摘要
通过现场实验、生产性装置调研、生物培养和发光细菌的发光抑制性试验等手段,考察了受污染源水处理中微型后生动物种类、分布、演化规律,探讨了微型后生动物的种群结构和功能;研究了苔藓虫和椎实螺对源水生物处理的影响以及对后续常规处理和供水安全的潜在风险.结果表明,微型后生动物对污染源水的生物处理有一定的促进作用;苔藓虫和软体动物作为源水生物处理的特有后生动物,容易在生物膜上生长并对水质净化有一定促进作用.苔藓虫的死亡残体和虫体溶出物的毒性很弱,不会对人体造成危害.少量椎实螺的存在,有助于维持生物膜稳定;大量存在可啃食生物膜,影响除污效率.
Through on-site pilot experiments, full-scale treatment ponds, the microscopical observation of biofilm, distribution, succession and functions of metazoans in raw water biological treatment system were studied; and the functions and influence of bryozoan and Galba pervia to biological pretreatment and subsequent conventional water purification were also discussed. Metazoans could promote the biological purification of polluted raw water. Bryozoan and Galba pervia are specific species in raw water biological treatment pond; although CODMn of raw water was 6-Stag/L, the risk of outbreaking growth of bryozoan in suspended carriers was weak. The toxicities of the body and the exudated matters of bryozoan was weak and had light influence on drinking water safe supplying. Furthermore, the potential risk of water supplying safety of Galba pervia should be highlighted, if appearing in biological activated carbon filter, it could be killed by two or three times of normal concentration of chlorine disinfectant every two or three months.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2008年第12期1105-1110,共6页
China Environmental Science
基金
国家自然科学基金资助项目(50678118)
科技部支撑计划项目(2006BAJ08B06)
关键词
微型后生动物
源水生物处理
苔藓虫
椎实螺
发光细菌
metazoans
polluted raw water biological treatment
bryozoan
Galbapervia
luminescent bacteria
