Dyeing wastewater treatment with immobilized microorganism technology

The dyeing wastewater in the pilot-scale experiment was investigated based on the technologies of hydrolysis/acidification/aerobic,which focused on the microorganism immobilization on macroporous car- riers.The result showed that when chemical oxygen demand(COD_(Cr))in the wastewater varied from 1.0～1.2 g/L,and the hydraulic retention time was 20 h,the effluent quality reached the first discharge standard specified in GB 8978—1996.In a hydrolytic/acidification reactor,the COD_(Cr)load could reach 1.7 kg/(d·m~3) and the removal rate was 44%,and the COD_(Cr)load could reach 1.9 kg/(d·m~3)and the removal rate was 83% in an aeration reactor.A dynamics mathematical model for the degradation of dye wastewater was established.