校园污水的初级絮凝处理研究  

Research on process of campus sewage by primary flocculation

作　　者：陈彰旭[1] 张益[1] 程青青[1] 李星星[1] 陈秀云[1] 王晓冰[1] 

机构地区：[1]莆田学院环境与生物工程学院,莆田351100

出　　处：《化工新型材料》2015年第5期243-246,共4页New Chemical Materials

基　　金：国家自然基金青年基金(21103095;2012J01396);福建省高校服务海西建设重点项目(2009HX11);福建省教育厅A类项目(JA12288);莆田市科技计划项目(2012G05);莆田学院教改项目(JG201304)

摘　　要：分析测定我校污水的浊度、pH值、COD值和TSS等,通过单一使用聚合氯化铝(PAC)、单一使用壳聚糖(CS)、复合使用聚合氯化铝/壳聚糖(PAC/CS)3种方式考察体系pH值、搅拌速率、静置时间等因素处理校园污水效果进行对比研究;正交试验结果表明最佳絮凝工艺为:在校园污水体系pH值为7.0,聚合氯化铝的投加量为80mg·L-1,壳聚糖的用量为20mg·L-1,搅拌速率为50r·min-1,静置时间为5min时,对污水处理得到较为满意的效果,浊度去除率为94.1%、COD的去除率为92.8%、悬浮固体物总量(TSS)去除率为93.5%、残留铝含量为0.146mg·L-1。另外,还对PAC/CS絮凝处理机理作了初步探讨。该研究具有较好的理论研究价值和经济效益。The turbidity,pH value,chemical oxygen demand（COD）and total suspended solids（TSS）of campus sew- age were determined firstly. As a control group,polyaluminium chlorlde（PAC）and ehitosan（CS）were singly selected to co- agulating sewage, then the cooperated flocculation of PAC/CS was further investigated, The influence of the factors such as pH value of solution,mixing speed and laying-aside time on the process of sewage were studied. The orthogonal experiment indicated that the optimal conditions：the pH value of solution was 7.0,the dosage of PAC and CS were 80mg · L-1 and 20mg · L-1 ,respectively^stirring rate was 50 r· min-1 ,aging time was 5rain,and removal rates of COD,turbidity and TSS were 92.8 %, 94.1 % and 93.5 %, respectively,the residual aluminium was 0. 146mg · L-1. Finally, the mechanism of floe- culation with PAC/CS was also discussed,which had certain theoretical meaning and good economic benefits.

关 键 词：正交试验 聚合氯化铝 壳聚糖 絮凝 

分 类 号：X703[环境科学与工程—环境工程]