生物质压块减少了长期青贮过程中的能量损失，并提高了厌氧消化效率：以稻草为例的研究。
Biomass briquetting reduces the energy loss during long-term ensiling and enhances anaerobic digestion: A case study on rice straw.
机构信息
College of Engineering, Huazhong Agricultural University, 430070 Wuhan, China; Key Laboratory of Development and Application of Rural Renewable Energy, Ministry of Agriculture, 610041 Chengdu, China; The Cooperative Innovation Center for Sustainable Pig Production, 430070 Wuhan, China.
College of Engineering, Huazhong Agricultural University, 430070 Wuhan, China.
出版信息
Bioresour Technol. 2019 Nov;292:121912. doi: 10.1016/j.biortech.2019.121912. Epub 2019 Jul 27.
The present study evaluated the impact of briquetting prior to ensiling on rice straw characteristics and anaerobic digestion performance. Ensiling for 10 months significantly reduced cellulose, hemicellulose and lignin of the uncompressed straw by 50.3%, 61.6% and 34.6%, respectively. However, increase of briquetting ratio enhanced the cellulose and hemicellulose contents at different ensiling times. In addition, increasing of ensiling time significantly reduced the biogas yield, while the highest cumulative biogas yield of 313.8 L kg VS was obtained from rice straw ensiled for 7 days at 1:6 briquetting ratio. Interestingly, the maximum biogas productivity of 1:6 briquetted straw after 10 months ensiling was 17.7% higher than that of the uncompressed straw ensiled for 7 days. Thus, briquetting prior to ensiling is a favorable approach to reduce the mass loss for enhanced biogas yield and energy recovery.
本研究评估了青贮前压块对稻草特性和厌氧消化性能的影响。青贮 10 个月后，未压缩稻草的纤维素、半纤维素和木质素分别显著减少了 50.3%、61.6%和 34.6%。然而，压块比的增加在不同的青贮时间内提高了纤维素和半纤维素的含量。此外，随着青贮时间的延长，沼气产量显著降低，而在 1:6 的压块比下青贮 7 天的稻草获得了最高的累计沼气产量 313.8 L/kgVS。有趣的是，在青贮 10 个月后，1:6 压块稻草的最大沼气产率比青贮 7 天的未压缩稻草高 17.7%。因此，青贮前压块是一种减少质量损失、提高沼气产量和能量回收的有利方法。
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