城市污泥水热脱水处理的工业应用与研究进展

发布时间：2018-05-29 02:06

本文选题：城市污泥 + 废物处理　；参考：《化工进展》2017年11期

【摘要】：城市污泥是人类生活活动的副产品,对其脱水处理是污泥处置的关键。其中,水热脱水技术由于其能有效提高污泥脱水效率与低能耗等优势,成为污泥减量化与资源化处理的研究热点。文章首先介绍了城市污泥的特点及其处理现状,然后总结了近年来国内外关于污泥水热脱水工艺的发展历程与工业应用情况,并进一步对比分析了污泥水热脱水与其他脱水技术之间的能耗优势。此外,重点综述了污泥水热脱水的影响因素与机理,包括温度、时间、p H等处理条件以及水热过程中污泥水分形态与胞外聚合物(EPS)对污泥脱水性能的影响,并分析了目前机理研究上存在的矛盾与原因。最后对污泥水热脱水的发展前景作出展望,指出通过优化EPS分层提取从而深入分析污泥中各组分在水热过程中的迁移与结构变化是研究污泥水热脱水机理的重要途径。
[Abstract]:Urban sludge is a byproduct of human life. Dewatering sludge is the key of sludge disposal. Among them, hydrothermal dehydration technology has become the research focus of sludge reduction and resource treatment because of its advantages of effectively improving sludge dewatering efficiency and low energy consumption. This paper first introduces the characteristics and treatment status of municipal sludge, and then summarizes the development history and industrial application of sludge hydrothermal dewatering process at home and abroad in recent years. Furthermore, the advantages of energy consumption between hydrothermal sludge dewatering and other dehydration technologies are compared and analyzed. In addition, the influencing factors and mechanism of sludge hydrothermal dewatering, including the treatment conditions such as temperature, time and pH, and the effects of water form of sludge and extracellular polymer EPSs on sludge dewatering performance were reviewed. The existing contradictions and reasons in the research of mechanism are also analyzed. Finally, the prospect of sludge hydrothermal dehydration is prospected, and it is pointed out that it is an important way to study the mechanism of sludge hydrothermal dehydration by optimizing the EPS stratification extraction and analyzing the migration and structure change of each component in sludge during the process of water and heat treatment.
【作者单位】：中国科学院广州能源研究所;中国科学院可再生能源重点实验室;广东省新能源和可再生能源研究开发与应用重点实验室;中国科学院大学;
【基金】：国家自然科学基金(51661145022,51676195) 广东省自然科学基金重大基础研究培育项目(2017B030308002)
【分类号】：X703

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