滤池反冲洗水直接回流对沉淀池出水悬浮物影响的数学模型研究  

Research of Mathematical Model of Effect of Direct Recirculation of Filter Backwash Wastewater on Suspended Solids in Settling Tank Effluent

作　　者：赵钪 张晓卫[1] 严浩[1] ZHAO Kang;ZHANG Xiaowei;YAN Hao(CISDI Engineering Co.,Ltd.,Chongqing 401122,China)

机构地区：[1]中冶赛迪工程技术股份有限公司,重庆401122

出　　处：《给水排水》2025年第2期164-168,共5页Water & Wastewater Engineering

摘　　要：滤池反冲洗水直接回流在沉淀-过滤处理工艺中应用广泛,该回用方式对沉淀出水中悬浮固体浓度产生的影响需要被定量描述与分析。基于理想沉淀池假设,通过研究滤池反冲洗水循环回用后沉淀池进出水悬浮物浓度变化规律,对不同沉速颗粒的沉淀去除率分类进行分析,引入滤池反冲洗水直接回流负效应系数,建立了描述滤池反冲洗水直接回流影响下沉淀池总去除率的数学模型,展示了原水不同沉速颗粒分布情况对反冲洗水回用设计的决定性作用。As direct recirculation of filter backwash wastewater is widely used in the sedimentation-filtration treatment process,it is necessary to quantitatively describe and analyze the effect of this operational mechanism on the concentration of suspended solids in the effluent from settling tank.Based on the hypothesis of ideal settling tank,by studying the changes in the water quality of settling tank influent and effluent with direct recirculation of filter backwash wastewater,analyzing removal rates of particles with different sedimentation velocity in settling tank,and introducing the negative effect coefficient of direct recirculation,a mathematical model to describe the total removal rate of the sedimentation tank influenced by direct recirculation was established.As a result,it is demonstrated that sedimentation velocity distribution of suspended particles in raw water plays a decisive role in the design of filter backwash wastewater recycling.

关 键 词：沉淀 过滤 反冲洗水 悬浮颗粒 数学模型 

分 类 号：TU991[建筑科学—市政工程]