Abstract:

To examine the stability of carrier anaerobic baffled reactor(CABR)treating low concentration domestic sewage, the macroscopic performance, catabolic intermediate and microbial activities of CABR were investigated at different hydraulic retention times(HRTs)and different temperatures.The results showed that: ① The change from “L” shape to “\” shape of the TCOD removal curve throughout the reactor suggested qualitatively the decline of shock resistance potential, and the invariability of volumetric removal rate with increasing shock load indicated quantitatively the shortage of buffer capacity.② The increase of the ratio of soluble microbial products(SMP)/ soluble chemical oxygen demand(SCOD)along the flow-direction and the ratio of volatile fatty acid(VFA)/alkalinity less than 0.11 implied excellent potential of shock resistance.③ The decline of shock resistance could be indicated by the decrease of microbial activities.It was also demonstrated that CABR showed the best shock resistance potential at 28℃ but the worst potential at 10℃.The stability of CABR under short-term hydraulic shock load declined as temperature decreased.

Key words: 填料式厌氧折流板反应器, 短期水力冲击负荷, 分散式生活污水

摘要：

为考察填料式厌氧折流板反应器（CABR）处理分散式生活污水的稳定性，从宏观运行性能、中间产物积累以及微观微生物活性三个层次来表征和评价不同温度下CABR处理低浓度生活污水抗水力冲击负荷潜能。从宏观运行性能指标可知：呈现“L”的TCOD沿程曲线可定性表征较佳的反应器抗冲击负荷潜能，冲击力度加大而容积负荷去除率不变则表明反应器已无缓冲性能；从中间产物累积情况可知：可溶性微生物产物（SMP）/可溶性化学需氧量（SCOD）比值沿着CABR水流方向呈上升趋势，挥发性脂肪酸（VFA）/碱度的比值小于0.11时表明CABR抗水力冲击负荷潜能较佳；从微生物活性可知：受到水力负荷冲击时，微生物活性

关键词: 填料式厌氧折流板反应器, 短期水力冲击负荷, 分散式生活污水