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Zhong Hang, Li Dong, Wu Di, Zeng Taotao, Liu Liqian, Su Dongxia, Zhang Jie. Research on influencing factors and operation optimization for CSTR partial nitrification at normal temperature[J]. Chinese Journal of Environmental Engineering, 2013, 7(4): 1225-1230.
Citation: Zhong Hang, Li Dong, Wu Di, Zeng Taotao, Liu Liqian, Su Dongxia, Zhang Jie. Research on influencing factors and operation optimization for CSTR partial nitrification at normal temperature[J]. Chinese Journal of Environmental Engineering, 2013, 7(4): 1225-1230.
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Research on influencing factors and operation optimization for CSTR partial nitrification at normal temperature

  • 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

  • Received Date: 09/04/2012
    Accepted Date: 02/02/2012
    Available Online: 09/04/2013
    Fund Project:
  • In order to achieve and maintain stable performance of partial nitrification,the influencing factors of partial nitrification and optimum conditions were studied using synthetic wastewater with low ammonia nitrogen concentration at normal temperature in a CSTR. Results showed that under the condition of HRT=(3.0±0.2)h, DO=0.40~0.50 mg/L, R=20%~30%, the average ammonia nitrogen removal rate reached 53%, NO2--N/NH4+-N in the effluent of partial nitrification system reached 1.11∶1 which was suitable for the long-term run of this system. Shortening the HRT continuously would make a great loss of sludge, then affect the performance of CSTR. DO=0.50 mg/L was critical for nitrite accumulation under optimal conditions; the different values of influent and effluent pH can well characterize the effluent ratio of NO2--N/NH4+-N.
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Research on influencing factors and operation optimization for CSTR partial nitrification at normal temperature

  • Received Date: 09/04/2012
  • Accepted Date: 02/02/2012
  • Available Online: 09/04/2013
Fund Project:

Abstract: In order to achieve and maintain stable performance of partial nitrification,the influencing factors of partial nitrification and optimum conditions were studied using synthetic wastewater with low ammonia nitrogen concentration at normal temperature in a CSTR. Results showed that under the condition of HRT=(3.0±0.2)h, DO=0.40~0.50 mg/L, R=20%~30%, the average ammonia nitrogen removal rate reached 53%, NO2--N/NH4+-N in the effluent of partial nitrification system reached 1.11∶1 which was suitable for the long-term run of this system. Shortening the HRT continuously would make a great loss of sludge, then affect the performance of CSTR. DO=0.50 mg/L was critical for nitrite accumulation under optimal conditions; the different values of influent and effluent pH can well characterize the effluent ratio of NO2--N/NH4+-N.

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