School of Civil Engineering, Wuhan University, Wuhan, China.
School of Civil Engineering, Wuhan University, Wuhan, China.
Bioresour Technol. 2022 May;352:127092. doi: 10.1016/j.biortech.2022.127092. Epub 2022 Mar 30.
This study evaluated the effectiveness of shrimp shell biochar (SBC) and nickel (Ni) loaded SBC in increasing methane yield during anaerobic digestion of food waste. The results indicated that the methane yields of control (without SBC), SBC, SBC loaded with the low concentration of Ni, and SBC loaded with the high concentration of Ni were 81.8, 116.1, 134.7, and 99.2 mL/(g·VS), respectively. SBC promoted the efficiency and stability of the whole anaerobic digestion process including hydrolysis, volatile fatty acid conversion and methanogenesis. While the invigorating effect of loaded Ni at the low concentration of 0.88 mg/g was mainly concentrated in methanogenesis, the inhibition effect of the high Ni concentration was comprehensive. SBC helped Methanosarcina proliferation, and low concentration Ni promoted the number and activity of Methanosarcina and Methanosaeta. The results show that biochar loaded with a low level of trace elements such as Ni can promote the anaerobic digestion process.
本研究评估了虾壳生物炭（SBC）和负载镍（Ni）的 SBC 提高食物垃圾厌氧消化中甲烷产量的效果。结果表明，对照（无 SBC）、SBC、低浓度 Ni 负载的 SBC 和高浓度 Ni 负载的 SBC 的甲烷产量分别为 81.8、116.1、134.7 和 99.2 mL/（g·VS）。SBC 促进了水解、挥发性脂肪酸转化和产甲烷整个厌氧消化过程的效率和稳定性。而低浓度 0.88 mg/g 的负载 Ni 的激发作用主要集中在产甲烷阶段，高 Ni 浓度的抑制作用则是全面的。SBC 有助于 Methanosarcina 的增殖，低浓度 Ni 促进了 Methanosarcina 和 Methanosaeta 的数量和活性。结果表明，负载如 Ni 等微量元素的生物炭可以促进厌氧消化过程。
