污泥厌氧产酸发酵液作碳源强化污水脱氮除磷中试研究  

Enhanced Nitrogen and Phosphorus Removal of Wastewater by Using Sludge Anaerobic Fermentation Liquid as Carbon Source in a Pilot-scale System

作　　者：罗哲[1] 周光杰[1] 刘宏波[1] 聂新宇 陈宇 翟丽琴 刘和[1] 

机构地区：[1]江南大学环境与土木工程学院,无锡214000 [2]无锡市高新水务公司,无锡214000

出　　处：《环境科学》2015年第3期1000-1005,共6页Environmental Science

基　　金：江苏省太湖水环境综合治理科研课题项目(JSZC-G2013-191);江苏省环境保护厅科研课题项目(2012035);国家自然科学基金青年基金项目(51208231)

摘　　要：为研究城市污泥厌氧产酸发酵液作为补充碳源强化生活污水脱氮除磷系统的效果和可行性,建造了一个总有效体积为4 660 L的A2/O中试反应系统,以实际城市污水为研究对象,考察了添加污泥产酸发酵液后的污水脱氮除磷效果并和单纯添加乙酸作碳源的效果进行了比较.结果表明,在进水COD为243.7 mg·L-1、NH+4-N为30.9 mg·L-1、TN为42.9 mg·L-1、TP为2.8 mg·L-1、硝化液回流比为200%和污泥回流比为100%的条件下,向缺氧池中投加乙酸能增强系统脱氮除磷效果,反应器的最佳进水流量和投加碳源SCOD增量分别为7 500 L·d-1和50 mg·L-1.污泥发酵液代替乙酸作为外加碳源时的平均出水COD、NH+4-N、TN和TP去除率分别为81.60%、88.91%、64.86%和87.61%,相对应的出水浓度分别为42.18、2.77、11.92和0.19 mg·L-1,满足我国《城镇污水处理厂污染物排放标准》GB 18918-2002所规定的一级A标准.结果表明,投加污泥产酸发酵液作为脱氮除磷碳源可达到和乙酸同样的效果,具有实际可行性,这为城市污泥处理处置实现资源化提供了一条新的可行途径.In order to explore the possibility of enhanced nitrogen and phosphorus removal in wastewater using sludge anaerobic fermentation liquid as external carbon source,the present study proposed an A2/ O reactor system with a total effective volume of4 660 L and real municipal wastewater for treatment. The results showed that under the conditions of the influent COD at 243. 7mg·L- 1,NH+4-N at 30. 9 mg·L- 1,TN at 42. 9 mg·L- 1,TP at 2. 8 mg·L- 1,the backflow ratio of nitrification liquid at 200% and recycle ratio of sludge at 100%,the addition of acetic acid into anoxic tank could enhance the removal efficiency of nitrogen and phosphorus,and the optimal influent quantity and SCOD incremental of carbon were 7 500 L·d- 1and 50 mg·L- 1,respectively. When the sludge fermentation liquid was used as external carbon source and the average effluent COD,NH+4-N,TN,TP removal efficiency were 81. 60%,88. 91%,64. 86% and 87. 61%, the effluent concentrations were 42. 18,2. 77,11. 92 and 0. 19 mg·L- 1,respectively,which met China’s first Class( A) criteria specified in the Discharge Standard Urban Sewage Treatment Plant Pollutant( GB 18918-2002). The results of the present study demonstrated that the addition of sludge anaerobic fermented liquid as external carbon source was a feasible way to enhance the removal of nitrogen and phosphorous in municipal wastewater,providing a new feasible strategy for the reuse and recycle of sewage sludge in China.

关 键 词：中试 污泥发酵液 碳源 脱氮除磷 A2/O反应器 

分 类 号：X703.1[环境科学与工程—环境工程]