期刊
WATER RESEARCH
卷 45, 期 18, 页码 5969-5976出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2011.08.064
关键词
Freeze/thaw treatment; Curing; Waste activated sludge; Mixed sludge; Solubilization; Dewaterability
资金
- National Nature Science Foundation of China [50821002]
- National Water Pollution Control and Management [2009ZX07317-008]
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology [2010DX17]
- Heilongjiang Province Science Foundation for Youths [QC2009C113]
Freeze/thaw (F/T) treatment is an efficient pre-treatment process for biological sludges. When bulk sludge was frozen, tiny unfrozen regimes in the ice matrix were continuously dehydrated by surrounding ice fronts, termed as the curing stage. This work demonstrated that the F/T treatment could not only enhance sludge dewaterability, but also solubilize organic matters from sludge matrix. Most enhancement of sludge dewaterability was achieved during bulk freezing stage, with the waste activated sludge more readily dewatered than the mixed sludges after treatment. Conversely, the freezing stage released only limited quantities of organic matters to liquid. Conversely, the curing contributed mostly on chemical oxygen demand (COD) solubilization and NH(3)-N release. The crystallization of intra-aggregate moisture was claimed to damage cell membranes so to release intracellular substances to surroundings. The F/T treatment with sufficient curing is advised to effectively condition biological sludge as the feedstock of the following anaerobic digestion process. (C) 2011 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据