摘要
采用絮凝-酸析-电解-活性污泥工艺对宣纸废水进行处理,结果表明:絮凝段,pH值为9.8、聚合硫酸铝絮凝剂的最佳用量为50mg/L;酸析段,对絮凝处理出水进行处理,最佳pH值为4.0;电解段,处理酸析处理出水,电解质KMnO_4最佳用量200mg/L、电解80min时,色度去除率达到82.4%,处理出水色度为32倍,但出水COD_(Cr)仍很高,废水的可生化性大大提高;活性污泥段,电解出水稀释3.1倍时,处理后出水COD_(Cr)为178.4mg/L。
In this experiment, flocculation - acid precipitation - electrolytsis - activated sludge process is used to treat the black liquor from Xuan Paper Production. The result shows： 1） in flocculation stage, the optimal pH is 9.8, the dosage of polymeric aluminum floculant sulphate is 50mg/L; 2） in acid precipitation stage, the effluent from the flocculation stage is treated, the suitable pH is 4.0; 3） the effluent from acid precipitation stage is continuously treated in electrolysis stage, the electrolyte is potassium permanganate and its dosage is 200 mg/L, the time of electrolysis is 80 min, the removal rate of chroma is 82.35 %, the chroma in the effluent is 32 times. Although the concentration of CODcr is still high, the biodegradability of the treated wastewater is improved; 4） in the stage of activated sludge process, when the influent is diluted by water with the ratio of 3 to 1, the concentration of CODcr in effluent is 178.36mg/L. The chroma in final discharged water meets the requirement of A level of ＂The integrated wastewater discharge standard＂, CODcr meets the B level of it.
出处
《中国造纸学报》
EI
CAS
CSCD
2007年第3期45-47,共3页
Transactions of China Pulp and Paper
基金
安徽省教育厅科研项目(2001kj035)。
关键词
宣纸废水
絮凝
酸析
电解
活性污泥法
wastewater from Xuan paper production
flocculation
acid recovery
electrolytic method
activated sludge process
