BIOCHEMICAL TREATMENT OF CHEMICAL FIBER WASTWATER BY AN AIRLIFT TYPE CIRCULATING REACTOR

The bio-chemical treatment of chemical fiber airlift type circulating reactor was studied.It was shown that,under the conditions of air flow of 0.32m3/h,HRT7.0 and pH 8.5～9.0,the COD degradation speed of chemical fiber wastewater was the quickest.COD removal rate could reach to over 93%.In addition,properly adding phosphorus is advantageous to COD degradation in chemical fiber wastewater.The reactor operated continuously for 30d,the effluent COD and NH3-N lowered to below100 mg/L and 10mg/L respectively,reaching the national first class discharge standard of chemical fiber wastewater.