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.
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。
