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The effect of sludge recirculation rate on a UASB-digester treating domestic sewage at 15 °C.

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اقرأ أكثر حفظ في قائمتي
  • المؤلفون: Zhang L;Zhang L; Hendrickx TL; Kampman C; Zeeman G; Temmink H; Li W; Buisman CJ
  • المصدر:
    Water science and technology : a journal of the International Association on Water Pollution Research [Water Sci Technol] 2012; Vol. 66 (12), pp. 2597-603.
  • نوع النشر :
    Journal Article; Research Support, Non-U.S. Gov't
  • اللغة:
    English
  • معلومة اضافية
    • المصدر:
      Publisher: IWA Publishing Country of Publication: England NLM ID: 9879497 Publication Model: Print Cited Medium: Print ISSN: 0273-1223 (Print) Linking ISSN: 02731223 NLM ISO Abbreviation: Water Sci Technol Subsets: MEDLINE
    • بيانات النشر:
      Publication: <1998->: London : IWA Publishing
      Original Publication: Oxford ; New York : Pergamon Press, 1981-
    • الموضوع:
      Bioreactors* ; Family Characteristics* ; Rheology* ; Temperature*; Sewage/*chemistry ; Water Purification/*instrumentation; Anaerobiosis ; Biodegradation, Environmental ; Biological Oxygen Demand Analysis ; Colloids ; Methane/metabolism ; Pilot Projects ; Volatilization ; Waste Disposal, Fluid
    • نبذة مختصرة :
      The anaerobic treatment of low strength domestic sewage at low temperature is an attractive and important topic at present. The upflow anaerobic sludge bed (UASB)-digester system is one of the anaerobic systems to challenge low temperature and concentrations. The effect of sludge recirculation rate on a UASB-digester system treating domestic sewage at 15 °C was studied in this research. A sludge recirculation rate of 0.9, 2.6 and 12.5% of the influent flow rate was investigated. The results showed that the total chemical oxygen demand (COD) removal efficiency rose with increasing sludge recirculation rate. A sludge recirculation rate of 0.9% of the influent flow rate led to organic solids accumulation in the UASB reactor. After the sludge recirculation rate increased from 0.9 to 2.6%, the stability of the UASB sludge was substantially improved from 0.37 to 0.15 g CH₄-COD/g COD, and the bio-gas production in the digester went up from 2.9 to 7.4 L/d. The stability of the UASB sludge and bio-gas production in the digester were not significantly further improved by increasing sludge recirculation rate to 12.5% of the influent flow rate, but the biogas production in the UASB increased from 0.37 to 1.2 L/d. It is recommended to apply a maximum sludge recirculation rate of 2-2.5% of the influent flow rate in a UASB-digester system, as this still allows energy self-sufficiency of the system.
    • الرقم المعرف:
      0 (Colloids)
      0 (Sewage)
      OP0UW79H66 (Methane)
    • الموضوع:
      Date Created: 20121031 Date Completed: 20130304 Latest Revision: 20131121
    • الموضوع:
      20240628
    • الرقم المعرف:
      10.2166/wst.2012.487
    • الرقم المعرف:
      23109575