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Water Treatment Plants

Water to be supplied for public use must be potable i.e., satisfactory for drinking purposes from the standpoint of its chemical, physical and biological characteristics. Drinking water should, preferably, be obtained from a source free from pollution. The raw water normally available from surface water sources is, however, not directly suitable for drinking purposes. The objective of water treatment is to produce safe and potable drinking water.

Water Treatment Necessity:
  • Water Shortage in large scale
  • Increase of Population
  • Rapid Industrialization

  • Water Management includes:
  • Using water efficiently
  • Conserving water
  • Using rain water harvesting systems
  • Segregation of grey and black water
  • Treatment of grey & black water to produce recycled water
  • 3R’s - Reduce, Reuse & Recycle
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    PRESSURE SAND FILTER (PSF)

    PSF are the most popular method for removal of turbidity from water. The PSF consists of multiple layer sand with a variety in size and specific gravity. These filters are designed to remove turbidity and suspended particles present in the feed water with a minimum pressure drop. These filters vary in design to suit the process & system requirements . These filters are offered in FRP , Mild Steel with Frontal Pipe Works and associated valves

    Salient Features :
  • Efficient Turbidity Removal
  • Standard & Efficient Sand Media
  • Low Pressure drop across the vessel
  • Easy to operate
  • Excellent filter quality at higher flow rate
  • Easy mounting and fast cleaning, with minimal maintenance

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    ACTIVATED CARBON FILTER (ACF)

    ACF are used for the removal of Colour & Odour from the water. It consists of multiple layer sand and activated carbon. ACF is designed to suit the process requirements and are offered in FRP , Mild Steel with Frontal Pipe Works and associated valves.

    Salient Features :
  • Easy to operate,
  • Requires least maintenance
  • Excellent filter quality at higher flow rate than conventional ones
  • Easy mounting and fast cleaning, with minimal maintenance
  • Required Less Space

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    DUAL MEDIA FILTER/MULTI MEDIA FILTER (DMF/MMF)

    Multi Media filters are used for the removal of suspended solids (turbidity) in the incoming feed water. Suspended solids consist of small particles such as silt, clay, grit, organic matter, algae and other microorganisms. It consists of multiple layer sand and antracite. These filters are designed to suit the process requirements and are offered in FRP, Mild Steel with Frontal Pipe Works and associated valves.

    Salient Features :
  • Durability
  • Simple operation
  • High performance
  • Easy installation
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    IRON REMOVAL FILTER (IRF)

    Iron removal by physio chemical way consists of iron oxidation by air followed by sand filtration.

    Oxidation can be carried out by various chemicals like chlorine, ozone but is mostly done by compressed air.

    Complex bound iron and manganese, e.g. complex bound with humic acids, can be very difficult to remove. In this case oxidation with ozone can be a solution.

    Iron removal is based on the precipitation of dissolved iron (Fe2+) into its oxidized form (Fe3+), as Fe(OH)3 or Fe2O3. Iron removal filter is processed catalytic filtration unit when the raw water passed through the layer of compressed air, processed catalyst & quartz filter media respectively. The dissolved ferrous iron salts are converted into insoluble ferric salt and precipitin over the filter bed and then the iron free filtered water comes out. Only backwashing with clear water and compressed air is required for cleaning the bed.

       
       
    FLOCCULATOR

    Flocculation is the “snowballing” of small particles into larger particles (called “floc”). It is a time-dependent process that directly affects clarification efficiency by providing multiple opportunities for particles suspended in water to collide through gentle and prolonged agitation using a flocculator. The process generally takes place in a basin equipped with a flocculator that provides agitation. This agitation should be thorough enough to encourage inter-particle contact, but gentle enough to prevent disintegration of existing flocculated particles. Particles grow by colliding with other particles, and sticking together. Detention time is necessary for the formation of floc. The longer the detention time, the larger the floc.

    Salient Features :

  • High on performance
  • High Strength
  • Durable
  • Stable & accurate stirring speed
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    CLARIFIER

    A clarifier in wastewater treatment is the primary process to separate solids and water. Clarifiers are designed in a variety of shapes, but primarily for large wastewater treatment facilities, are large circular open-air tanks where wastewater enters, usually through a center tower and the flow slows significantly thus allowing solids that are in suspension to settle to the floor. The settled solids are directed towards the center using very slow moving collection scrapers. The clearer effluent, now at the top of the tank, exits the tank usually through V-notch weirs to be further treated before being released for reclaim use or into surface water.

    Salient Features :
    • High on performance
    • High Strength
    • Durable
      
    LAMELLA CLARIFIER

    Lamella Clarifier is used for settling of flocculated raw water in water treatment plants. The system consists of a tank with inclined plates on the top portion. Lamella Clarifier is a compact, inclined plate type of clarifier. It is used for clarification of water, waste water and liquid having suspended and colloidal particles. Principle is based on settling under gravity, providing number of inclined plates to give large projected surface area.

    Salient Features :
  • Compact
  • Easy maintenance
  • No civil works
  • Majority of sludge removal
  • Easily Expandable
  • Low Capital & Operating cost


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    CLARIFLOCCULATOR


    Clariflocculator unit is a combination of both flocculation and clarification in a single tank. This unit consists of two concentric circular compartments. The inner compartment is the flocculation chamber and the outer compartment is the clarifier.

    In the clariflocculator, the water enters the flocculator, where the flocculating paddle enhances flocculation of the feed solids. As heavy particles settle at the bottom, the liquid flows radially upwards in the clarifier zone. The clarified liquid is discharged over a peripheral weir into the peripheral launder. The deposited sludge is raked to the bottom near the central weir from where it is routed to the sludge chamber.

    Salient Features :
    • Turnable arrangement mounted on concrete center column, supporting scraper mechanism
    • The scraper mechanism is made up of steel which consists of central drive cage, scraper arms and blades
    • It is provide with syphon feed arrangement through concrete center column and feed well
    • It is provided with automatic overload trip arrangement to protectmechanism against accidental overloads
    • Available from 10m to 40 m diameter
    • The peripheral drive consists of TEFC motor, double - stage worm reduction gear and a chain drive

      
     

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