Civil Engineering School, University of Costa Rica, San José, Costa Rica; Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais, Brazil.
Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais, Brazil.
Bioresour Technol. 2023 Jan;367:128223. doi: 10.1016/j.biortech.2022.128223. Epub 2022 Nov 9.
Biogas is a source of renewable energy, and its production and use has been validated in anaerobic-based sewage treatment plants (STPs). However, in these systems, a large amount of methane is lost as dissolved methane (D-CH) in the liquid effluent. In this study, the characteristics and potential energetic uses of the gas recovered during the desorption of D-CH from anaerobic effluents with hollow fibre membrane contactors were investigated. A pilot-scale experiment was performed using sewage and two types of membrane contactors. The recovered gas contained considerable amounts of CH, CO, HS, N, and O; therefore, a gas upgrade is required prior to its use as a biofuel. The recovery process should be energetically self-sustainable, and induce a considerable decrease in the STP carbon footprint. Recovering D-CH with membrane contactors could increase the energetic potential of anaerobic-based STPs up to 50 % and allow for more sustainable systems.
沼气是一种可再生能源，其生产和利用已在基于厌氧的污水处理厂（STP）中得到验证。然而，在这些系统中，大量的甲烷作为溶解甲烷（D-CH）在液体废水中流失。在这项研究中，研究了用中空纤维膜接触器从厌氧废水中解吸 D-CH 时回收气体的特性和潜在的能量用途。使用污水和两种类型的膜接触器进行了中试实验。回收的气体含有相当数量的 CH、CO、HS、N 和 O；因此，在将其用作生物燃料之前，需要对其进行气体升级。回收过程应该是自给自足的，并能显著降低 STP 的碳足迹。用膜接触器回收 D-CH 可使基于厌氧的 STP 的能量潜力提高多达 50%，并使系统更加可持续。
