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Wang Runzhong, Hao Ruixia, Zhao Wenli. Preparation and properties of new slow-release organic carbon source[J]. Chinese Journal of Environmental Engineering, 2016, 10(1): 81-87. doi: 10.12030/j.cjee.20160113
Citation: Wang Runzhong, Hao Ruixia, Zhao Wenli. Preparation and properties of new slow-release organic carbon source[J]. Chinese Journal of Environmental Engineering, 2016, 10(1): 81-87. doi: 10.12030/j.cjee.20160113
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Preparation and properties of new slow-release organic carbon source

  • 1.

    Key Laboratory of Beijing for Water Quality Science and Water Environmental Recovery Engineering, College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China

  • 2.

    Beijing Origin Water Technology Co., Ltd., Beijing 102206, China

  • Received Date: 04/02/2015
    Accepted Date: 23/09/2014
    Available Online: 25/01/2016
    Fund Project:
  • To improve the denitrification rate of starch/polyvinyl alcohol(PVA) and effectively control the carbon release rate,a new slow-release organic carbon source(SOC) was synthesized by adding acetate starch/hydrophobic emulsifier(SPAN80),secondary encapsulation and surface cross-linking reaction.The optimum material ratio,nitrogen removal efficiency and release model of SOC were investigated by carbon release and denitrification experiments.The results showed that the denitrification efficiency would ascend rapidly with augmenting of starch content in SOC while the rise of release speed may increase the concentration of COD in the effluent.When the content of starch was 58.2%,the appropriate carbon release rate and nitrogen removal efficiency could be obtained and the nitrate removal efficiency,average denitrification rate and the effluent concentration of COD could reach 100%,11.67 mg/(L·h) and 27.65 mg/L,as the carbon emission and utilization achieved a balance.So the high nitrogen removal efficiency,long life cycle and controlled carbon release rate made the new SOC suitable for engineering application.
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Preparation and properties of new slow-release organic carbon source

  • Received Date: 04/02/2015
  • Accepted Date: 23/09/2014
  • Available Online: 25/01/2016
Fund Project:

Abstract: To improve the denitrification rate of starch/polyvinyl alcohol(PVA) and effectively control the carbon release rate,a new slow-release organic carbon source(SOC) was synthesized by adding acetate starch/hydrophobic emulsifier(SPAN80),secondary encapsulation and surface cross-linking reaction.The optimum material ratio,nitrogen removal efficiency and release model of SOC were investigated by carbon release and denitrification experiments.The results showed that the denitrification efficiency would ascend rapidly with augmenting of starch content in SOC while the rise of release speed may increase the concentration of COD in the effluent.When the content of starch was 58.2%,the appropriate carbon release rate and nitrogen removal efficiency could be obtained and the nitrate removal efficiency,average denitrification rate and the effluent concentration of COD could reach 100%,11.67 mg/(L·h) and 27.65 mg/L,as the carbon emission and utilization achieved a balance.So the high nitrogen removal efficiency,long life cycle and controlled carbon release rate made the new SOC suitable for engineering application.

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