摘要
污泥淤砂分离器是一种能够使活性污泥中污泥有机质与淤砂分离的设备。为了实现污泥淤砂分离器的结构优化,重点探讨了污泥淤砂分离器最重要的结构参数-排口比K(底流口直径Du与溢流口直径Do之比)对污泥淤砂分离器分离效能的影响。实验结果表明,在排口比从0.32增加到1.0的过程中,分离器处理能力Qi基本保持不变,分流比S、分离效率η和底流污泥ρ(MLVSS)/ρ(MLSS)分别从0.084、24.7%和0.21增加到0.338、41.1%和0.33.4;污泥有机质富集率FMLVSS和淤砂富集率FMLISS分别从1.95和1.35减小到1.22和1.12。富集除砂所需要的K和分离器获得较高的除砂效率η时所需K不一致。污泥淤砂分离器排口比K设计为0.4~0.6时,能够获得较高的分离效率,并实现淤砂的富集排放。
The grit separation module is a device which can separate the sludge organic matter and grit in activated sludge. In order to achieve the goal of the structure optimization of the grit separation module,the paper focused on the outlet ratio K,the most important structure parameter,to the effects of the separation efficiency of the grit separation module. The research showed that with the increase of the outlet ratio from 0. 32 to 1. 0,separator processing ability remained unchanged. The split ratio S,the separation efficiency η and ρ( MLVSS) /ρ( MLSS) of the underflow sludge increased from 0. 084,24. 7%,0. 21 to 0. 338,41. 1%,0. 33,respectively.Sludge organic matter accumulation rate( FMLVSS) and grit accumulation rate( FMLISS) decreased from 1. 95,1. 35 to 1. 22,1. 12,respectively. The outlet ratio for the enrichment degrit and grit separation module obtaining higher degrit efficiency is different. Outlet ratio K is proposed to design from 0. 4 to 0. 6,and it can obtain the enrichment grit emissions while achieving high separation efficiency.
出处
《环境工程学报》
CAS
CSCD
北大核心
2014年第9期3596-3600,共5页
Chinese Journal of Environmental Engineering
基金
国家水体污染控制与治理重大科技专项(2009ZX07318-008-003)
重庆市重大科技专项(CSTC
2008AB7133)
关键词
排口比
污泥淤砂分离器
旋流分离
分离效能
活性污泥
outlet ratio
grit separation module
hydrocyclone separation
separation performance
activated sludge
