Enhancing biomethane production by biochar addition during anaerobic digestion is economically unprofitable

被引：13
作者：
Gonzalez-Arias, Judith [1 ]
Judith Martinez, Elia [1 ]
Gomez, Xiomar [1 ]
Sanchez, Marta E. [1 ]
Cara-Jimenez, Jorge [1 ]
机构：
[1] Univ Leon, Nat Resources Inst IRENA, Chem & Environm Bioproc Engn Grp, Leon 24071, Spain
来源：
ENVIRONMENTAL CHEMISTRY LETTERS | 2022年 / 20卷 / 02期
关键词：
Biomethane production; Biogas upgrading; Green energy; Biochar; Waste valorization; Anaerobic digestion; PROFITABILITY ANALYSIS; BIOGAS;
D O I：
10.1007/s10311-021-01368-8
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The societal demand for biomethane production by anaerobic digestion of waste and biomass is rapidly growing to build a circular economy, yet actual efficiency is limited. Biochar addition has been technically shown to enhance methane yields in general, but economics are unknown so far. Here, we evaluated the profitability of adding biochar into orange peel waste using the method of the discounted cash flow. We also studied biochar prices and incentives for biomethane production. Results indicate that adding biochar decreases 17 times the overall economy of the process. This decline is explained by high current prices of biochar. To reach profitability, subsidies should be higher than 20 Eur per MWh of biomethane.
引用
收藏
页码：991 / 997
页数：7
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