Efficient methane fermentation from the waste of a novel straw alkali-heat pretreatment-butyric acid fermentation process.

IF 2 4区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES Environmental Technology Pub Date : 2025-04-01 Epub Date: 2024-10-16 DOI:10.1080/09593330.2024.2416092

Jianzheng Li, Jiazhi Liu, Zhen Pan, Wenlin Gao, Yupeng Zhang, Jiuling Li, Jia Meng

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Abstract

ABSTRACTThe butyric acid biorefinery technology for straw is highly significant for environmental protection and the restructuring of the energy system. However, this process produces waste from alkali-heat pretreatment (PW) and butyric acid fermentation (FW). In this study, the feasibility of methane fermentation from the wastes was confirmed, with the methane production from PW and FW of 351.1 ± 11.8 and 741.5 ± 14.2 mLCH₄/gVS, respectively. The initial pH and V_FW/V_PW of methane fermentation using the mixed waste of PW and FW were optimized at 7.5 and 1.8, respectively. The methane fermentation using the mixed waste was also verified by operating two anaerobic digesters in sequencing batch mode. At the V_FW/V_PW of 0.25 (actual ratio), methane production was 301.20 mLCH₄/gVS with the waste load of 0.64 kgVS/m³/d. When the V_FW/V_PW was 1.8 (optimal ratio), methane production reached 396.45 mLCH₄/gVS at the waste load of 1.20 kgVS/m³/d. This study facilitates the comprehensive utilization of all components within rice straw.

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利用新型秸秆碱-热预处理-丁酸发酵工艺从废弃物中高效发酵甲烷。

摘要秸秆丁酸生物精炼技术对环境保护和能源系统的结构调整意义重大。然而，该工艺在碱热预处理（PW）和丁酸发酵（FW）过程中会产生废弃物。本研究证实了从废料中发酵甲烷的可行性，PW 和 FW 的甲烷产量分别为 351.1 ± 11.8 mLCH4/gVS 和 741.5 ± 14.2 mLCH4/gVS。使用混合废料 PW 和 FW 进行甲烷发酵的初始 pH 值和 VFW/VPW 值分别优化为 7.5 和 1.8。利用混合废物进行的甲烷发酵也通过两个厌氧消化器的分批顺序运行模式得到了验证。当 VFW/VPW（实际比率）为 0.25 时，甲烷产量为 301.20 mLCH4/gVS，垃圾负荷为 0.64 kgVS/m³/d。当 VFW/VPW 为 1.8（最佳比率）时，当废物负荷为 1.20 kgVS/m3/d 时，甲烷产量达到 396.45 mLCH4/gVS。这项研究有助于综合利用稻草中的所有成分。

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来源期刊

Environmental Technology 环境科学-环境科学

CiteScore

6.50

自引率

3.60%

发文量

审稿时长

4 months

期刊介绍： Environmental Technology is a leading journal for the rapid publication of science and technology papers on a wide range of topics in applied environmental studies, from environmental engineering to environmental biotechnology, the circular economy, municipal and industrial wastewater management, drinking-water treatment, air- and water-pollution control, solid-waste management, industrial hygiene and associated technologies. Environmental Technology is intended to provide rapid publication of new developments in environmental technology. The journal has an international readership with a broad scientific base. Contributions will be accepted from scientists and engineers in industry, government and universities. Accepted manuscripts are generally published within four months. Please note that Environmental Technology does not publish any review papers unless for a specified special issue which is decided by the Editor. Please do submit your review papers to our sister journal Environmental Technology Reviews at http://www.tandfonline.com/toc/tetr20/current