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He Qiang, Ding Wenjing, Sima Weiping. Nitrogen removal efficiency of co-processing pickle wastewater and municipal sewage by cyclic activated sludge system(CASS) process[J]. Chinese Journal of Environmental Engineering, 2013, 7(4): 1331-1335.
Citation: He Qiang, Ding Wenjing, Sima Weiping. Nitrogen removal efficiency of co-processing pickle wastewater and municipal sewage by cyclic activated sludge system(CASS) process[J]. Chinese Journal of Environmental Engineering, 2013, 7(4): 1331-1335.
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Nitrogen removal efficiency of co-processing pickle wastewater and municipal sewage by cyclic activated sludge system(CASS) process

  • 1.

    Key Laboratory of the Three Gorges Reservoir Region’s Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045,China

  • 2.

    Faculty of Architecture Engineering, Sichuan University of Science & Engineering, Zigong 643000, China

  • Received Date: 23/02/2012
    Accepted Date: 28/12/2011
    Available Online: 09/04/2013
    Fund Project:
  • Two methods of adding carbon sources with pickle wastewater and methanol were proposed to solve the problem of the lack of carbon source on co-processing organic wastewater with high concentration of salt and nitrogen and municipal sewage by CASS process, and it was analyzed comparatively on the nitrogen removal efficiency under the three conditions of adding pickle wastewater, adding methanol and adding nothing when operating the reactor under the operation condition that the operating time was 8 h, drainage ratio was 30%, recycle ratio was 100% and the ratio of adding pickle wastewater was 20%. The results indicated that when the influent C/N ratio of co-processing was less than 3∶1 without adding carbon source, the removal efficiency of TN was poor in the system and the effluent concentration of TN could not meet the discharge standard; when C/N ratio was raised to 4∶1~5∶1 by adding pickle wastewater or methanol as carbon source, the removal efficiency of TN became better and the effluent concentration of TN could meet the first B class discharge standards of urban sewage treatment factory(GB18918-2002); the variations of salinity had restaining effect on the microorganism activity. When the salinity rose by 0.1%±0.02%, the microorganism system needed 10 days to recover; while the salinity reduced by 0.1%±0.02%, the microorganism system needed 15 days to recover.
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Nitrogen removal efficiency of co-processing pickle wastewater and municipal sewage by cyclic activated sludge system(CASS) process

  • Received Date: 23/02/2012
  • Accepted Date: 28/12/2011
  • Available Online: 09/04/2013
Fund Project:

Abstract: Two methods of adding carbon sources with pickle wastewater and methanol were proposed to solve the problem of the lack of carbon source on co-processing organic wastewater with high concentration of salt and nitrogen and municipal sewage by CASS process, and it was analyzed comparatively on the nitrogen removal efficiency under the three conditions of adding pickle wastewater, adding methanol and adding nothing when operating the reactor under the operation condition that the operating time was 8 h, drainage ratio was 30%, recycle ratio was 100% and the ratio of adding pickle wastewater was 20%. The results indicated that when the influent C/N ratio of co-processing was less than 3∶1 without adding carbon source, the removal efficiency of TN was poor in the system and the effluent concentration of TN could not meet the discharge standard; when C/N ratio was raised to 4∶1~5∶1 by adding pickle wastewater or methanol as carbon source, the removal efficiency of TN became better and the effluent concentration of TN could meet the first B class discharge standards of urban sewage treatment factory(GB18918-2002); the variations of salinity had restaining effect on the microorganism activity. When the salinity rose by 0.1%±0.02%, the microorganism system needed 10 days to recover; while the salinity reduced by 0.1%±0.02%, the microorganism system needed 15 days to recover.

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