污泥停留时间对浸没式渗透膜生物反应器中污泥特性和膜污染的影响。
Impacts of sludge retention time on sludge characteristics and membrane fouling in a submerged osmotic membrane bioreactor.
机构信息
Laboratory of Environmental Biotechnology, School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, PR China.
Laboratory of Environmental Biotechnology, School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, PR China.
出版信息
Bioresour Technol. 2014 Jun;161:340-7. doi: 10.1016/j.biortech.2014.03.058. Epub 2014 Mar 21.
Sludge retention time (SRT) is a feasible method to alleviate the salt accumulation in the osmotic membrane bioreactor (OMBR) by discharging the waste activated sludge. In this study, effects of SRT on sludge characteristics and membrane fouling were investigated using a submerged OMBR under two SRTs of 10 and 15d. The results showed that the lower SRT was helpful for alleviating the salt accumulation and flux decline. Besides that, the removal of NH3-N was significantly influenced by SRT. SRT also had a strong effect on soluble microbial products (SMP) and microbial activity due to the variation of salinity. Microbial diversity analysis indicated that the high salinity environment in the OMBR significantly affected the microbial communities. The flux decline in the OMBR was mainly attributed to the reduced driving force resulting from the salt accumulation, and the reversible fouling was the dominant forward osmosis (FO) membrane fouling in the OMBR.
污泥停留时间（SRT）是一种通过排放剩余活性污泥来缓解渗透膜生物反应器（OMBR）中盐分积累的可行方法。本研究采用浸没式 OMBR，在两种 SRT（10d 和 15d）下，考察了 SRT 对污泥特性和膜污染的影响。结果表明，较低的 SRT 有助于缓解盐分积累和通量下降。此外，SRT 对 NH3-N 的去除也有显著影响。由于盐度的变化，SRT 对可溶性微生物产物（SMP）和微生物活性也有很强的影响。微生物多样性分析表明，OMBR 中的高盐环境显著影响了微生物群落。OMBR 中的通量下降主要归因于盐积累导致的驱动力降低，而可恢复性污染是 OMBR 中正向渗透（FO）膜污染的主要形式。
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