Reduction of Pollutants in Hardwood Pulp Mill Bleach Effluent

摘要

This study focused on the removal of the pollutants from high coloured hardwood kraft pulp mill bleach effluent The reduction efficiency of colour and chemical oxygen demand (COD) is evaluated at the optimum dosage of polyaluminium chloride with cationic polyacrylamide. The pollutants caused functional groups get de-linked from wastewater and which is present in treated wastewater sludge was proved through the FTIR spectrum. At the optimized pH attained from these coagulants treat the wastewater, the flocs formation/settling and the pollutant removal efficiency is encouraging and the resulting colour of the wastewater is to 55 PtCo units from 1100 PtCo units and chemical oxygen demand to 659 mg/L from 1935 mg/L.