Legesse Henok Akililu, Debele Wagene Hailu, Wachemo Akiber Chufo
Department of Water Supply and Environmental Engineering, Arba Minch Water Technology Institute (AWTI), P. O. Box 21, Arba Minch, Ethiopia.
Adigrat University, College of Engineering and Technology (CET), Department of Civil Engineering, Water Supply and Environmental Engineering Stream, P. O. Box 50, Adigrat, Ethiopia.
Heliyon. 2024 Dec 11;10(24):e41124. doi: 10.1016/j.heliyon.2024.e41124. eCollection 2024 Dec 30.
Anaerobic digestion technology is one of the most paramount eco-friendly wastes to energy conversion processes. This study was conducted to characterize the physicochemical properties of khat and Cow dung along with examining the bio-methane production potential and substrate conversion rate of feedstock through seven triplicate proportions of laboratory scale batch anaerobic reactors for a 27 days digestion period under mesophilic conditions. The maximum and minimum bio-methane yield of 283.52 ± 7.17 CH mL/g VS and 142.83 ± 3.56 CH mL/g VS were generated from the digester, with the higher proportion of Khat waste in the T-5 (2:1) and the sole substrate anaerobic digestion of Cow dung in T-7 (0:1) respectively. The conversion rates of cellulose and hemicellulose components from Khat waste were 44.4 and 47.2 %, respectively. The result demonstrates that the anaerobic co-digestion of khat waste and cow dung plays a critical role in enhanced biomethane production due to effective synergism.
厌氧消化技术是最主要的将环保型废物转化为能源的过程之一。本研究旨在表征阿拉伯茶和牛粪的物理化学性质，同时通过七个重复比例的实验室规模间歇式厌氧反应器，在中温条件下进行为期27天的消化，考察原料的生物甲烷生产潜力和底物转化率。消化器产生的最大和最小生物甲烷产量分别为283.52±7.17 CH mL/g VS和142.83±3.56 CH mL/g VS，分别来自T-5（2:1）中较高比例的阿拉伯茶废料和T-7（0:1）中牛粪的单一底物厌氧消化。阿拉伯茶废料中纤维素和半纤维素成分的转化率分别为44.4%和47.2%。结果表明，由于有效的协同作用，阿拉伯茶废料和牛粪的厌氧共消化在提高生物甲烷产量方面起着关键作用。
