摘要
使用序批式活性污泥反应器研究了污泥停留时间(SRT)对出口水质的影响,进而获得适宜的运行参数。以人工合成生活污水为目标处理物,以污水处理厂剩余污泥和二沉池池壁藻类混合为系统启动菌藻共生物,在HRT为10 h、温度为(25±1)℃、pH为6~7、进水相同等其他参数不变的情况下,改变污泥停留时间(SRT),考查出口水质以及污泥性质,从而获得污水处理效果优化的SRT。结果表明,SRT为10 d时,叶绿素a含量下降快,藻类大量流失;当SRT为25 d时,出口水质好、藻类稳定存在且菌藻共生体絮凝效果良好;当SRT为50 d时,污泥老化现象严重,水处理效果差。综合考虑以SRT为25 d处理生活污水为佳。
In this research, Sequencing Batch Reactor （SBR） was used to study the influence of Sludge Retention Time （SRT） on the effluent quality, in order to get the most suitable parameters of the reactor. Excess sludge and algae from the secondary sedimentation tank were used as the algal-microbe symbiotic in a self-made SBR in the laboratory. The HRT was 6 h, while the temperature was 24-26 ℃ with the pH from 6-7 in the whole system. The system has been operating stably in the same condition. The SRT was changed without other changes to get the SRT data with which the system got the best treatment effect considering the effluent quality and quantity. It was illustrated in this research that when the SRT was 10 d, the content of chlorophyll a decreased and algae reduced. When the SRT was 25 d, the effluent got the best quality and the flocculation effect was good with the stable algae. While the SRT was 50 d, the sludge aged and got no more good performance. Taking overall effects into consideration, the optimal SRT should be 25d.
出处
《水处理技术》
CAS
CSCD
北大核心
2017年第1期52-56,61,共6页
Technology of Water Treatment
基金
广东省广州市市政工程设计研究院城市环境治理院士工作站(2013B090400006)
