The Quantity and Quality of Waste Excess Sludge through Cleaning Discharged from Small-scale On-site Domestic Wastewater Treatment Systems

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Other Title
  • 小型合併処理浄化槽の清掃汚泥の発生量とその性状

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Abstract

Small-scale on-site domestic wastewater treatment systems have recently been used for disposal of domestic wastewater. However, little is known about the quantity and quality of the waste excess sludge discharged from these systems through cleaning, because the systems were recently improved.<BR>In this study, the quantity and quality of the excess sludge discharged from the systems were investigated as part of an evaluation of excess sludge treatment at night-soil treatment plants.<BR>The amount of the excess sludge was about 0.84 m3/person/year. Total solid (TS) was 22, 000 mg/l, and biological oxygen demand (BOD) was 6, 000 mg/l. The amount of the excess sludge was 1-2.5 times that of the flush toilet wastewater treatment systems and the sludge from the the conventional large or middle scale domestic wastewater treatment systems. The concentrations of various sludge components were between that of the sludge from flush toilet systems, and that of the sludge from large-or middle-scale domestic systems. They ranged from 30-70% for the collected night-soil, which contained many solids but little organic matter. These results suggest the necessity for further research on excess sludge treatment systems.

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Details 詳細情報について

  • CRID
    1390282680273614848
  • NII Article ID
    10002082295
  • NII Book ID
    AN10414685
  • DOI
    10.3985/jswme.6.252
  • ISSN
    1883163X
    18831648
  • Text Lang
    ja
  • Data Source
    • JaLC
    • Crossref
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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