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| Startup strategies of CANON process in wastewater treatment plant |
| LI Dong1, ZHAO Shi-xun1, WANG Jun-an2, ZHU Jin-feng1, GUAN Hong-wei1, ZHANG Jie1,3 |
1. Key Laboratory of Beijing Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China;
2. Technology Research and Development Center, Beijing Sander Environmental Group, Beijing 101102, China;
3. State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China |
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Abstract Lab-scale completely autotrophic nitrogen removal over nitrite (CANON) process was operated in Municipal Waste Water Treatment Plant (WWTP). The tests leading to two started strategies of CANON filter, R1 was filled with filler with matured ANAMMOX bacteria and inoculated nitrite flocculent sludge, R2 started with mixing nitrification filter and anaerobic ammonium oxidation filter with weight ratio of 2:1. The inlet water of R1 and R2 was domestic sewerage after the A/O phosphorus removal treatment and keeping the temperature between 15~21degree and ammonia nitrogen concentration within 35~55mg/L. The R1 and R2 made use of 37d and 19d to keep ammonia removal rate stable at 95%. After operated 100d, the effluent of reactor almost did not contain ammonia and the maximum effluent total nitrogen concentration of R1 and R2 was 15.8mg/L and 12.1mg/L because of excessive proliferation of NOB. Specially the more worse of R1, and effluent of R2 met the first level A emission standards. The start-up strategy of mixed media reduced two thirds of the amount used in the anaerobic ammonium oxidation filter media, accelerated the start-up of the reactor, inhibited the activity of nitrite oxidation better, and achieved the long-term nitrogen emission standards.
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Received: 30 April 2017
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