State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, College of Environmental Science and Engineering, Donghua University, Shanghai 201620, PR China.
State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, College of Environmental Science and Engineering, Donghua University, Shanghai 201620, PR China.
Bioresour Technol. 2017 Nov;244(Pt 1):750-758. doi: 10.1016/j.biortech.2017.08.040. Epub 2017 Aug 10.
In this study, a SCA reactor was employed for municipal wastewater treatment at a mesophilic temperature (30°C) under different hydraulic retention times (HRT) and upflow velocities (V) to investigate granule sludge stability and spatial microbial distribution. The stable COD removal efficiency readied at HRT of 15, 12, 9 and 6h, and V ranging from 0.6 to 5.9mh. EPS fraction analysis of granule sludge shows that municipal wastewater was mainly attributed to the enrichment influence of polysaccharide and tightly bound-EPS. SEM images exhibited that the stability and floating of anaerobic granular sludge may be promoted in the primary three-phase separator area because the channels of the granules was clogged by EPS. The SMA and high-throughput sequencing analysis indicated acetoclastic methanogens and hydrogenotrophic methanogens played an important role in formation and maintenance of the anaerobic granule sludge in low and high organic load rate operation conditions.
在这项研究中，采用 SCA 反应器在中温（30°C）下进行城市废水处理，在不同水力停留时间（HRT）和上流速度（V）下，以研究颗粒污泥的稳定性和空间微生物分布。在 HRT 为 15、12、9 和 6h 以及 V 为 0.6 至 5.9mh 的条件下，实现了稳定的 COD 去除效率。颗粒污泥的 EPS 分数分析表明，城市废水主要归因于多糖和紧密结合的-EPS 的富集影响。SEM 图像表明，由于颗粒的通道被 EPS 堵塞，厌氧颗粒污泥的稳定性和浮起可能在初级三相分离器区域得到促进。SMA 和高通量测序分析表明，在低有机负荷率和高有机负荷率运行条件下，乙酸营养型产甲烷菌和氢营养型产甲烷菌在厌氧颗粒污泥的形成和维持中起着重要作用。
