Sewage & Effluent is a liquid waste (wastewater) generated by factories, hotels, vehicle service centers and other commercial business units. As it contains high level of BOD, COD, TSS and TDS, it puts negative effect on the water and soil. The high level of BOD significantly decreases dissolved oxygen (DO) level; hence,
it puts fresh water resources in danger. In today’s scenario it is imperative to treat industrial wastewater to a level where it can be reused safely or drain out without affecting the environment. CPCB and other statuary bodies have set some guidelines for wastewater that every effluent treatment plant must follow.
Effluent Treatment Process Explained
Industrial wastewater (effluent) is treated in a number of ways; the level of treatment decides which is appropriate. Basically, there are four steps: Preliminary, Primary, Secondary and Tertiary. We providing Packaged ETP with below Process:
- Preliminary Treatment: Screening, grit and oil removal are done at preliminary treatment process.
- Primary Treatment: Primary treatment involves removal of suspended solids up to 50% and reducing BOD level up to 30%.
- Secondary Treatment: This is sometimes referred to Biological Treatment. Through biological processes, dissolved and suspended organic wastes are converted to more stable solids and removed by settling.
- Tertiary Treatment: It is the final stage which involves physical, chemical and biological processes to remove residual suspended solids and dissolved solids.