Enhanced flocculation/sedimentation process by a jet mixed separator

被引：18

作者：

Watanabe, Y ^{[1
]}

Kasahara, S

Iwasaki, Y

机构：

[1] Hokkaido Univ, Dept Environm Engn, Sapporo, Hokkaido 0608628, Japan

[2] Kiyomoto Co Ltd, R&D Div, Nobeoka 082, Japan

来源：

WATER SCIENCE AND TECHNOLOGY | 1998年 / 37卷 / 10期

关键词：

flocculation; sedimentation; jet mixed separator; rapid sand filtration system; hybrid treatment system;

D O I：

10.1016/S0273-1223(98)00298-4

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

This paper deals with the performance of a jet mixed separator (JMS) which has a series of porous plates inserted in the channel perpendicular to a flow. The water passes through holes in the plates, thus creating jets which gently mix the water on itself. Simultaneous flocculation of suspended particles and sedimentation of grown-flocs occur in the JMS, because large-scale eddies in the vertical plane are almost absent in it. The JMS incorporated with inclined tube settlers was applied to the rapid sand filtration system instead of the combination of mechanical flocculator and sedimentation basin. The turbidity of JMS effluent was constantly below 1 TU at the hydraulic retention time of about 1 hour. The JMS without inclined tube settlers was used as physico-chemical pretreatment process for the rotating biological contactors, The BOD and suspended solids concentration of JMS effluent were around 50 and 40 mg/L, respectively at the hydraulic retention time of 45 min. (C) 1998 Printed by Elsevier Science Ltd. All rights reserved

引用

页码：55 / 67

页数：13

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