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砂滤池对颤蚓的拦截和去除效果研究 被引量:5

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摘要 中试条件下研究了砂滤池对颤蚓的拦截效果,并考察了滤速、过滤周期和反冲洗强度等对颤蚓拦截和去除效果的影响。结果表明:砂滤池对颤蚓的拦截效果与颤蚓体长和滤料粒径有关,颤蚓体长越大、滤料粒径越小,则拦截效果越好;滤速是颤蚓迁移的主要动力,滤速的提高会增大颤蚓泄漏风险;过滤周期的延长将促进颤蚓的迁移,适当缩短过滤周期有利于水厂颤蚓泄漏风险控制;反冲洗可以实现颤蚓从净水工艺中的彻底去除,反冲洗强度越大,颤蚓的去除效果越好。从试验结果来看,为有效控制颤蚓泄漏风险,滤池滤速和过滤周期宜分别控制在11.1 m/h和12 h以下,反冲洗强度则控制在25 L/(s.m2)左右,此时颤蚓去除率为97.7%。
出处 《给水排水》 CSCD 北大核心 2010年第2期17-20,共4页 Water & Wastewater Engineering
基金 国家重大科技专项课题(2009ZX07423-003) 教育部创新团队支持项目(IRT0853)
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参考文献15

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