Effect of plant biomass on mixed dehydration of digested sludge using a belt press dehydrator at the waste water treatment plant

DOI
  • YAMASAKI Yukiyo
    国立研究開発法人土木研究所　先端材料資源研究センター　材料資源研究グループ
  • SHIGEMURA Hiroyuki
    国立研究開発法人土木研究所　先端材料資源研究センター　材料資源研究グループ

Bibliographic Information

Other Title
  • 実下水処理場のベルトプレス脱水機を用いた消化汚泥と植物系バイオマスの混合脱水システムの効果

Abstract

<p>　Technology that uses unused plant biomass as a dehydration aid for sewage sludge is useful for energy and cost savings in sewage works. It also helps promote plant biomass use bases in Waste Water Treatment Plants (WWTPs). In this study, plant biomass mixed dehydration test using a belt press dehydrator at the WWTP was conducted during winter and summer. A mixture comprising cut grasses or cut aquatic plants and digestive sludge was used in the test. Cost benefits and greenhouse gas emissions were evaluated, assuming that the dewatered sludge is disposed of outside the WWTP. The results suggest that the water content of the dehydrated cake was reduced by 0.6 to 2.3 points compared to normal dehydration. It was confirmed that even if the flocculant amount was reduced, the water content was lower than in normal dehydration. Moreover, the addition of biomass could reduce the amount of cake produced after dehydration by 0.7%–12%. In addition, sludge disposal costs can be reduced by 11%–13% compared to the process without the addition of biomass. Finally, it was demonstrated that this innovative technology could reduce greenhouse gas emissions at plantbased biomass generation operations and WWTPs by 0.5%–2.9%.</p>

Journal

Keywords

Details 詳細情報について

  • CRID
    1390295270228355200
  • DOI
    10.24748/jswa.60.725_92
  • ISSN
    24342475
    00214639
  • Text Lang
    ja
  • Data Source
    • JaLC
  • Abstract License Flag
    Disallowed

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