Faculty of Science and Engineering, University of Groningen, Nijenborgh 4, 9747 AG Groningen, the Netherlands.
Faculty of Science and Engineering, University of Groningen, Nijenborgh 4, 9747 AG Groningen, the Netherlands.
Sci Total Environ. 2021 Feb 10;755(Pt 1):142940. doi: 10.1016/j.scitotenv.2020.142940. Epub 2020 Oct 14.
Cow manure represents a surplus manure waste in agricultural food sectors, which requires proper disposal. Anaerobic digestion, in this regard, has raised global interest owing to its apparent environmental benefits, including simultaneous waste diminishment and renewable energy generation. However, dedicated intensifications are necessary to promote the degradation of recalcitrant lignocellulosic components of cow manure. Hence, this manuscript presents a review of how to exploit cow manure in anaerobic digestion through different incentives extensively at lab-scale and full-scale. These strategies comprise 1) co-digestion; 2) pretreatment; 3) introduction of additives (trace metals, carbon-based materials, low-cost composites, nanomaterials, and microbial cultures); 4) innovative systems (bio-electrochemical fields and laser irradiation). Results imply that co-digestion and pretreatment approaches gain the predominance on promoting the digestion performance of cow manure. Particularly, for the co-digestion scenario, the selection of lignin-poor co-substrate is highlighted to produce maximum synergy and pronounced removal of lignocellulosic compounds of cow manure. Mechanical, thermal, and biological (composting) pretreatments generate mild improvement at laboratory-scale and are proved applicable in full-scale facilities. It is noteworthy that the introduction of additives (Fe-based nanomaterials, carbon-based materials, and composites) is acquiring more attention and shows promising full-scale application potential. Finally, bio-electrochemical fields stand out in laboratory trials and may serve as future reactor modules in agricultural anaerobic digestion installations treating cow manure.
牛粪代表了农业食品部门的过剩粪便废物，需要妥善处理。在这方面，厌氧消化由于其明显的环境效益而引起了全球的兴趣，包括同时减少废物和产生可再生能源。然而，需要专门的强化措施来促进牛粪中木质纤维素成分的降解。因此，本文综述了如何通过不同的激励措施在实验室规模和全规模上利用牛粪进行厌氧消化。这些策略包括 1）共消化；2）预处理；3）添加物的引入（痕量金属、碳基材料、低成本复合材料、纳米材料和微生物培养物）；4）创新系统（生物电化学领域和激光辐射）。结果表明，共消化和预处理方法在促进牛粪消化性能方面具有优势。特别是在共消化情况下，选择木质素含量低的共底物被强调以产生最大的协同作用，并显著去除牛粪中的木质纤维素化合物。机械、热和生物（堆肥）预处理在实验室规模上产生轻微的改进，并被证明适用于全规模设施。值得注意的是，添加剂（Fe 基纳米材料、碳基材料和复合材料）的引入受到了更多的关注，并显示出有希望在全规模应用中的潜力。最后，生物电化学领域在实验室试验中脱颖而出，可能成为农业厌氧消化装置处理牛粪的未来反应器模块。
