组合工艺对农村生活污水中氮磷的去除效果  

Nitrogen and Phosphorus Removal from Rural Domestic Wastewater in Combined Process

作　　者：徐芝芬[1,2] 李金城[1,3] 莫德清[2] 阙光龙[1] 李文文[1] 孙鑫[1] 苏春良[1] 黄朗妃[1] 

机构地区：[1]桂林理工大学环境科学与工程学院,广西桂林541004 [2]桂林电子科技大学生命与环境科学学院,广西桂林541004 [3]桂林理工大学广西环境工程与保护评价重点实验室,广西桂林541004

出　　处：《桂林理工大学学报》2011年第2期252-257,共6页Journal of Guilin University of Technology

基　　金：广西高校人才小高地建设“环境工程”创新团队资助计划项目(桂教人[2007]71);桂林市科技局科技开发项目(20100126-2);广西教育厅科研项目(201010LX172)

摘　　要：利用"厌氧生物反应器+潜流复合型人工湿地"组合工艺处理农村生活污水中氮和磷。厌氧生物反应器和潜流复合型人工湿地水力停留时间分别为24和48 h,进水总氮、氨氮和总磷分别为10.3～51.8 mg/L、6.8～44.7 mg/L和0.9～5.2 mg/L,组合工艺对总氮、氨氮和总磷的平均去除效率分别为30.7%、42.9%和72%,不同季节处理效率为:夏季>春季>冬季。组合工艺中的COD主要由厌氧水解酸化、基质截留、微生物代谢而被去除,氮主要由人工湿地微生物作用和植物吸收被去除,磷主要由人工湿地基质吸附被去除。系统整体脱氮效果的提高可采用在厌氧生物反应器后增加充氧装置,提高污水中的溶解氧,通过增强人工湿地中的硝化能力来实现。Nitrogen and phosphorus removal by ＂Anaerobic bioreactor ＋ Subsurface horizontal-flow compound wetland＂ for rural sewage treating is studied. The total nitrogen varies from 10. 3 to 51.8 rag/L, ammonia from 6. 8 to 44. 7 rag/L, while total phosphorus ranges from 0. 9 to 5.2 mg/L in rural domestic wastewater. At anaerobic bioreactor＇s HRT of 24 h and artificial wetland＇s HRT of 48 h, the average removal efficiency for TN, ammonia and TP are 30. 7% , 42. 9% and 72. 3%, respectively. The treatment performance ranks in a descending order as following： summer, spring and winter. The major mechanism for COD removal in combined technology is hydrolisis acidification, matrix interception and microorganism metabolism. The total nitrogen is mainly removed through microorganism function and plant absorption in artificial wetland, while the total phosphorus mainly through matrix absorption. In order to improve the overall TN removal we can set an oxygenation equipment after anaerobic bioreactor, which can improve DO in wastewater and increase the nitration ability in artifi- cial wetland.

关 键 词：组合工艺 农村生活污水 脱氮除磷 

分 类 号：X703[环境科学与工程—环境工程]