, to reduce dissolved solids in process feed water and reduce dissolved solids in process effluents from wide range of industries. Basically RO is the reverse process of natural osmosis. In this process pressure higher than that of the natural Osmotic pressure drives the solvent towards the dilute solution. This technique when applied on water, water with low salts is produced as permeate. In water treatment applications many types of membrane materials and configuration of RO membranes are available. Features of R O Plants: Optimum water quality is produced by the TFC (thin film composite) RO membranes Very high quality imported vertical multistage, S S 316 High pressure pump are used ASME Code FRP, RO pressure vessels High Pressure and low pressure switches are provided for safe run PVC low pressure feed, product and reject piping, 316 stainless steel high pressure piping Monitoring devices and instruments are provided Equipped with suitable pretreatment User friendly Microprocessor / PLC based electrical control devices Available from 1 m/hr to 100 m/hr capacities Can be used to treat even high salinity water

Removing the dissolved iron from water, the Iron Removal Filter plays a vital role in the overall water filtration. These Iron Removal Filters are designed by incorporating the modern iron removal technique in compliance with the set industry standards. The range of our Iron Removal Filters comprises of Domestic Iron Removal Filter and Industrial Iron Removal Filter. Our Iron Removal Filter is high in demand in the industry, owing to its matchless performance and longer working life.Raw water usually contains soluble iron in form of ferrous bicarbonate and in soluble as ferric hydroxide. The water containing ferrous bicarbonate is clear when drawn from a tube well. But as soon as it comes in contact with air develops a whitish haze which on longer standing turns yellowish and then forms yellowish to reddish-brown deposits of hydrated ferric oxide; some of this deposit sticks to the side of the container and the rest sinks to the bottom. Oxidation of ferrous bicarbonate is usually accomplished by the dissolved oxygen introduced into the water by aeration as per following reaction. Process Water directly from the tube well is first passed into the aeration chamber packed with manganese base catalyst Before entering into the Aeration Chamber air is injected with water from an Air Compressor according to the above reaction iron is oxidized into ferric form water is then passed through the Iron Removal Filter packed with Catalytic Filtering Media Here the residual ferrous iron is oxidized into ferric and entire precipitated ferric hydroxide is filtered out The precipitated and entrapped ferric hydroxide is then removed from the bed during back- washing Features: Correct filtration media Feed/backwash pump Pressure vessel filled with de-ironing media Usage: For hospitals, nursing homes and others medical institutes Purpose. For Municipality water supply, Corporation Purpose For Industrial purpose like paper mills, cotton mills, Poultry Firms, Chemical plant, Pharmaceutical purpose etc.

Dual media filter contain anthracite along with fine sand reinforced by marbled and gravels. These filter consist of a coating of anthracite (1.25-2.5mm) resting on a coating of fine sand (1-1.5mm) Anthracite is coarse and has more dirt holding capacity as compared to fine sand. Dual media filters are used in places where the raw water contains suspended contaminants, turbidity and iron. Dual media filters provide very efficient particle removal under the conditions of high filtering system amount. These filters use layers of anthracite and garnet contaminants as the filter medium, with filtering system amount of 98% down to 2 microns. The dual media filters employ an automatic backwashing feature, which employs a variety of air and water to maintain unit efficiency. Working Principle: The media in a dual or multi-media filter are arranged so that the water moves through media with progressively smaller pores. The largest particles are strained out by the anthracite. Then the sand and garnet trap the rest of the particulate matter though a combination of adhesion and straining. Since the particles in the water are filtered out at various depths in a dual or multi-media filter, the filter does not clog as quickly as if all of the particles were all caught by the top layer. Advantages and Features Efficient Turbidity and TSS Removal Filter up to 20 – 30 Microns FRP, CS, MSEP, SS Vessel available ASME Pressure Vessel is also available Two, Three and Multi layer filters Low Pressure drop across the vessel Air scouring available for high flow pressure vessel Manual, Semi Automatic and Automatic features are provided Long filter cycles between backwashing with minimum loss of pressure. Pneumatic and electrical operating automatic valves Two elliptical manholes Hand-holes Automatic control and electrical cabinet. Salient Features: Dual media filters have high dirt removal capacity of the finest sand forms Dual media filters are five times more effective in removing dirt than the pressure filters Dual media filters provide very efficient particle removal under the conditions of high filtration rate. Inside a sand-anthracite filter is a layered bed of filter media Sand is used to remove the suspended particles and anthracite is used to remove the odour and colour etc. to make the water fit for different applications It also cocks-up with existing benefits of PSF and ACF Applications Drinking water filtration Effluent water filtration Swimming pool filtration Processes water filtration To remove turbidity from water For pretreatment of reverse osmosis & desalination system To remove and minimize suspended particles from the water

Dhal Engineering offers a compact and decentralized wastewater treatment solution for small, remote communities without access to the municipal sewer system. With the absence of an infrastructure with canals to the nearest municipal wastewater treatment plant and associated pumping stations, a wastewater treament on site by Dhal Engineering proves to be economically very advantageous.To enable customers to be able to transport our manufactured Sewage Treatment, Industrial Waste Water Treatment Plants, Akar Impex Private Limited manufactures a range of plants having different applications, capacities and matrerial of constructions.We manufacture Containerized Plants for waste-water Treatment for all types of applications and sizes. We provide operators room, supply all equipment, tanks and electronics also in the containers. We can supply openable containers as well as completely enclosed systems. Please contact us for details.Containerized Plants for waste-water Treatment are preferred for use at camp sites, construction sites, resorts, army camps and Government projects. Where there is a likely hood of shifting of the plants, ACONSET plants are a must.These plants come factory assembled. There is therefore no need for carrying out any installation at site. This means two things. Firstly the plant is ready for operation almost as soon as it arrives. It hardly requires any installation. The user has just to connect pipes and the plant is ready to perform. Secondly, the containerized plant has very compact foot print. The plant occupies much less space than normal. Third advantage is that there is no need to build shelters to cover the plant. Fourthly, if the buyer so desires, operators cabling is also provided with the plant within container. Automatic / manual operation Our systems are equipped both with manual as well as with a microprocessor-based monitoring and control system. This system may be remotely monitored via telephone modem. The automatic control system is equipped with manual overrides should manual control become necessary. External power operated or self generated power for plant. Standard systems are supplied with equipment operating on AC power with 440 volts 3 phase, 50 Hz cycle motors (except dosing pumps, which operate on single phase, 220 volts). The power has to be supplied from external mains electric supply to the control panel provided in the plant. On demend, Dhal Engineering can design and supply systems with diesel generators to operate all equipment installed in the plant.

The Activated carbon Filters are designed to remove free chlorine, organic matter, odour and Color present in the raw water and waste water. Due to its high degree of micro porosity, activated carbons provide a huge surface area. Activated carbon filter operates through adsorption. Adsorption is directly related to the surface area of the media. This great surface area furnishes a huge adsorption area for organic as well as chlorine molecules to attach themselves.The Activated Carbon Filters consist of Activated carbon granules supported by very fine quartz filter media. Various grades of carbon are available for specialized treatments.Filtration is the most frequently used, robust method to remove suspended solids from water. The Filter consists of a multiple layer of sand/ Filter Media with a variety in size and specific gravity. The Filters are designed to remove turbidity and suspended particles present in the feed water with minimum pressure drop.Fluid Systems offers a wide range of filters for varying applications with single/multiple media options to meet specific process requirements.We offer advanced technology Activated Carbon Filter that is used for removing oil contents in the compressed air. Our Activated Carbon Air Filter is made from the superlative raw materials due to which it has robust construction. As the result, we are recognized as one of the most eminent Manufacturers of Activated Carbon Filter System in the country. We provide optimum quality Carbon Filter at the most discounted prices in the Industry.