Crone Brian C, Sorial George A, Pressman Jonathan G, Ryu Hodon, Keely Scott P, Brinkman Nichole, Bennett-Stamper Christina, Garland Jay L
United States Environmental Protection Agency, Office of Research and Development, Center for Environmental Solutions and Emergency Response, United States of America.
Department of Chemical and Environmental Engineering, University of Cincinnati, United States of America.
Bioresour Technol Rep. 2020 Jun 1;10:100407. doi: 10.1016/j.biteb.2020.100407.
Anaerobic treatment of domestic wastewater (DWW) produces dissolved methane that needs to be recovered for use as an energy product. Membrane-based recovery systems have been reported in the literature but are often limited by fouling. The objective of this study was to develop a methane producing biofilm on the shell side surface a membrane to allow for immediate recovery of methane as it was produced, negating mass transfer resistance caused by fouling. Between 89 and 96% of total methane produced was recovered via in-situ degassing without the need for fouling control or cleaning throughout 72 weeks of operation. High methane recovery efficiencies led to predictions of net positive energy yield in one reactor and a 32-61% reduction in energy demand in the others compared to the control. This research demonstrates the feasibility and usefulness of combining attached growth anaerobic wastewater treatment processes with hollow fiber membrane methane recovery systems for improved operation.
生活污水的厌氧处理会产生溶解态甲烷，需要对其进行回收以用作能源产品。文献中已报道了基于膜的回收系统，但这些系统常常受到污垢的限制。本研究的目的是在膜的壳侧表面形成产甲烷生物膜，以便在甲烷产生时能立即进行回收，消除由污垢导致的传质阻力。在72周的运行过程中，通过原位脱气回收了89%至96%的总产甲烷量，无需进行污垢控制或清洗。与对照相比，高甲烷回收效率使得一个反应器预测有净正能量产出，其他反应器的能源需求降低了32%至61%。本研究证明了将附着生长厌氧废水处理工艺与中空纤维膜甲烷回收系统相结合以改善运行的可行性和实用性。
