通过淹没式膜促进 H 元素添加，实现污水污泥厌氧消化中的沼气原位升级。
H addition through a submerged membrane for in-situ biogas upgrading in the anaerobic digestion of sewage sludge.
机构信息
Department of Chemical Engineering and Environmental Technology, Escuela de Ingenierías Industriales, Sede Dr. Mergelina, University of Valladolid, Dr. Mergelina s/n, 47011 Valladolid, Spain.
Department of Chemical Engineering and Environmental Technology, Escuela de Ingenierías Industriales, Sede Dr. Mergelina, University of Valladolid, Dr. Mergelina s/n, 47011 Valladolid, Spain; Institute of Sustainable Processes, University of Valladolid, Dr. Mergelina s/n, 47011 Valladolid, Spain.
出版信息
Bioresour Technol. 2019 May;280:1-8. doi: 10.1016/j.biortech.2019.01.135. Epub 2019 Jan 30.
In-situ upgrading of biogas in a mesophilic anaerobic digester of sewage sludge by sparging H through a membrane was studied. Large gas recirculation rates were required to facilitate H transfer to the bulk liquid phase; at ∼200 L L d, H utilization efficiency averaged 94% and the specific CH production increased from 0.38 L L d, during conventional digestion, to 0.54 L L d. Sludge digestion was not compromised by elevated H partial pressure nor by the associated rise in the pH (8.1) because of CO removal. In this regard, VFA accumulation was not detected and the performance of VS removal was similar to the observed without H supply. Microbial analysis revealed that homoacetogens were outcompeted by hydrogenotrophic methanogens. Methanoculleus sp., Methanospirillum sp., Methanolinea sp. and Methanobacterium sp. were the hydrogenotrophic archaea present over the experiment.
通过膜曝气向中温厌氧消化器中的沼气中注入 H 以实现原位升级，研究了这一过程。为了促进 H 向液相主体的转移，需要大的气体循环速率；在 200 L/L/d 的条件下，H 的利用率平均为 94%，并且与传统消化相比，特定 CH 产量从 0.38 L/L/d 增加到 0.54 L/L/d。由于 CO 的去除，升高的 H 分压和随之而来的 pH（8.1）并没有损害污泥消化，因为 CO 的去除，VFA 的积累没有被检测到，VS 去除的性能与没有 H 供应时观察到的相似。微生物分析表明，同型产乙酸菌被氢营养型产甲烷菌所淘汰。在整个实验过程中，存在产甲烷球菌属、产甲烷螺菌属、产甲烷八叠球菌属和甲烷杆菌属等氢营养型古菌。
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