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    Title: Acidification and alkalization of textile chemical sludge: volume/solid reduction, dewaterability, and Al(III) recovery
    Authors: 李奇旺;Li, Chi-wang;Lin, Jr-lin;Kang, Shyh-fang;Liang, Chung-lin
    Contributors: 淡江大學水資源及環境工程學系
    Keywords: Acidification;Alkalization;Sludge reduction;Coagulant recovery;Dewatering
    Date: 2005-03
    Issue Date: 2010-03-26 16:26:26 (UTC+8)
    Publisher: Kidlington: Pergamon
    Abstract: The objectives of this study are to investigate the effects of acidification and alkalization on volume/solid reduction, dewaterability, and coagulant recovery from textile chemical sludge. The results indicate that solid reduction by acidification and alkalization was mainly due to the dissolution of Al. The best conditions for acidification and alkalization are pH = 2 and pH = 12, respectively, both exceeding 60% in Al(III) recovery efficiency. However, organic matters dissolved along with Al(III) dissolution by alkalization have detrimental effects on the usability of recovered Al. Thus, acidification was a better process for recovering coagulants than alkalization. In the meantime, only acidification could decrease both the capillary suction time (CST) and specific resistance value (SRF), indicating that only the acidification can improve the dewaterability of sludge.
    Relation: Separation and purification technology 42(1), pp.31-37
    DOI: 10.1016/j.seppur.2004.06.001
    Appears in Collections:[水資源及環境工程學系暨研究所] 期刊論文

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