期刊
JOURNAL OF CLEANER PRODUCTION
卷 238, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jclepro.2019.117813
关键词
Lignin; Alkaline pretreatment; Fermentation; Digestion time; Cost; Benefit
资金
- National Taiwan University [108L7410]
- Korea Institute of Energy Technology Evaluation and Planning (KETEP) [20173010092510]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20173010092510] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Corn stover provides a great potential of bioenergy and biomaterial production through biorefinery, rather than being discarded as solid wastes. Appropriate pretreatments can enhance the biodegradability and digestion efficiency of lignocellulosics, and NaOH pretreatment is considered as an effective method. However, most NaOH pretreatments are usually performed at high temperatures (>100 degrees C) and over a long reaction time (similar to days). In this study, we utilize both CaO-additive and ultrasound technique to improve the cost-effectiveness of NaOH pretreatment of corn stover at relatively low temperatures for a short treatment time. We first evaluate the effect of CaO/ultrasound-assisted NaOH pretreatment on the properties of corn stover, and then determine the performance of subsequent biogas production. We also estimate the costs and benefits of the entire biogas production processes. The results indicated that the developed CaO-and-ultrasound-assisted NaOH pretreatment could effectively improve the lignin conversion to 60% and promote the biogas production through anaerobic digestion to over 500mL per gram of total solids. The benefit-cost ratio of the proposed pretreatment was estimated as 1.39-1.65, suggesting that the combination of ultrasound and CaO addition should result in a higher lignin conversion, and thus enhance the cost-effectiveness of biogas production. (c) 2019 Elsevier Ltd. All rights reserved.
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