混凝沉淀-复合式生物反应器处理乳品废水的研究  

Dairy wastewater treatment with coagulation-sedimentation-hybrid bioreactor process

作　　者：赵庆良[1] 李亚强[1] 刘志刚[1] 崔福义[1] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090

出　　处：《黑龙江大学自然科学学报》2006年第1期6-11,共6页Journal of Natural Science of Heilongjiang University

基　　金：哈尔滨市环保局科技攻关项目

摘　　要：乳品废水排放量大,易于造成有机污染。采用混凝沉淀-复合式生物反应器(HBR)工艺对某实际乳品废水分别开展小试和生产性试验研究。小试研究结果表明,采用聚合氯化铝作为混凝剂,当投加量为200～300mg·L-1时,对乳品废水COD和SS的去除率可分别达到50%～65%和80%～95%,影响混凝效果的主要因素是原水水质;对经过混凝沉淀处理后的废水进一步用复合式生物反应器处理,当COD负荷率为2.9kgCOD/m3·d时,系统出水满足《污水综合排放标准》(GB8978-1996)中的一级排放标准要求。对基于小试研究所提出的实际废水处理流程的生产性试验研究结果表明,采用该工艺处理乳品废水运行稳定且耐冲击负荷。Dairy wastewater may cause severe organic pollution owing to its great amount of discharge and existence of organic pollutants. In order to find an effective way to treat this kind of wastewater, both lab - scale and full - scale studies were conducted for the proposed coagulation - sedimentation - hybrid bioreactor （ HBR ） process fed with actual dairy wastewater, respectively. The results from lab - scale study indicated that the removal of COD and SS were 50% -65% and 80% - 95%, respectively, when polyaluminium chloride （PAC） with dosage of 200- 300 mg · L^-1 was used as coagulant. The major influence factor was found to be from wastewater characteristics. When the effluent from coagulation - sedimentation was further treated in the subsequent HBR at a COD load rate of 2.9 kgCOD/m^3 · d, the final effluent could meet the Grade I criteria of the Integrated Wastewater Discharge Standard （ GB8978 - 1996）. Based on the results above, a full - scale dairy wastewater treatment plant was constructed. The results from the full - scale study showed that the process had such advantages as good effluent quality, stable operation and resistance to shock loading.

关 键 词：乳品废水 混凝 复合式生物反应器(HBR) 性能 

分 类 号：X505[环境科学与工程—环境工程]