Evaluation of high-rate clarification for wet-weather-only treatment facilities

被引：10

作者：

Jolis, D ^{[1
]}

Ahmad, ML ^{[1
]}

机构：

[1] San Francisco Publ Util Commiss, Water Pollut Control Div, San Francisco, CA USA

来源：

WATER ENVIRONMENT RESEARCH | 2004年 / 76卷 / 05期

关键词：

ballasted flocculation; combined sewer overflows; high-rate clarification; wet-weather-only treatment facilities;

D O I：

10.2175/106143004X151563

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

High-rate clarification (HRC) processes are well suited for enhanced primary treatment of wet-weather flows in combined sewer systems. Suspended solids removal in excess of 75% of influent concentrations can be achieved consistently. Chemical oxygen demand and five-day biochemical oxygen demand removal are better than 60%. However, although optimal treatment could be achieved in a matter of minutes when the units were started full, a delay of up to one-half hour was observed when the units were started empty. Operational strategies that minimize this effect need to be developed in full-scale tests before HRC processes can be implemented with confidence in wet-weather-only facilities.

引用

页码：474 / 480

页数：7