Lu Yu-Qin, Liu Jin-Meng, Wang Xin-Hua, Li Xiu-Fen, Li Ye
Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China.
Zhejiang Huanke Engineering Design Co., Ltd., Hangzhou 310007, China.
Huan Jing Ke Xue. 2018 Jul 8;39(7):3240-3246. doi: 10.13227/j.hjkx.201712150.
In this study, a novel combined system for simultaneous recovery of bioelectricity and water from wastewater was developed by integrating anaerobic acidification and a forward osmosis (FO) membrane with a microbial fuel cell (AAFO-MFC). Conductivity was thought to be an important factor affecting the performance of the AAFO-MFC system. Thus, effects of conductivity on the performance of AAFO-MFC system in treating synthetic wastewater were investigated. The results indicated that a higher conductivity increased the bioelectricity production, owing to a reduction in the internal resistance. However, it resulted in a rapid decrease of FO water flux and a shorter operating time because of a severer membrane fouling. The conductivity had no impact on the water quality of the effluents. The total organic carbon (TOC) and total phosphorus (TP) concentrations in the FO permeate were less than 4 and 0.5 mg·L, respectively, at all conductivity levels. However, the rejection of the FO membrane for NH-N was lower at all conductivity levels. The optimal comprehensive performance of this system was obtained when the conductivity was maintained at 7-8 mS·cm. In this case, the AAFO-MFC system achieved continuous and relatively stable power generation, and the water flux of FO membrane was relatively stable during a long-term operation of approximately 29 days.
在本研究中，通过将厌氧酸化、正向渗透（FO）膜与微生物燃料电池（AAFO-MFC）集成，开发了一种用于同时从废水中回收生物电和水的新型组合系统。电导率被认为是影响AAFO-MFC系统性能的一个重要因素。因此，研究了电导率对AAFO-MFC系统处理合成废水性能的影响。结果表明，较高的电导率由于内阻降低而增加了生物电产量。然而，由于更严重的膜污染，它导致FO水通量迅速下降和运行时间缩短。电导率对出水水质没有影响。在所有电导率水平下，FO渗透液中的总有机碳（TOC）和总磷（TP）浓度分别小于4mg·L和0.5mg·L。然而，在所有电导率水平下，FO膜对NH-N的截留率较低。当电导率保持在7-8mS·cm时，该系统获得了最佳综合性能。在这种情况下，AAFO-MFC系统实现了连续且相对稳定的发电，并且在大约29天的长期运行期间，FO膜的水通量相对稳定。
