University of Warmia and Mazury in Olsztyn, Department of Environment Engineering, Warszawska 117, 10-720 Olsztyn, Poland.
University of Warmia and Mazury in Olsztyn, Department of Environmental Biotechnology, Słoneczna 45G, 10-709 Olsztyn, Poland.
Bioresour Technol. 2021 Mar;323:124600. doi: 10.1016/j.biortech.2020.124600. Epub 2020 Dec 23.
Dairy wastewater is characterized by high concentration of organic compounds and is commonly used for energy production. Methods for enhancement of biogas production include application of magnetizers on the digester to induce static magnetic field (SMF). The study aimed at investigation of Bacteria and Archaea communities during anaerobic digestion of model dairy wastewater exposed to SMF. Magnetic field caused a significant increase in methane production to 373.2 mL/g VS compared to 200.2 mL/g VS in a control reactor and methane content to 56.8% compared to 49.1% in a control reactor. In both reactors, the biomass was dominated by Trichococcus sp. The relative abundance of lactic acid bacteria was of about 10% higher in the reactor exposed to SMF. This higher number of Lactobacillales resulted from a higher acetate production, which additionally caused enhanced growth of Methanosarcinacaea in the reactor exposed to SMF. SMF also stimulated the growth of hydrogenotrophic methanogens.
乳制品废水的特点是有机化合物浓度高，常用于能源生产。提高沼气产量的方法包括在消化器上应用磁铁以产生静磁场 (SMF)。本研究旨在研究在 SMF 作用下厌氧消化模型乳制品废水中细菌和古菌群落的变化。磁场使甲烷产量显著增加，从对照反应器中的 200.2 毫升/克 VS 增加到 373.2 毫升/克 VS，甲烷含量从对照反应器中的 49.1%增加到 56.8%。在两个反应器中，生物质都以 Trichococcus sp. 为主。在暴露于 SMF 的反应器中，乳酸菌的相对丰度高约 10%。这种数量更多的乳杆菌目是由于乙酸盐产量增加所致，这又导致暴露于 SMF 的反应器中 Methanosarcinacaea 的生长增强。SMF 还刺激了氢营养型产甲烷菌的生长。
