摘要
研究了用于处理生活污水的普通活性污泥反应器 (CAS)受到 2 ,4 二氯酚 (2 ,4 DCP)间歇性负荷冲击时 ,投加高效菌的生物强化系统和对照系统对污染物的响应及系统稳定性 ,并考察了长期运行过程中强化系统对目标污染物去除能力的变化 .结果表明 ,投加 5 %和 1 5 % 2 ,4 DCP复合高效菌的强化CAS系统 ,其对目标污染物的降解能力及抗负荷冲击能力得到显著提高 .当系统受到间歇性 2 ,4 DCP负荷冲击 [1 1 0 37～ 1 71 6 0mg/ (L·d) ]时 ,对于单次投菌后前 30日内发生的间歇性负荷冲击 ,强化系统有效保持了对目标污染物的强化效果 ;在无 2 ,4 DCP存在的情况下连续运行 70d ,当系统再次受到 2 ,4 DCP负荷冲击时 ,强化系统的强化效果与前几次相比已明显下降 ,不能够快速有效去除污染物并维持系统稳定 ,因此有必要再次投加高效菌 .
In this study, conventional activated sludge (CAS) systems, which were generally used to treat municipal wastewater, were modeled to receive intermittent 2,4-dichlorophenol (2,4-DCP) shock loadings. The response and stability of the CAS system augmented with special culture and the non-bioaugmented control CAS system under shock loading conditions were compared. The capability of the bioaugmented CAS systems to degrade 2,4-DCP under long-term continuous operation was investigated. Results showed that for the CAS systems with 5% and 15% special culture addition, their degradation of the target pollutants and resistance against shock loadings was enhanced significantly. When 2,4-DCP shock loading occurred within the first 30 days after single inoculation, the bioaugmented CAS systems maintained high degradation ability to the target pollutants. After 70 days continuous operation without 2,4-DCP in feed, when the CAS systems challenged 2,4-DCP again, the effect of bioaugmentation was greatly reduced and the CAS system failed to remove the pollutants and maintain the system stability effectively. Therefore, re-supplementation was needed for further treatment of 2,4-DCP.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2004年第4期59-64,共6页
Environmental Science
基金
国家自然科学基金资助项目 ( 2 963 70 10 )
北京师范大学青年基金资助项目
关键词
生物强化
高效菌
负荷冲击
2
4-二氯酚
bioaugmentation
special culture
shock loading
2,4-dichlorophenol
