Biotreatment of high strength toxic petrochemical (i.e. acrylonitrile) waste water to reduce cod and cyanide

Bio treatment a high strength toxic petrochemical (acrylonitrile) waste water to reduce COD and cyanide. Among the waste water generated in petrochemical industry, the process waste water stream generated during the manufacturing of acrylonitrile are considered to be one of the most toxic as they can take cynides are extremely harmful to lives on earth including human and can cause irreparable damage to environment. Biological degradation of the high strength toxic petrochemical waste water using laboratory scale immobilized cell bio reactor (immobilized cells act as bio catalyst – 4% sodium alginate beads in 0.85% saline, containing 4.6 mg/ L of mixed culture. This was added dropwise to 2.0 M cacl2 solution and each drop hardened in to a bead containing entrapped cells. The beads were allowed hardened further in cacl2 solution at 5 0 c for 24hr. COD reduction was measured for various organic loading.