木质素基脱色絮凝剂深度处理制浆造纸废水  

Tertiary decolorization treatment of pulp and paper effluent by using lignin-based flocculant

作　　者：乔瑞平[1] 宁银萍[2] 彭福勇[1] 杨旭[1] 孙承林[1] 

机构地区：[1]中国科学院大连化学物理研究所,辽宁大连116023 [2]大连工业大学化工与材料学院,辽宁大连116034

出　　处：《化学工程》2009年第9期48-51,共4页Chemical Engineering(China)

基　　金：中国科学院知识创新工程领域前沿项目资助(K2006C2)

摘　　要：选用聚合氯化铝(PAC)和木质素改性脱色絮凝剂(LDH)对制浆造纸废水进行了深度脱色处理研究。实验结果表明,单独使用LDH或PAC处理该废水时,废水色度和CODC r的脱除效果不理想。当PAC和LDH的投加质量浓度分别为400 mg/L和5 mg/L时,处理后废水色度和CODC r分别为33.3倍和84.88 mg/L,满足国家造纸工业水污染物排放标准。LDH具有良好的絮凝脱色和脱CODC r的能力,而且生产成本较低。采用PAC和LDH复配使用能降低投药量、提高处理效果,应用于制浆造纸工业废水深度处理的前景良好。The coagulation experiments were carried out by using lignin-based flocculant （LDH） and polyaluminium chloride （PAC） to treat the pulp and paper effluent from the secondary biochemical treatment system. The results show that LDH can exhibit higher decolorizing performance and competitive price when compared with several commercial flocculants. However, it is unfeasible to treat the effluent by using the individual flocculant. When the dosing mass concentration of PAC and LDH is 400 mg/L and 5 mg/L, respectively, the color of water treated and CODCr are 33.3 times （multiple dilution method）and 84.88 mg/L respectively, thus meeting the national standard for pulp and paper industrial wastewater drainage. LDH can exhibit higher decolorizing performance and competitive price when compared with several commercial flocculants, and especially, LDH can enhance the treatment efficiency with less dosage when used with PAC. This method provides an effective tertiary treatment process for the pulp and paper effluent treatment.

关 键 词：制浆造纸废水 混凝 脱色絮凝剂 木质素 

分 类 号：X703.1[环境科学与工程—环境工程]