期刊文献+

土地处理系统流态优化研究

Optimization of Flow Pattern for Wastewater Land Treatment System
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摘要 污水土地处理系统的水力特性直接影响其污染物处理效果,这种影响主要由停留时间不同造成。现阶段,在示踪试验的基础上,从填料层高度、流向、进水方式、出水方式四个因素入手,运用正交法进行土地处理系统工艺优化,最终达到提高系统处理效率的目的,为系统的设计和深入研究提供理论支持和技术参数。研究发现流向和填料层高度是土地处理系统水力特性的主要影响因素。上向流平均停留时间与理论值较为接近,死区百分率较小且流型更接近于活塞流,是首选方案。随着填料层高度的增加,死区百分率有减小的趋势,活塞流的体积效率也随之增大,填料层高度54 cm较34 cm更优。验证试验确定54 cm填料层高度-上向流-横向进水-纵向出水和54 cm填料层高度-上向流-纵向进水-纵向出水为最优方案。 Tracer experiment was conducted to investigate four parameters including flow direction,inflow and outflow paths and depth of the media used in a land treatment system,which may influence the retention time of the wastewater flow. Based on orthogonal test,it was found that flow direction and media depth were the main factors affecting hydraulic characteristics of a wastewater land treatment system.With the increase of media depth,percentage of dead zone tended to decline while volume efficiency of the plug flow increased.Finally,the optimized schemes for the flow pattern were verified.
机构地区 青岛理工大学
出处 《环境科学与技术》 CAS CSCD 北大核心 2011年第7期131-133,155,共4页 Environmental Science & Technology
基金 国家水专项子课题--多产业型小城镇水污染控制与治理共性关键技术研究与工程示范(2009ZX07317-008-02)
关键词 土地处理系统 正交试验 示踪试验 land treatment system orthogonal test tracer experiment
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参考文献6

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