Indicator microorganisms and pathogens removal function performed by copepods in constructed wetlands

被引：12

作者：

Song, Z. W. ^{[1
]}

Wu, L. ^{[1
]}

Yang, G. ^{[1
]}

Xu, M. ^{[1
]}

Wen, S. P. ^{[1
]}

机构：

[1] Qingdao Technol Univ, Inst Environm & Municipal Engn, Qingdao 266033, Peoples R China

来源：

BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY | 2008年 / 81卷 / 05期

基金：

中国国家自然科学基金;

关键词：

constructed wetlands; copepods; indicator microorganism; pathogen;

D O I：

10.1007/s00128-008-9527-1

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Removal efficiency of indicator and pathogenic microorganisms in constructed wetlands were analyzed, and microorganisms removal function performed by copepods was determined. The results showed that the constructed wetlands effectively reduced Escherichia coli, fecal streptococci, total coliforms, and fecal coliforms, the Salmonella spp. removal efficiency was relatively low and the Clostridium perfringens removal was the least. At copepods concentrations of 3.0 x 10(2)/L, and 6.0 x 10(2)/L, high die-off rates were observed for indicator and pathogenic microorganisms compared to the control group, and indicator and pathogenic microorganisms in samples with higher concentration of copepods decreased much more rapidly than those in samples with lower concentration. These results suggest that predation by copepods is an important mechanism for the removal of bacteria in constructed wetlands.

引用

页码：459 / 463

页数：5