化学生物絮凝与化学絮凝工艺处理城市污水--加药量对污染物去除效果的影响

化学生物絮凝工艺是利用将化学和生物协同絮凝作用处理污水的强化一级新工艺.试验通过在不同加药量情况下化学生物絮凝和化学絮凝工艺的中试试验对比研究,得出在相同加药量条件下,化学生物絮凝污染物去除效率均优于化学絮凝工艺10%～20%.在70 mg/L液体聚合氯化铝铁复配0.5 mg/L PAM的加药条件下,化学生物絮凝工艺经过30 min的水力停留时间,在进水CODCr为100～260 mg/L,TP为2～4 mg/L,SS为80～150 mg/L,NH3-N为10～25 mg/L条件下,出水CODCr、TP、SS、NH3-N满足城镇污水处理厂污染物排放二级标准.

Pilot plant research on chemical-biological flocculation and chemical flocculation process for the treatment of municipal wastewater

The chemical-biological flocculation process was an emerging effective primary treatment process, with a compact integration of chemical flocculation and biological flocculation technology. From the pilot plant experiments, it is indicated that a marginal 10~20 percent removal for chemical-biological flocculation process can be obtained in comparison with the chemical flocculation process alone at the same amount of flocculant and coagulant. With the dosage of 70 mg/L PAFC plus 0.5 mg/L PAM, and influent COD_ Cr 100~260 mg/L, TP 2~4 mg/L, SS 80~150 mg/L, and NH_3-N 10~25 mg/L, the effluent thus obtained using the chemical-biological flocculation process can meet the discharge standard of pollutants for municipal wastewater treatment plant (GB 18918-2002) at a HRT of 30 min.