School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China; Collaborative Innovation Center of Coalbed Methane and Shale Gas for Central Plains Economic Region, Jiaozuo 454000, China.
School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China.
Bioresour Technol. 2021 Oct;337:125437. doi: 10.1016/j.biortech.2021.125437. Epub 2021 Jun 29.
The anaerobic degradation of coal combined with straw biomass can promote the methane production. The biogas production potential and metabolic pathway were explored via the co-digestion simulation experiment of coal and corn straw. The results showed that 2 g of corn straw combined respectively with 4 g of bituminous coal A, 6 g of bituminous coal B and 4 g of bituminous coal C resulted in highest methane yields. The structure of lignocellulose in corn straw was partially degraded into guaiacyl and syringyl units. Meanwhile, the content of biodegradable tyrosine like protein and soluble microbial by-products in liquid phase significantly decreased. Significantly, the structure of archaea altered from aceticlastic to hydrogenotrophic methanogens when the fermentation substrate changed from high to low rank coal. The proportion of hydrogenotrophic methanogens was significantly higher than that of aceticlastic and methylotrophic methanogens, and the hydrogenotrophic pathway was dominant than the aceticlastic pathway.
煤与秸秆生物质共降解可促进甲烷生成。通过煤与玉米秸秆的共消化模拟实验，探索了沼气产生潜力和代谢途径。结果表明，2g 玉米秸秆分别与 4g 烟煤 A、6g 烟煤 B 和 4g 烟煤 C 结合，可获得最高的甲烷产量。玉米秸秆中的木质纤维素结构部分降解为愈创木基和丁香基单元。同时，液相中可生物降解的酪氨酸样蛋白和可溶性微生物副产物的含量显著降低。值得注意的是，当发酵底物由高变质煤变为低变质煤时，古菌的结构从乙酸营养型转变为氢营养型产甲烷菌。氢营养型产甲烷菌的比例显著高于乙酸营养型和甲基营养型产甲烷菌，且氢营养型途径占主导地位，而非乙酸营养型途径。
Zotero 插件