Chen Rong, Nie Yulun, Ji Jiayuan, Utashiro Tetsuya, Li Qian, Komori Daisuke, Li Yu-You
International S&T Cooperation Center for Urban Alternative Water Resources Development, Key Lab of Environmental Engineering, Shaanxi Province, Xi'an University of Architecture and Technology, No. 13 Yanta Road, Xi'an 710055, China; Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan E-mail:
Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China; These two author contributed equally to this work and should be considered co-first authors.
Water Sci Technol. 2017 Sep;76(5-6):1308-1317. doi: 10.2166/wst.2017.240.
A submerged anaerobic membrane reactor (SAnMBR) was employed for comprehensive evaluation of sewage treatment at 25 °C and its performance in removal efficiency, biogas production and membrane fouling. Average 89% methanogenic degradation efficiency as well as 90%, 94% and 96% removal of total chemical oxygen demand (TCOD), biochemical oxygen demand (BOD) and nonionic surfactant were obtained, while nitrogen and phosphorus were only subjected to small removals. Results suggest that SAnMBRs can effectively decouple organic degradation and nutrients disposal, and reserve all the nitrogen and phosphorus in the effluent for further possible recovery. Small biomass yields of 0.11 g mixed liquor volatile suspended solids (MLVSS)/gCOD were achieved, coupled to excellent methane production efficiencies of 0.338 NLCH/gCOD, making SAnMBR an attractive technology characterized by low excess sludge production and high bioenergy recovery. Batch tests revealed the SAnMBR appeared to have the potential to bear a high food-to-microorganism ratio (F/M) of 1.54 gCOD/gMLVSS without any inhibition effect, and maximum methane production rate occurred at F/M 0.7 gCOD/gMLVSS. Pore blocking dominated the membrane fouling behaviour at a relative long hydraulic retention time (HRT), i.e. >12 hours, while cake layer dominated significantly at shorter HRTs, i.e. <8 hours.
采用浸没式厌氧膜生物反应器（SAnMBR）在25℃下对污水处理进行综合评估，考察其在去除效率、沼气产量和膜污染方面的性能。总化学需氧量（TCOD）、生化需氧量（BOD）和非离子表面活性剂的去除率分别达到90%、94%和96%，产甲烷降解效率平均为89%，而氮和磷的去除率较低。结果表明，SAnMBR能够有效分离有机降解和营养物处理，将所有氮和磷保留在出水中以便进一步回收利用。混合液挥发性悬浮固体（MLVSS）的产率仅为0.11 g/gCOD，同时甲烷产量效率高达0.338 NLCH/gCOD，使得SAnMBR成为一种具有低剩余污泥产量和高生物能源回收率的有吸引力技术。批次试验表明，SAnMBR在食物微生物比（F/M）高达1.54 gCOD/gMLVSS时无抑制作用，最大甲烷产率出现在F/M为0.7 gCOD/gMLVSS时。在较长水力停留时间（HRT）（即>12小时）时，膜污染主要由孔堵塞主导，而在较短HRT（即<8小时）时，滤饼层起主导作用。
