Characterization of bioflocculants from biologically aerated filter backwashed sludge and its application in dying wastewater treatment
Characterization of bioflocculants from biologically aerated filter backwashed sludge and its application in dying wastewater treatment
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曝气生物滤池反冲洗污泥中生物絮凝剂的表征及其在印染废水处理中的应用
DOI：
10.1016/j.biortech.2008.12.017
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发表时间：
2009-05-01
影响因子：
11.4
通讯作者：
Li, BaoZhen
中科院分区：
文献类型：
--
作者：
Liu, WeiJie;Yuan, HongLi;Li, BaoZhen
本研究探讨了从反冲洗污泥中提取生物絮凝剂以降低生产成本的可行性。结果表明，超声和碱处理均能显著提高生物絮凝剂的萃取效率，但影响絮凝活性。从pH为11.0的污泥中提取的生物絮凝剂没有絮凝活性。从pH为5.0的污泥中提取的生物絮凝剂M-1具有良好的絮凝活性。为进一步研究M-1的絮凝活性，考察了生物絮凝剂投加量、温度和反应溶液pH等因素。最佳絮凝剂用量为6.0 mg/l， pH为5.0，温度为10℃，在此条件下，高岭土的絮凝率为92.67%。考察了该生物絮凝剂对合成染色废水的脱色效果。在水溶液中絮凝亚甲基蓝和坚牢蓝，脱色效率分别为82.9%和77.8%。(C) 2008 Elsevier Ltd版权所有。
In this study, the feasibility of bioflocculant extraction from backwashing sludge to reduce its production costs was investigated. Results showed that ultrasound and base treatment could significantly enhance bioflocculant extraction efficiency, however, flocculating activity was affected. It was observed that bioflocculants extracted from sludge of pH 11.0 had no flocculating activity. In contrast, bioflocculants extracted from sludge of pH 5.0, named as M-1, had good flocculating activity. To further study the flocculating activity of M-1, factors such as bioflocculant dosage, temperature and pH of the reaction solution were tested. The optimal conditions were 6.0 mg/l bioflocculant dosage and pH 5.0, at a temperature of 10 degrees C. Under these conditions, the flocculating rate of kaolin clay was 92.67%. The effectiveness of such bioflocculants in the decolorization of synthetically dyed wastewater was then examined. In flocculating methylene blue and fast blue in aqueous solutions, decolorization efficiency levels were 82.9% and 77.8%, respectively. (C) 2008 Elsevier Ltd. All rights reserved.