The Effluent Treatment Plant consisting of following major units;

  • Equalization tank / neutralization tank
  • Air blower
  • Primary clarifier tank
  • Alum dosing tank
  • Alum dosing system
  • Lime Dosing Tank
  • Lime dosing system
  • Polymer Dosing tank
  • Polymer dosing system
  • Aeration tank with diffusers
  • Secondary clarifier tank with sludge recycle
  • Sludge drying beds
  • Chlorine contact Tank/Clarified Water Storage Tank
  • Chlorine dosing tank
  • Filter Feed Pump.
  • Pressure Sand Filter
  • Activated Carbon Filter
  • Reverse Osmosis (Stage I)
  • Reverse Osmosis (Stage II)

Process

    • The effluent from all the process involved in the industry is first collected in Equalization Tank / Neutralization tank.
    • The Equalization Tank is provided with the bar screen to remove the coarse
    • particles from the effluent & thus prevent the blockage / stoppage of the pump.
    • Since the effluent is alkaline in nature, ph correcting agent is added in Equalization Tank / neutralization tank for neutralizing the effluent with the help of dosing pump.
    • The pH is adjusted to 6.5 – 6.8
    • The neutralized effluent is then pumped with the help of effluent transfer pumps to Primary clarifier tank.
    • In Primary clarifier tank-flocculating agents like alum, polymer, & lime is added.
    • Flocs settled at the bottom of the primary clarifier tank & are then transfer to the sludge drying bed.
    • The clear supernatant from primary clarifier tank overflows to the Aeration Tank for biological treatment.
    • The oxygen required for the bacterial growth is supplied through surface aerators.
    • Mixed liquor along with degraded effluent is then overflows to the Secondary clarifier tank.
    • The clarifier unit is provided to arrest the microbial sludge leaving from the system, as a particular concentration of the MLSS is to be maintained in the Aeration Tank.
    • The sludge settles at the bottom of the clarifier tank & is pumped back with the help of sludge return pumps to the Aeration Tank to maintain required concentration.
    • In case of excess sludge in the system, the recycle pumps will be used to drain the sludge, to the sludge drying beds.
    • The clarified effluent is then treated with chlorine for the disinfection of microbes & further control of BOD, for this purpose chlorine dosing system is provided.
    • The clarified effluent is then fed to the Pressure Sand Filter & Activated Carbon Filter with the help of Filter Feed Pump.
    • Then it is passed through a Reverse Osmosis Unit (Stage I) and the treated water is collected in a common tank.
    • The reject of the Stage I is passed through the Reverse Osmosis Unit (Stage II) to reduce the discharge effluent to Zero discharge level. The treated water is collected the same collection tank of the stage I.