利用还原氧化石墨烯增强城市固体废物厌氧消化中的生物甲烷。
Biomethane enhancement using reduced graphene oxide in anaerobic digestion of municipal solid waste.
机构信息
Department of Environmental Engineering, Nigde Omer Halisdemir University, Nigde 51240, Turkey.
Department of Environmental Engineering, Nigde Omer Halisdemir University, Nigde 51240, Turkey; Department of Energy Science and Technologies, Nigde Omer Halisdemir University, Nigde 51240, Turkey.
出版信息
Bioresour Technol. 2022 Jun;354:127163. doi: 10.1016/j.biortech.2022.127163. Epub 2022 Apr 13.
The present research investigated the impact of reduced graphene oxide (rGO) addition on the semi-continuous anaerobic digestion of the organic fraction of municipal solid waste (OFMSW) in the range of 0.5-10 gVolatileSolid(VS)/Lday organic loading rates (OLR). Adding rGO enhanced the rate and yield of biomethane production, and the maximum biomethane increment rate was obtained as 110% at an OLR of 4.0 gVS/Lday. However, after increasing the OLR to 6 gVS/Lday, there was a dramatic decrease in biomethane production because of volatile fatty acid (VFA) accumulation. Methanotrix is the predominant archaeal genus at OLRs lower than 6 gVS/Lday in reactors (89-97%). An increment in biomethane production was associated with the higher abundance of the Methanothrix genus in the rGO-supported reactor (rG) than in the control reactor (rC).
本研究考察了在 0.5-10 gVolatileSolid(VS)/Lday 有机负荷率 (OLR)范围内，添加还原氧化石墨烯 (rGO) 对城市固体废物有机部分 (OFMSW) 半连续厌氧消化的影响。添加 rGO 提高了生物甲烷生成的速率和产率，在 OLR 为 4.0 gVS/Lday 时，最大生物甲烷增量速率达到 110%。然而，当 OLR 增加到 6 gVS/Lday 时，由于挥发性脂肪酸 (VFA) 的积累，生物甲烷的生成量急剧下降。在低于 6 gVS/Lday 的 OLR 下，甲烷菌是反应器中主要的古菌属（89-97%）。rGO 支持的反应器 (rG) 中 Methanothrix 属的丰度高于对照反应器 (rC)，与生物甲烷产量的增加有关。
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