FERTILIZER PLANT LIQUID EFFLUENTS (CHEMICAL WASTE) TREATMENT AND RECOVERY

Abstract

The continuous cooling tower blowdown effluents discharged from the cooling tower have significantly high amounts of phosphate levels, Chemical Oxygen Demand (COD) and Biological Oxygen Demand (BOD). These amounts are not in accordance to the standards of Government of Pakistan as mentioned in NEQs (National Environmental Quality Standards) and the effluent is discharged into Arabian sea causing eutrophication. This project’s purpose is to design an effluent treatment process for the effluents from Fauji Fertilizer Bin Qasim Limited (FFBL). The process includes equalization and neutralization (for flow and pH control), membrane bioreactor (for COD and BOD removal), CSTRs for reactions, settling tank and a belt conveyer dryer. After the processing of the effluent, the phosphate levels, COD and BOD are brought down to required NEQ standards.