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| Study on the performance of partial denitrification coupled with anaerobic ammonia oxidation for nitrogen removal |
| WANG Wei-qi, WANG Xiu-jie, LI Jun, WANG Si-yu |
| The College of Architecture and Civil Engineering, Bejing University of Technology, Beijing 100124, China |
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Abstract Based on the stable immobilizing anammox reactor, the anammox coupling with partial denitrification, called DEAMOX, was successfully achieved after 94days operation with the value of NO2-—N accumulation rate and the removal rate of NO3-—N up to 63.5% and 98.4%, respectively. The findings revealed that the optimum ranges of COD/NO3-—N for coupling reaction were 2.3~2.7. Besides, the coupling performance was weakened by the raising pH values up to 8.0 or 8.5, which was inconsistent with some published research. The immobilizing anammox further coupling whole process denitrification was achieved by adding solid carbon source of PCL into DEAMOX reactor. Subsequently, the NO3-—N produced by anaerobic ammonia oxidation could be completely removed and the removal rate of total nitrogen increased from 79.4% to 88.3%. Besides, there were a large number of denitrifying biofilms attached to the surface of PCL particles.
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Received: 21 June 2018
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