Effluent Treatment

Effluent Treatment

In the new world scenario of increased awareness of about pollution, the chemical industries are becoming direct target off Environmental Institutions. Such is the burden from Government and Non government organisation that an industry has to develop means of waste disposal even before starting up the process.

Effluent treatment is required for the waste disposal. Flammable materials can be disposed off by burning in the flare. Special incinerators are installed to avoid air pollution.

Small amount of nonflammable liquid or solid waste can be disposed of by dumping or burial at approval pits. The disposal of toxic waste is controlled by legislation.

Also, legislation controls the disposal of aqueous of organic waste to public sewers and surface water. Strict controllers are placed on the nature of the effluent that can be discharged.

The treated water specification as per Maharashtra Pollution Control Board are as follows.

1) pH    5.5 to 9.0

2) Suspended solids Max 100 ppm

3) BOD Max 30 ppm

4) COD Max 250 ppm

5) OILandGrease     Max 10 ppm

5)      Dissolved solids Max 1500 ppm

6)         Dissolved oxygen Max 5 ppm

Total metal                              :         1 ppm

Cyanide                                 :        1 ppm

Bioassay test on fish           :        <0.2 ppm

Survival for 96 hrs.             :        90%

Gaseous effluent that contains toxic substance will need treatment before being discharge to the temp, or must be discharged from stacks tall enough to dilute and dispose the effluent harmlessly; scrubbing, filtration or using electrostatic ppt can remove gaseous pollution. As the process is a yap phase process and the raw material used is a flammable. Therefore the gases, which are vented during the process, are taken to the flare for burning.