2017 Volume 11 Issue 9
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ZHAO Ying, SUN Chenglin, WANG Yamin, WEI Huangzhao, HAN Jin, YU Yonghui, YU Yang. Acidification demulsion-extraction-steamed ammonia pretreatment for catalytic wet peroxide oxidation of coal gasification wastewater treatment[J]. Chinese Journal of Environmental Engineering, 2017, 11(9): 5049-5056. doi: 10.12030/j.cjee.201611028
Citation: ZHAO Ying, SUN Chenglin, WANG Yamin, WEI Huangzhao, HAN Jin, YU Yonghui, YU Yang. Acidification demulsion-extraction-steamed ammonia pretreatment for catalytic wet peroxide oxidation of coal gasification wastewater treatment[J]. Chinese Journal of Environmental Engineering, 2017, 11(9): 5049-5056. doi: 10.12030/j.cjee.201611028
shu

Acidification demulsion-extraction-steamed ammonia pretreatment for catalytic wet peroxide oxidation of coal gasification wastewater treatment

  • 1.

    Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China

  • 2.

    University of Chinese Academy of Sciences, Beijing 100049, China

  • 3.

    Institute of Environmental Science and Engineering, Liaoning Technical University, Fuxin 123000, China

  • Received Date: 31/12/2016
    Accepted Date: 03/11/2016
    Available Online: 26/08/2017
    Fund Project:
  • A method of high temperature CWPO with a combination pretreatment process of acidification demulsion, extraction and steamed ammonia whose effluent presented its temperature as high as 87 to 95℃ was investigated to improve the biodegradability of coal gasification wastewater. Compared 3%Fe/Al2O3 and 3%Fe/SAC, over 60% of COD and 90% of the total phenol could be removed under the optimized condition(temperature of 80℃, pH0 of 4,H2O2 of 7.8 to 10.5 mg·L-1, LHSV of 0.5 h-1) with 3%Fe/SAC for the pretreatment of coal gasification effluent. COD removal rate as high as 60%, the total phenol removal rate as high as 90% above, the H2O2 utilization rate was more than 99% and chromaticity by initial 1 000 times down to 2 times, in addition, the effluent could reach the requirements of water quality standard for biochemical treatment system due to its high biodegradability as B/C=0.51.
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Acidification demulsion-extraction-steamed ammonia pretreatment for catalytic wet peroxide oxidation of coal gasification wastewater treatment

  • Received Date: 31/12/2016
  • Accepted Date: 03/11/2016
  • Available Online: 26/08/2017
Fund Project:

Abstract: A method of high temperature CWPO with a combination pretreatment process of acidification demulsion, extraction and steamed ammonia whose effluent presented its temperature as high as 87 to 95℃ was investigated to improve the biodegradability of coal gasification wastewater. Compared 3%Fe/Al2O3 and 3%Fe/SAC, over 60% of COD and 90% of the total phenol could be removed under the optimized condition(temperature of 80℃, pH0 of 4,H2O2 of 7.8 to 10.5 mg·L-1, LHSV of 0.5 h-1) with 3%Fe/SAC for the pretreatment of coal gasification effluent. COD removal rate as high as 60%, the total phenol removal rate as high as 90% above, the H2O2 utilization rate was more than 99% and chromaticity by initial 1 000 times down to 2 times, in addition, the effluent could reach the requirements of water quality standard for biochemical treatment system due to its high biodegradability as B/C=0.51.

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