焦化废水中COD去除的研究

Research on COD Removal in Coking Wastewater

采用铁炭微电解-水解酸化-固定化高效菌-混凝技术对蒸氨后的焦化废水进行了研究,结果表明,通过微电解,B/C值由0.20提高到0.39,经水解酸化进一步提高到0.44,之后采用折流板生化反应池进行生化处理,当HRT=48 h时,CODCr由3717 mg/L降到393 mg/L,去除率达到90%左右,出水在混凝剂投加量为6 mL,pH=7,T=35℃,PAM=3 mL的最佳条件下,CODCr最终降到65 mg/L,达到污水综合排放标准一级标准。

The iron -carbon micro -electrolysis -hydrolytic acidification and immobilized highly efficient bacteria and coagulation technology were used to treat eoking wastewater after steaming ammonia. Results showed that after iron - carbon micro - electrolysis, the B/C of wastewater increased from 0. 20 to 0. 39, after hydrolytic acidification, the B/C of wastewater increased to 0. 44. Then using baffle biochemical reactor, when HRT =48 h, CODcr reduced from 3717 mg/L to 393 mg/L, the removal rate reached about 90%. Biochemical effluent under the best conditions of the coagulant dose was 6 mL, pH =7, the temperature of 35 ℃, coagulant aids dose was 3 mL, CODcr finally reduced to 65mg/L, attained the First Grade discharge standard of integrated wastewater.