EFFLUENT TREATMENT PLANT (ETP) AND ITS OPERATION

TCC is producing S.O.Dyes. Most of the dyes are spray-dried with our recently commissioned Spray Dried Plant.

The waste water generated from the production process is mainly the washings of the Spray Dried Plant and the reactors, which gets collected in 25 M3 capacity RCC underground Collection Tank from this tank, the waste water is pumped to 3 X 5 M3(Meter Cube) capacity R.C.C stirred tanks, three such tanks are available in series. The waste water is checked for pH. (There are 2 X 10 M3 capacity HDPE underground tanks in reserve. In most cases, it is neutral and if not, it is corrected either with HCl or Caustic Lye depending on the pH value to get the resultant pH within 6.5 - 8.5. It is then treated with diluted Ferrous Sulphate solution and the pH is compensated to form small flocks. It is then treated with Polyelectrolyte solution to precipitate the coagulated mass. The resultant coagulated mass is then filtered in Nutsche filter. The clear liquid is allowed to flow either in underground 10 M3 HDPE tank or underground 25 M3 R.C.C tank. The contents are checked for COD. The treated waste water is aerated further by diffuse aeration system, if required.

The treated waste water, Okay in all respect, is pumped to G.I.D.C. Drainage system through clarifier containing Activated Carbon Bed.