Alternative Fuels Research Laboratory (AFRL), Energy Division, Department of Mechanical Engineering, Faculty of Engineering, Erciyes University, 38039 Kayseri, Turkey; Department of Mechanical Engineering, Faculty of Engineering, Siirt University, 56100 Siirt, Turkey.
Alternative Fuels Research Laboratory (AFRL), Energy Division, Department of Mechanical Engineering, Faculty of Engineering, Erciyes University, 38039 Kayseri, Turkey.
Bioresour Technol. 2021 Feb;322:124470. doi: 10.1016/j.biortech.2020.124470. Epub 2020 Dec 3.
The effect of oil extraction from spent coffee grounds as a pre-treatment strategy prior to anaerobic digestion besides assessing the feasibility of defatted spent coffee grounds co-digestion with spent tea waste, glycerin, and macroalgae were examined. Mesophilic BMP tests were performed using defatted spent coffee grounds alongside four co-substrates in the ratio of 25, 50, and 75%, respectively. The highest methane yield was obtained with the mono-digestion of defatted spent coffee grounds with 336 ± 7 mL CH/g VS and the yield increased with the increase in the mass ratio of defatted spent coffee grounds during co-digestion. Moreover, defatted spent coffee grounds showed the highest VS and TS removal at 35.5% and 32.1%, respectively and decreased thereafter. Finally, a linear regression model for the interaction effects between substrates was demonstrated and showed that distinctly mixing defatted spent coffee grounds, spent coffee grounds, and spent tea waste outperforms other triple mixed substrates.
研究了从废咖啡渣中提取油作为预处理策略对厌氧消化的影响，同时评估了脱脂废咖啡渣与废茶叶、甘油和大型藻类共消化的可行性。使用脱脂废咖啡渣与四种共底物以 25%、50%和 75%的比例进行中温 BMP 测试。用脱脂废咖啡渣进行单消化时，甲烷产量最高，为 336±7mL CH/g VS，随着共消化中脱脂废咖啡渣质量比的增加，产率也随之增加。此外，脱脂废咖啡渣在 VS 和 TS 的去除率分别达到 35.5%和 32.1%，随后呈下降趋势。最后，还展示了一种用于底物相互作用效应的线性回归模型，表明将脱脂废咖啡渣、废咖啡渣和废茶叶明显混合的效果优于其他三种混合底物。
