厌氧氨氧化耦合部分反硝化处理低浓度氨氮废水  

Treating low-nitrogenous wastewater by coupling anammox with partial denitrification

作　　者：陈国燕[1] 彭党聪[1] 李惠娟 姚倩[1] 孙红方 CHEN Guoyan;PENG Dangcong;LI Huijuan;YAO Qian;SUN Hongfang(School of Environmental and Municipal Engineering,Xi＇an University of Architecture and Technology,Xi＇an 710055,China;School of Environmental and Chemical Engineering,Xi＇an Polytechnic University,Xi＇an 710048,China;Xi＇an Sewage Treatment Co.Ltd.,Xi＇an 710086,China)

机构地区：[1]西安建筑科技大学环境与市政工程学院,西安710055 [2]西安工程大学环境与化学工程学院,西安710048 [3]西安市污水处理有限责任公司,西安710086

出　　处：《环境工程学报》2018年第7期1888-1895,共8页Chinese Journal of Environmental Engineering

基　　金：陕西省住房城乡科技开发项目(2015-K65)

摘　　要：通过接种厌氧氨氧化菌(Candidatus Brocadia)与部分反硝化菌(Thauera)形成厌氧氨氧化与部分反硝化耦合处理模拟城镇污水中的氨氮(NH_4^+-N)与硝氮(NO3--N),考察不同NO3--N/NH_4^+-N比对耦合系统脱氮性能的影响及最佳NO3--N/NH_4^+-N比下耦合系统的稳定性和脱氮的途径。结果表明:在COD/NO3--N为2.5、NH_4^+-N浓度为20~40 mg·L^(-1)的条件下,NO3--N/NH_4^+-N比在0.8~1.6的范围内均可实现部分反硝化与厌氧氨氧化协同脱氮,且当NO3--N/NH_4^+-N比为1.2时,耦合效果最佳,对应的NH_4^+-N、NO3--N及总氮(TN)去除率分别为92.85%、99.68%和96.42%;厌氧氨氧化菌在耦合系统中的活性稳定在(4.62±0.44)mg·(g·h)-1(以VSS计),且与反硝化菌存在协同竞争关系,进水NO3--N的84.3%由厌氧氨氧化途径去除,15.7%由异养反硝化途径去除。The coupling of anammox and partial denitrification by seeding Candidatus Brocadia anammoxidans and Thauera genera was applied for simultaneous ammonium（NH4＋-N） and nitrate（NO3--N） removal in this study. Effects of different influent NO3--N/NH4＋-N ratios on the process stability and nitrogen removal pathway were investigated. The results indicated that the coupling system was established successfully when the influent NO3--N/NH4＋-N ratios ranged from 0.8 to 1.6 under the influent COD/NO3--N ratio of 2.5, NH4＋-N of 20 to40 mg·L-1. The optimal ratio of NO3--N/NH4＋-N was 1.2, and the removal efficiencies of NH4＋-N, NO3--N and TN（total nitrogen） were 92.85%, 99.68% and 96.42%, respectively. Anammox bacteria could cooperated smoothly with denitrifying bacteria in the coupling process and maintained a stable activity of（4.62±0.44） mg·（g·h）-1（counted as VSS）. The relationship between heterotrophic denitrification and anammox was cooperative and competitive in the system while 84.3% of the total NO3--N in the influent was removed by anammox and the rest of 15.7% by denitrification based on the mass balance.

关 键 词：厌氧氨氧化 部分反硝化 厌氧氨氧化菌 低浓度氨氮废水 脱氮 

分 类 号：X703.1[环境科学与工程—环境工程]