School of Civil and Environmental Engineering, University of Technology, Sydney (UTS), Post Box 129, Broadway, NSW 2007, Australia; School of Civil, Environmental and Architectural Engineering, Korea University, 1-5 Ga, Anam-Dong, Seongbuk-Gu, Seoul 136-713, Republic of Korea.
King Abdullah University of Science and Technology (KAUST), Water Desalination and Reuse Center (WDRC), Division of Biological & Environmental Science & Engineering (BESE), Thuwal 23955-6900, Saudi Arabia.
Bioresour Technol. 2017 Sep;240:149-156. doi: 10.1016/j.biortech.2017.02.098. Epub 2017 Feb 27.
In this study, a side-stream anaerobic fertilizer-drawn forward osmosis (FDFO) and ultrafiltration (UF) membrane bioreactor (MBR) hybrid system was proposed and operated for 55days. The FDFO performance was first investigated in terms of flux decline with various fertilizers draw solution. Flux decline was very severe with all fertilizers due to the absence of aeration and the sticky property of sludge. Flux recovery by physical cleaning varied significantly amongst tested fertilizers which seriously affected biofouling in FDFO via reverse salt flux (RSF). Besides, RSF had a significant impact on nutrient accumulation in the bioreactor. These results indicated that nutrient accumulation negatively influenced the anaerobic activity. To elucidate these phenomena, bacterial and archaeal community structures were analyzed by pyrosequencing. Results showed that bacterial community structure was affected by fertilizer properties with less impact on archaeal community structure, which resulted in a reduction in biogas production and an increase in nitrogen content.
在这项研究中，提出并运行了一种侧流厌氧肥料汲取正向渗透（FDFO）和超滤（UF）膜生物反应器（MBR）混合系统，该系统运行了 55 天。首先，针对各种肥料汲取液研究了 FDFO 的性能，结果表明，由于缺乏曝气和污泥粘性，所有肥料的通量都严重下降。通过物理清洗进行的通量恢复在测试的肥料之间差异很大，这严重影响了 FDFO 中的生物结垢，因为反向盐通量（RSF）。此外，RSF 对生物反应器中的养分积累有重大影响。这些结果表明，养分积累会对厌氧活性产生负面影响。为了阐明这些现象，通过焦磷酸测序分析了细菌和古菌群落结构。结果表明，肥料特性会影响细菌群落结构，而对古菌群落结构的影响较小，这导致沼气产量减少和氮含量增加。
