Effluent Treatment PLant For Automobile Industry

Automobile industry is a fast growing one as masses long for commuting comfort and there is seen a rise in production of automobiles of various types. The downside of such mass production, there is an increased release of wastewater and highly contaminated effluent, into the environment, which is clearly a challenge that needs to be checked.
Type Of Pollutants: The automobile industry incorporates heavy dose of clean water, which it needs for various purposes at different stages of production, such as washing, rinsing, treatment of automobile parts, paint and so forth. As such, its effluent is mostly seen with pollutants such as oils, grease, metals, chunks of paints, phosphates, detergents, ammonia bi-fluoride, hydrofluoric acid etc alongside some organic pollutants and BOD and COD as well. 
Treatment Procedure: To implement a prolific effluent treatment plant for automobile industry, effluent treatment begins with water going to drain but an environment friendly technique is relied upon comprising 4 steps.
1) Pre-Treatment: here screening tanker or grit chamber is used to take out the big solids present in effluent and such is done in order to prevent any significant damage to pump or other equipments of plant. It also has oil and grease trap to procure oil and greasy contents present in effluent. 
2) Primary Treatment Stage: Here, primary tank accepts the effluent after the pre-treatment schedule is over and in this tank, coagulation, flocculation and neutralization process are initiated so as to enable heavy objects to settle down (called primary effluent) while the wastewater is allowed to flow down for next level of treatment.
3) Secondary Treatment: At this point, effluent/ wastewater is subjected to biological treatment where 90% of BOD and COD is targeted. The biological process is of 2 types, i.e. aerobic and anaerobic, depending upon nature of effluent. At most of our units, as effluent treatment plant for automobile industry, we implement anaerobic processing for effective cleaning of effluent where dissolved and suspended biological matter is extracted.