Environmental and Chemical Technology Group, Department of Chemistry, Federal University of Ouro Preto, Campus Universitário Morro do Cruzeiro, Bauxita, s/n, 35400-000 Ouro Preto, Brazil.
Environmental and Chemical Technology Group, Department of Chemistry, Federal University of Ouro Preto, Campus Universitário Morro do Cruzeiro, Bauxita, s/n, 35400-000 Ouro Preto, Brazil.
Bioresour Technol. 2017 Dec;245(Pt A):66-72. doi: 10.1016/j.biortech.2017.08.110. Epub 2017 Aug 31.
This study evaluated the potential of energy generation using a combined heat and power co-generation system (CHP) from biogas produced during the anaerobic digestion of coffee husks (CH) pretreated with steam explosion. Pretreatment conditions assessed were time (1, 5, 15 and 60min) and temperature (120, 180 and 210°C). Polysaccharides solubilisation and biogas production were not correlated. While pretreatment with severities higher than 4 resulted in a highest solubilisation of cellulose, hemicelluloses and lignin; however, furans concentration in those cases hindered biomass biodegradation. Considering a CHP, all pretreatment conditions were worthwhile when compared to non-pretreated CH. The best condition was 120°C for 60min, in which a 2.37 severity showed the highest methane yield (144.96NmLCHgCOD) and electricity production (0.59kWhkgCH). However, even better results could be achieved using 120°C for only 5min, which would lead to a larger amount of CH daily processed.
本研究评估了利用沼气进行热电联产（CHP）的潜力，沼气是通过对经过蒸汽爆炸预处理的咖啡壳（CH）进行厌氧消化产生的。评估的预处理条件包括时间（1、5、15 和 60 分钟）和温度（120、180 和 210°C）。多糖的溶解和沼气的产生没有相关性。虽然预处理的严重程度高于 4 会导致纤维素、半纤维素和木质素的最大溶解，但在这些情况下呋喃的浓度会阻碍生物质的生物降解。考虑到 CHP，与未经预处理的 CH 相比，所有预处理条件都是值得的。最佳条件是 120°C 处理 60 分钟，其中 2.37 的严重程度表现出最高的甲烷产量（144.96NmLCHgCOD）和电力生产（0.59kWhkgCH）。然而，仅使用 120°C 处理 5 分钟可以获得更好的效果，这将导致每天处理更多的 CH。
