Enhanced nitrogen removal and microbial analysis in partially saturated constructed wetland for treating anaerobically digested swine waste water  

作　　者：Zhenfeng Han Ying Miao Jing Dong Zhiqiang Shen Yuexi Zhou Shan Liu Chunping Yang 

机构地区：[1]State Key Laboratory of Environmental Criteria and Risk Assessment,Chinese Research Academy of Environmental Sciences,Beijing 100012,China [2]College of Environmental Science and Engineering,Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University),Ministry of Education,Changsha 410082,China [3]College of Environmental Science and Engineering,Chang5an University,Xi'an 710061,China [4]Beijing Municipal Research Institute of Environmental Protection,Beijing 100037,China

出　　处：《Frontiers of Environmental Science & Engineering》2019年第4期57-67,共11页环境科学与工程前沿（英文）

基　　金：the National Scientific and Technological Supporting Project, China (No. 2012BAJ21B01 -02);the National Natural Science Foundation of China (No. 51508538);the China Postdoctoral Science Foundation (No. 2012M520351);the Beijing Natural Science Foundation (No. 8164054);the Beijing talented backbones program (No. 2015000021733G171) for their financial support.

摘　　要：Nitrogen removal of wastewater containing high-strength ammonium by the constructed wetlands (CWs) has been paid much attention. In this study, the ability of a partially saturated CW to treat anaerobically-digested decentralized swine wastewater under varying operating parameters from summer to winter was investigated. The partially saturated CW achieved better NH4^+-N and TN removal by tidal flow than intermittent flow. With surface loading rates of 0.108, 0.027, and 0.029 kg/(m^2·d) for COD, NH4^+-N, and TN, the partially saturated CW by tidal operation achieved corresponding removal efficiencies of 85.94%, 61.20%, and 57.41%, respectively, even at 10℃. When the rapid-adsorption of NH4^+-N and the bioregeneration of zeolites reached dynamically stable, the simultaneous nitrification and denitrification in the aerobic zeolite layer was observed and accounted for 58.82% of the total denitrification of CW. The results of Illumina high-throughput sequencing also indicated that nitnfiers (Nitrospira and Rhizomicrobiurri) and denitrifiers (Rhodanobacter and Thauera) simultaneously existed in the zeolite layer. The dominant existence of versatile organic degraders and nitrifiers/denitrifiers in the zeolite layer was related to the removal of most COD and nitrogen in this zone. The contribution of the possible nitrogen removal pathways in the CW was as follows: nitrification-denitrification (86.55%)>substrate adsorption (11.70%)>plant uptake (1.15%)>microbial assimilation (0.60%).

关 键 词：Constructed WETLAND Decentralized SWINE wastewater Biozeolite Simultaneous NITRIFICATION and DENITRIFICATION Nitrogen removal pathway 

分 类 号：T[一般工业技术]