The startup of CANON process by starting up simultaneous anammox and denitrification process firstly
LI Dong1, YANG Qiao-yun1, ZENG Hui-ping1, ZHANG Jie1,2
1. Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China;
2. State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
In order to start up an CANON process to treat domestic wastewater, the simultaneous anaerobic ammonium oxidation and denitrification process (SAD) was started up firstly, then the ammonia-oxidizing bacteria (AOB) was enriched by Simulated domestic wastewater under low aeration. During the operation period, the variation of ammonia nitrogen (NH4+-N) nitrite nitrogen (NO2--N) and nitrate nitrogen(NO2--N )and dynamics activities of functional microbes were investigated to elaborate main factors for the conversion of sludge characteristics in the start-up process of CANON. The results showed that the time of both partial nitrification process and the adaptation to organic environment of ANAMMOX bacteria were shortened. The CANON process was started up successfully after 60days.the ANR of CANON process exceeded 93%. Owing to the short cycle, the ratio of ananmmox bacteria dynamics activity with heterotrophic denitrification bacteria was always within reasonable limits (mNH4+-N/mCOD> 1.0).The pH of reactor was improved because of the degradation of COD by heterotrophic denitrification bacteria. In addition, the selective inhibition of NOB caused by both free ammonia (FA) during the aeration period was the other main factor for stable partial nitrification.
李冬, 杨巧云, 曾辉平, 张杰. 厌氧氨氧化耦合反硝化快速启动CANON工艺[J]. 中国环境科学, 2017, 37(4): 1307-1314.
LI Dong, YANG Qiao-yun, ZENG Hui-ping, ZHANG Jie. The startup of CANON process by starting up simultaneous anammox and denitrification process firstly. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(4): 1307-1314.
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