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LI Wenhao, JIN Ningben, LOU Ziyang, ZHU Nanwen, YUAN Haiping. Internal circulation autothermal thermophilic aerobic digestion for sewage sludge treatment[J]. Chinese Journal of Environmental Engineering, 2017, 11(9): 5182-5187. doi: 10.12030/j.cjee.201610048
Citation: LI Wenhao, JIN Ningben, LOU Ziyang, ZHU Nanwen, YUAN Haiping. Internal circulation autothermal thermophilic aerobic digestion for sewage sludge treatment[J]. Chinese Journal of Environmental Engineering, 2017, 11(9): 5182-5187. doi: 10.12030/j.cjee.201610048
shu

Internal circulation autothermal thermophilic aerobic digestion for sewage sludge treatment

  • 1.

    Shanghai Jiao Tong University School of Environment of Science and Engineering, Shanghai 200240, China

  • Received Date: 24/11/2016
    Accepted Date: 10/10/2016
    Available Online: 26/08/2017
    Fund Project:
  • In order to improve the efficiency of sludge digestion, an internal circulation autothermal thermophilic aerobic digestion with an inner cylinder was investigated. The sludge was cycled between inner and outer cylinder. The results showed that in internal circulation autothermal thermophilic aerobic digestion(ATAD) system, the removal of volatile solids (VS) at 16 d was 41.52%. At 20 d, the removal of VS was increased 11.39% than no internal circulation. With the inner cylinder, the value of ORP and pH both in the top and bottom maintained in a higher level, the anaerobic condition was relieved. The pH, ORP, NH4+-H, SCOD, TVFA, TN and TP concentrations in the top of reactor were in accordance with those in the bottom. The sludge could be mixed more homogeneous with the inner cylinder.
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Internal circulation autothermal thermophilic aerobic digestion for sewage sludge treatment

  • Received Date: 24/11/2016
  • Accepted Date: 10/10/2016
  • Available Online: 26/08/2017
Fund Project:

Abstract: In order to improve the efficiency of sludge digestion, an internal circulation autothermal thermophilic aerobic digestion with an inner cylinder was investigated. The sludge was cycled between inner and outer cylinder. The results showed that in internal circulation autothermal thermophilic aerobic digestion(ATAD) system, the removal of volatile solids (VS) at 16 d was 41.52%. At 20 d, the removal of VS was increased 11.39% than no internal circulation. With the inner cylinder, the value of ORP and pH both in the top and bottom maintained in a higher level, the anaerobic condition was relieved. The pH, ORP, NH4+-H, SCOD, TVFA, TN and TP concentrations in the top of reactor were in accordance with those in the bottom. The sludge could be mixed more homogeneous with the inner cylinder.

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