The role of filter media in removing suspended and colloidal particles in an anaerobic reactor treating domestic sewage

被引：40

作者：

Elmitwalli, TA ^{[1
]}

van Dun, M ^{[1
]}

Bruning, H ^{[1
]}

Zeeman, G ^{[1
]}

Lettinga, G ^{[1
]}

机构：

[1] Agr Univ Wageningen, Dept Agr Environm & Syst Technol, Sub Dept Environm Technol, NL-6700 EV Wageningen, Netherlands

来源：

BIORESOURCE TECHNOLOGY | 2000年 / 72卷 / 03期

关键词：

anaerobic treatment; domestic sewage; suspended solids; colloidal particles; polyurethane filter;

D O I：

10.1016/S0960-8524(99)00120-0

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

A column packed with clean sheets of reticulated polyurethane foam was fed with either raw sewage, synthetic sewage or skimmed milk for a short time to evaluate the mechanism of physical entrapment and filtration of particles. The results revealed that clean media were effective in the removal of suspended chemical oxygen demand (COD) (>75%) even with hydraulic retention time (HRT) as low as 0.5 h or upflow velocity as high as 10 m/h. However, the removal of colloidal COD remained poor under all experimental conditions. The treatment of raw sewage and paper-filtered sewage in a fed-batch recirculation system under anaerobic conditions resulted in average removal efficiencies for colloidal COD of 63% and 81%, respectively at a temperature of 24 +/- 1 degrees C. Therefore, the presence of an anaerobic biofilm and the removal of suspended solids (SS) from the influent increased the removal efficiency of colloidal COD in the treatment of domestic sewage in an anaerobic polyurethane-foam filter. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：235 / 242

页数：8

共 27 条

[1] COMPARISON OF POROUS AND NONPOROUS MEDIA IN UPFLOW ANAEROBIC FILTERS WHEN TREATING DAIRY WASTE-WATER [J].