余剰活性汚泥の圧搾特性および最終含水率に及ぼす凍結融解処理の影響

DOI Web Site Web Site 被引用文献12件

書誌事項

タイトル別名
  • The effect of freezing and thawing process on the expression characteristics and final moisture content of excess activated sludge.
  • ヨジョウ カッセイ オデイ ノ アッサク トクセイ オヨビ サイシュウ ガンス

この論文をさがす

抄録

The expression characteristics and the final moisture content of unfrozen and frozen excess activated sludges produced at a municipal wastewater treatment plant were evaluated from constant-pressure expession experiments at 2062950 kPa. The modified consolidation coefficient Cg and creep constant η were approximately constant over these experimental pressures, but both values were increased 2025 % by the freezing and thawing process. Consequently, it is concluded that the freezing and thawing process increases the rate of both primary and secondary consolidation. The values of η of unfrozen and frozen activated sludges were nearly equal to those for typical inorganic sludge, but the values of Cg were 1/1000 of those of typical inorganic sludge. Regardless of expression pressure or the freezing and thawing process, the yalues of B, which is the ratio of secondary consolidation to the total consolidation, were about 0.9, which was much larger than those of inorganic sludge. Therefore, the rate of secondary consolidation is a controlling factor in the consolidation of excess activated sludge. The wet-basis moisture content of final cake of frozen excess activated sludge were 0.1 lower than those of unfrozen sludge. Thus, it is suggested that even the cake obtained under low pressure (200kPa) may burn without auxiliary fuel.

収録刊行物

被引用文献 (12)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ