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Expression Characteristics of Polyelectrolyte Flocculated Sludges

高分子電解質絮凝污泥之壓榨特性

摘要


本報告探討高分子電解質絮凝活性污泥與球土泥漿對其壓榨脫水效率之影響。實驗中發現活性污泥較球土泥漿不易脫水,而經絮凝調理後兩者之脫水效率均獲得明顯的改善,並在電荷中和劑量時達到最佳脫水性。絮凝後濾餅之剛性提高,使得壓榨脫水機制自一階壓榨轉為二階壓榨,同時絮凝劑的存在會使水份自污泥固體表面移出,促進污泥顆粒間之蠕動錯位,此效應也使存在於活性污泥中剝除結合水之三階壓榨機制消失,有利於脫水。

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並列摘要


This work investigates how polyelectrolyte flocculation affects the dewatering efficiency of activated sludge and ball day slurry. Although the activated sludge is much more difficult to dewater than the clay slurry, polyelectrolyte flocculation markedly enhances the dewatering efficiency of both sludges, with the maximum improvement occurring at the charge neutralization point. Flocculation yields a stiff cake structure and transforms the major dewatering mechanisms from primary to secondary consolidation. The creeping of particles in The sludge is surface. This moisture loss reduces the total consolidation time and diminishes the tertiary consolidation stage in the activated sludge, which is advantageous to dewatering.

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