复合型生物絮凝剂处理低温低浊水  

Treatment of low temperature and low turbidity water by compound bioflocculant

作　　者：李立欣[1,2] 马放[1] 刘彦军[2] 

机构地区：[1]哈尔滨工业大学城市水资源与水环境国家重点实验室,哈尔滨150090 [2]黑龙江科技学院资源与环境工程学院,哈尔滨150027

出　　处：《黑龙江科技学院学报》2012年第2期107-110,共4页Journal of Heilongjiang Institute of Science and Technology

基　　金：国家高技术研究发展计划(863计划)项目(2009AA062906);国家自然科学基金委员会创新研究群体科学基金项目(51121062);黑龙江省教育厅科学技术研究项目(12513088)

摘　　要：针对处理低温低浊水时残余铝过高及浊度难去除的问题,采用复合型生物絮凝剂(CBF)处理低温低浊水源水,通过L16(45)正交实验研究了复合型絮凝剂投加量、pH、助凝剂Ca2+投加量、沉降时间和混凝水力条件5个因素对絮凝效果的影响。结果表明,浊度及铝去除率的影响因素均为:pH>水力条件>沉降时间>助凝剂Ca2+投加量>絮凝剂投加量。浊度去除率和铝去除率最佳的絮凝条件:絮凝剂投加量为10 mg/L;助凝剂Ca2+投加量为1.5 mg/L;pH为8.0;水力条件为搅拌速度160 r/min,搅拌时间为40 s;沉降时间为30 min。此时浊度去除率达到88.34%,残余Al去除率为92.43%。研究为应用CBF处理低温低浊水提供了基础数据和技术支持。In view of higher concentration of residual Al and difficulty to remove turbidity when dealing raw water with low temperature and low turbidity,compound bioflocculant（CBF） was used to treat the low temperature and low turbidity raw water by orthogonal experiments.The effects of CBF dosage,coagulation aid（CaCl2） dosage,pH,hydraulic conditions of coagulation and sedimentation time were studied on the removal rate of turbidity and aluminum by L16（45） orthogonal design.The results showed that the order of the factors affecting the removal rate of turbidity and aluminum from strong to weak was pH,hydraulic conditions of coagulation,sedimentation time,coagulation aid（CaCl2） dosage and CBF dosage.The optimum conditions for flocculation were that CBF dosage 10 mg/L,coagulation aid（CaCl2） dosage 1.5 mg/L,pH 8.0,hydraulic conditions of coagulation： the stir speed 160 r/min,the stir time 40 s,sedimentation time 30 min by the analysis and verification experiments,when the removal rate of turbidity and aluminum was 88.34% and 92.43% respectively.The results provide basic data and technical support for treating low temperature and low turbidity water by CBF.

关 键 词：复合型生物絮凝剂 低温低浊水 正交实验 

分 类 号：X522[环境科学与工程—环境工程] TU991.2[建筑科学—市政工程]