標題: Enhancement of anaerobic digestion of waste activated sludge by alkaline solubilization
作者: Lin, JG
Chang, CN
Chang, SC
環境工程研究所
Institute of Environmental Engineering
關鍵字: waste activated sludge;anaerobic digestion;hydrolysis;chemical pretreatment;dewaterability
公開日期: 1-十二月-1997
摘要: The performance of an anaerobic digestion fed with waste activated sludge (WAS) pretreated with NaOH was examined The sludge was periodically collected from a municipal wastewater-treatment plant. The laboratory work was run in four I-I semi-continuous anaerobic digestion reactors. Reactor-A was fed with untreated WAS at 1% total solids (TS). The other three reactors, B, C and D, were respectively fed with WAS (1% TS) pretreated with 20 meq/l NaOH, WAS (1% TS) pretreated with 40 meq/l NaOH, and WAS (2% TS) pretreated with 20 meq/l NaOH. The reactors were operated at 35 degrees C at four hydraulic retention rimes - 20, 13, 10 and 7.5 days. The performances of reactors B, C and D, in terms of chemical oxygen demand (GOD), volatile solids (VS) removal, and gas production, were superior to that of reactor A. At a retention time of 10 days, the COD removals of reactors A, B, C and D were 38, 46, 51 and 52%, respectively. The gas productions of reactors B, C and D were, respectively, increased by 33, 30 and 163% over that of reactor A. The sludge dewaterability was examined by capillary suction rime (CST). The dewaterability of digested sludge was improved in reactors B, C and D. Capillary suction of digested sludges gave times in the range 148-389 s, compared with 309-735 s for undigested sludges. (C) 1997 Elsevier Science Ltd.
URI: http://dx.doi.org/10.1016/S0960-8524(97)00121-1
http://hdl.handle.net/11536/154
ISSN: 0960-8524
DOI: 10.1016/S0960-8524(97)00121-1
期刊: BIORESOURCE TECHNOLOGY
Volume: 62
Issue: 3
起始頁: 85
結束頁: 90
顯示於類別:期刊論文


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  1. 000071379600003.pdf