Beijing Key Lab for Source Control Technology of Water Pollution, Beijing Forestry University, Beijing 100083, China; College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China.
College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China.
Bioresour Technol. 2018 Nov;268:700-707. doi: 10.1016/j.biortech.2018.08.002. Epub 2018 Aug 19.
This work elucidates the effects of model reversed salt MgCl on methane production in an anaerobic digestion bioreactor treating waste sludge. Along with MgCl concentration being raised stepwise, the methane production was only slightly less than in the control when MgCl was 20 g/L and under, and then suddenly reduced to only about 10 mL/(L·d) at a MgCl concentration of 30 g/L, and finally stopped when the MgCl concentration reached 50 g/L. However, the total relative abundance of methanogens Methanomicrobia and Methanobacteria still accounted for 84.97% of the archaeal community when MgCl was 50 g/L. The high correlation between live/dead cell ratio and methane production suggests that the live/dead cell ratio instead of the inhibition of methanogen might be the major cause for the halt of methane production at a magnesium chloride concentration of 50 g/L.
本研究阐明了模型反盐 MgCl 对处理剩余污泥的厌氧消化生物反应器中甲烷生成的影响。随着 MgCl 浓度逐步升高，当 MgCl 为 20 g/L 及以下时，甲烷生成量仅略低于对照，然后在 MgCl 浓度为 30 g/L 时突然降至约 10 mL/(L·d)，当 MgCl 浓度达到 50 g/L 时最终停止。然而，当 MgCl 浓度为 50 g/L 时，甲烷菌 Methanomicrobia 和 Methanobacteria 的总相对丰度仍占古菌群落的 84.97%。活/死细胞比与甲烷生成量之间的高度相关性表明，活/死细胞比而不是甲烷菌的抑制可能是在 50 g/L 氯化镁浓度下甲烷生成停止的主要原因。
