School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; Key Lab of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, China; International Science & Technology Cooperation Center for Urban Alternative Water Resources Development, Xi'an 710055, China.
School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; Key Lab of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, China; International Science & Technology Cooperation Center for Urban Alternative Water Resources Development, Xi'an 710055, China; Engineering Technology Research Center for Wastewater Treatment and Reuse, Shaanxi Province, China.
Bioresour Technol. 2017 Jul;236:164-173. doi: 10.1016/j.biortech.2017.03.186. Epub 2017 Apr 2.
Fermentation liquid of food waste (FLFW) was applied as an external carbon source in a pilot-scale anoxic/oxic-membrane bioreactor (A/O-MBR) system to enhance nitrogen removal for treating low COD/TN ratio domestic wastewater. Results showed that, with the FLFW addition, total nitrogen removal increased from lower than 20% to 44-67% during the 150days of operation. The bacterial metabolic activities were obviously enhanced, and the significant change in microbial community structure promoted pollutants removal and favored membrane fouling mitigation. By monitoring transmembrane pressure and characterizing typical membrane foulants, such as extracellular polymeric substances (EPS), dissolved organic matter (DOM), and inorganics and biopolymers in the cake layer, it was confirmed that FLFW addition did not bring about any additional accumulation of membrane foulants, acceleration of fouling rate, or obvious irreversible membrane fouling in the whole operation period. Therefore, FLFW is a promising alternative carbon source to enhance nitrogen removal for the A/O-MBR system.
采用厨余垃圾发酵液（FLFW）作为外加碳源，在中试规模缺氧/好氧-膜生物反应器（A/O-MBR）系统中强化脱氮，以处理低 COD/TN 比的生活污水。结果表明，在 FLFW 投加条件下，系统运行 150d 内总氮去除率由低于 20%提高至 44-67%。细菌代谢活性明显增强，微生物群落结构的显著变化促进了污染物的去除，并有利于减缓膜污染。通过监测跨膜压力和表征典型的膜污染物，如胞外聚合物（EPS）、溶解有机物（DOM）以及在滤饼层中的无机物和生物聚合物，证实整个运行期间添加 FLFW 并没有导致膜污染物的额外积累、污染速率的加快或明显的不可逆膜污染。因此，FLFW 是一种很有前景的替代碳源，可以增强 A/O-MBR 系统的脱氮能力。
