UV disinfection of wastewater coagulated with ferric chloride: Recalcitrance and fouling problems

被引：16

作者：

Gehr, R ^{[1
]}

Wright, H ^{[1
]}

机构：

[1] McGill Univ, Dept Civil Engn, Montreal, PQ H3A 2K6, Canada

来源：

WATER SCIENCE AND TECHNOLOGY | 1998年 / 38卷 / 03期

关键词：

UV disinfection; ferric chloride; pilot plants;

D O I：

10.1016/S0273-1223(98)00447-8

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Collimated beam and pilot tests using low pressure or medium pressure UV lamps were conducted to assess the disinfection performance of a municipal wastewater which had been pretreated by ferric chloride coagulation followed by sedimentation. The feed to the UV systems contained high levels of Fe (often above 3 mg/l); suspended solids and UV254 transmission values were also not ideal (mean approximately 30 mg/l and 32% respectively). The collimated beam tests indicated that the target level of 2,500 coliform forming units/100 ml often could not be reached, and the pilot tests revealed significant fouling after only a few hours. Thus physicochemical effluents of this nature likely require upstream filtration (or a relaxation of the target level) and a continual, automated cleaning system to ensure that performance levels can be maintained. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.

引用

页码：15 / 23

页数：9