Low-temperature torrefaction assisted with solid-state KOH/urea pretreatment for accelerated methane production in wheat straw anaerobic digestion.

Autor: Shao Z; College of Mechanical and Electronic Engineering, Northwest A&F University, 22 Xinong Road, Yangling, Shaanxi 712100, China; Northwest Research Center of Rural Renewable Energy Exploitation and Utilization of M.O.A, Northwest A&F University, 22 Xinong Road, Yangling, Shaanxi 712100, China., Gnanasekar P; Department of Chemical and Biomedical Engineering, National High Magnetic Field Laboratory, FAMU-FSU College of Engineering, 2525 Pottsdamer Street, Tallahassee, FL 32310, USA., Tratnik N; Graduate Department of Forestry, University of Toronto, 33 Willcocks Street, M5S 3B3, Canada., Tanguy NR; Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior s/n, Ciudad Universitaria, Coyoacán, CDMX 04510, México., Guo X; College of Mechanical and Electronic Engineering, Northwest A&F University, 22 Xinong Road, Yangling, Shaanxi 712100, China; Northwest Research Center of Rural Renewable Energy Exploitation and Utilization of M.O.A, Northwest A&F University, 22 Xinong Road, Yangling, Shaanxi 712100, China., Zhu M; College of Mechanical and Electronic Engineering, Northwest A&F University, 22 Xinong Road, Yangling, Shaanxi 712100, China; Northwest Research Center of Rural Renewable Energy Exploitation and Utilization of M.O.A, Northwest A&F University, 22 Xinong Road, Yangling, Shaanxi 712100, China., Qiu L; College of Mechanical and Electronic Engineering, Northwest A&F University, 22 Xinong Road, Yangling, Shaanxi 712100, China; Northwest Research Center of Rural Renewable Energy Exploitation and Utilization of M.O.A, Northwest A&F University, 22 Xinong Road, Yangling, Shaanxi 712100, China., Yan N; Graduate Department of Forestry, University of Toronto, 33 Willcocks Street, M5S 3B3, Canada; Chemical Engineering and Applied Chemistry, University of Toronto, 200 College Street, M5S 3E5, Canada., Chen H; College of Mechanical and Electronic Engineering, Northwest A&F University, 22 Xinong Road, Yangling, Shaanxi 712100, China; Northwest Research Center of Rural Renewable Energy Exploitation and Utilization of M.O.A, Northwest A&F University, 22 Xinong Road, Yangling, Shaanxi 712100, China. Electronic address: chenheyu@nwafu.edu.cn.
Jazyk: angličtina
Zdroj: Bioresource technology [Bioresour Technol] 2023 Jun; Vol. 377, pp. 128940. Date of Electronic Publication: 2023 Mar 21.
DOI: 10.1016/j.biortech.2023.128940
Abstrakt: Low-temperature torrefaction assisted with solid-state KOH/urea applied onto wheat straw was proposed to break down the lignocellulosic material to enhance biomethane production in anaerobic digestion (AD). The optimization of key parameters applying the Box-Behnken design and response surface methodology showed that an addition of 0.1 g/g straw KOH/urea at 180 °C while torrefying for 30 min was the optimal condition for producing biomethane. Results indicate that co-applying KOH and urea in torrefaction synergistically enhanced the biodegradability of straw by effectively removing lignin and largely retaining cellulose, giving rise to a 41 % increase in the cumulative methane production compared to untreated straw (213 mL/g-volatile solids (VS raw )) from batch AD. Additionally, the nitrogen- and potassium-rich digestates helped to improve soil fertility, thus achieving a zero-waste discharge. This study demonstrated the feasibility of using solid-state KOH/urea assisted low-temperature torrefaction as an effective pretreatment method to promote methane production during AD.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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