活性炭柱中砂垫层在微污染水源水处理工艺中的应用  

Application of sand layer in activate-carbon filter for micro-polluted source water treatment processes

作　　者：刘阳[1] 张燕[1] 

机构地区：[1]浙江大学土木工程学系,杭州310058

出　　处：《环境工程学报》2012年第11期3822-3826,共5页Chinese Journal of Environmental Engineering

基　　金：国家"水体污染控制与治理"科技重大专项(2008ZX07421-003)

摘　　要：以嘉兴市某水厂沉后水为进水进行实验,研究炭砂滤池对污染物的去除性能,以及炭砂滤池取代活性炭+砂滤池的可能性,探讨了短流程工艺的适用性。结果表明,炭砂滤池能有效去除水中的浊度、氨氮、CODMn和铁、锰等污染物,与活性炭柱相比,炭砂滤池在降低出水浊度和水中颗粒数方面具有一定优势,即砂垫层对控制出水浊度和保障微生物安全能够起到积极作用。在实验条件下,增加活性炭层厚度或者降低滤速,在一定程度上有利于提高对CODMn的去除率。在设计滤速为9～10 m/h,CODMn<4.5 mg/L时,可直接以炭砂滤池取代活性炭池+砂滤池,仍然能保证出水CODMn<3 mg/L。The experiments were carried out with the settled water of a Jiaxing water work as influent.The pollutants removal efficiency of sand/carbon filter,the possibility of using sand/carbon filter to replace activated carbon filter plus sand filter and the applicability of this short process technology were discussed.The results show that sand/carbon filter can remove turbidity,NH＋4-N,CODMn,Fe and Mn,effectively.Compared with single active carbon filter,sand/carbon filter has advantages on reducing effluent turbidity and lessening effluent particle counts.It shows that the sand layer plays a positive role on the controlling the turbidity and guaranteeing microbial safety.Under the experimental conditions,to increase thickness of carbon layer or reduce filtration velocity to some extent can improve the removal efficiency of CODMn.When filtration velocity is 9~10 m/h and sand/carbon influent CODMn4.5 mg/L,sand/carbon filter can replace active carbon filter plus sand filter,and can keep the effluent CODMn3 mg/L.

关 键 词：微污染水 炭砂滤池 砂垫层 适用性 CODMN 

分 类 号：X524[环境科学与工程—环境工程]