乡镇污水低成本处理简易型交替曝气塘工艺  

Low Cost Wastewater Treatment in Small Towns and Rural Areas by Simply-Constructed Alternate Aerated Ponds

作　　者：王晟[1] 徐祖信[1] 杨彬彬 李怀正[1] 

机构地区：[1]同济大学环境科学与工程学院,上海200092 [2]上海千年工程建设咨询有限公司,上海201108

出　　处：《同济大学学报（自然科学版）》2010年第12期1781-1786,共6页Journal of Tongji University:Natural Science

基　　金：上海市科学技术委员会攻关项目(07dz12048)

摘　　要：针对乡镇污水处理需求,以Unitank和三沟式氧化沟的工艺为基础,整合曝气塘工艺的优点,提出一种简易型交替曝气塘工艺.结果表明,边池是交替式曝气塘完成脱氮除磷过程的关键单元,其效果必须通过对边池进水量与曝气量的恰当设定来实现.优化的控制模式,即反应周期T为6h,边池进水量/中池进水量(RQ)为2,总曝气时间/总进水时间(RA/Q,total)为1和边池曝气时间/进水时间(RA/Q,side)为0.5,既能够维持污泥浓度稳定和污泥活性,又能使脱氮和除磷的矛盾取得平衡,出水优于《城镇污水处理厂污染物排放标准GB18918—2002》一级B排放标准.近两年的工程实践证明:简易型交替曝气塘污水处理工艺具有基建投资低、施工简易、运转灵活及占地较小的优点,是适用于乡镇的一种简易加强型污水处理技术.A simply-constructed alternate aerated pond was proposed based on the integration of Unitank,tri-channel oxidation ditch and aerated pond.Results show that the side tank plays key role in denitrification and dephosphorization,and the ideal performance can only be achieved by artful setting for inflow and aeration in side tank.Under the optimized control mode,cycling time=6h,ratio of inflow-side tank to inflow-middle tank=2,ratio of aeration time to inflow time for the whole system=1,and ratio of aeration time to inflow time for side tank=0.5.Running by this mode can maintain the activity and concentration of sludge,and attain a good balance of denitrification and dephosphorization,so that effluent reached Level-1 B of China＇s Discharge standard of pollutants for municipal wastewater treatment plant.By two years＇ full scale operation,simply-constructed alternate aerated pond is proved to be a useful method for water pollution control in Chinese rural towns with its advantages of low cost,simple maintenance and good effluent quality.

关 键 词：乡镇 脱氮 除磷 简易型交替曝气塘 

分 类 号：X703.1[环境科学与工程—环境工程]