分散型城镇污水处理组合工艺效果评价与研究  

Assessment and Research on Sewage Treatment Combined Process for Dispersible Town in the Three Gorges Reservoir Region

作　　者：白一力[1] 敖亮[1] 周谐[1] 陈建[1] 

机构地区：[1]重庆市环境科学研究院,重庆401147

出　　处：《环境科学与技术》2015年第7期103-107,共5页Environmental Science & Technology

基　　金：主城建成区湖库污染整治工程可行性研究报告项目;三峡库区消落带生态系统演变关键过程;机理及环境效应(cstc2012jj B20003);国家水体污染控制与治理科技重大专项(2012ZX07104-003);重庆市自然基金科学基金(2012cstc-jbky-01603)

摘　　要：该文以三峡库区小城镇分散型污水处理厂——万州白羊镇污水处理厂为研究对象,该厂采用前端厌氧、好氧处理加末端人工湿地处理的组合工艺,通过对厌氧、好氧、人工湿地三段出水的长期监测,评价各段水质处理效果,研究污染物主要去除方式。结果发现,组合工艺对BOD5、COD、NH3-N处理效率超过90%,SS降解效率为75%,TN在运行稳定后去除效率为85%,运行以后改善了水环境质量,削减了三峡库区入库负荷。分阶段研究表明,污染物最大去除效率值稳定在厌氧-好氧阶段,而湿地处理末端尾水存在较大的季节性差异,在温度较低的秋冬季节较差,而在春夏季节有较为明显的提高。因此,为保障污水稳定处理效果,建议今后小城镇分散污水处理项目应加强前端厌氧-好氧设施的优化设计,而非仅仅依赖湿地。Baiyang Town Sewage Treatment Plant for diffused sewage in the Three Gorges area was chosen as research object, with the combined process as anaerobic-aerobic-constructed wetland. After long-time monitoring for different processes, treatment effects were assessed for pollutants removing. The results showed that BODs, COD and NH3-N treatment efficiency of the combined process were all more than 90%, with SS for 75% and TN for 85% after stable operation. Different process monitoring indicated the pollutants were mainly removed in anaerobic-aerobic process. The constructed wetland was fit for tail water which has obvious seasonal differences with low efficiency in autumn-winter and high in spring-summer. So in order to keep stable wastewater treatment efficiency, it is suggested the construction of anaerobic-aerobic facilities should be preferably intensified rather than relying solely on the wetland.

关 键 词：三峡库区 分散性污水 厌氧-好氧-人工湿地 

分 类 号：X522[环境科学与工程—环境工程]