Swetha Authilingam, ShriVigneshwar Sivakumar, Gopinath Kannappan Panchamoorthy, Sivaramakrishnan Ramachandran, Shanmuganathan Rajasree, Arun Jayaseelan
Department of Chemical Engineering, Sri Sivasubramaniya Nadar College of Engineering, Kalavakkam, 603110, Tamil Nadu, India.
Laboratory of Cyanobacterial Biotechnology, Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand.
Chemosphere. 2021 Nov;283:131248. doi: 10.1016/j.chemosphere.2021.131248. Epub 2021 Jun 21.
Hydrothermal liquefaction (HTL) of biomass results in the formation of bio-oil, aqueous phase (HTL-AP), bio-char, and gaseous products. Safer disposal of HTL-AP is difficult on an industrial scale since it comprises low molecular acid compounds. This review provides a comprehensive note on the recent articles published on the effective usage of HTL-AP for the recovery of valuable compounds. Thermo-chemical and biological processes are the preferred techniques for the recovery of biofuel, platform chemicals from HTL-AP. From this review, it was evident that the composition of HTL-AP and product recovery are the integrated pathways, which depend on each other. Substitute as reaction medium in HTL process, growth medium for algae and microbes are the most common mode of reuse and recycle of HTL-AP. Future research is needed to depict the mechanism of HTL process when HTL-AP is used as a reaction medium on an industrial scale. Need to find a solution for the hindrance in commercializing HTL process and recovery of value-added compounds from HTL-AP from lab scale to industry level. Integrated pathways on reuse and HTL-AP recycle helps in reduced environmental concerns and sustainable production of bio-products.
生物质的水热液化（HTL）会产生生物油、水相（HTL-AP）、生物炭和气态产物。由于HTL-AP包含低分子酸性化合物，因此在工业规模上对其进行安全处置很困难。本综述全面介绍了最近发表的关于有效利用HTL-AP回收有价值化合物的文章。热化学和生物过程是从HTL-AP中回收生物燃料、平台化学品的首选技术。从这篇综述中可以明显看出，HTL-AP的组成和产物回收是相互依赖的综合途径。替代HTL过程中的反应介质、作为藻类和微生物的生长介质是HTL-AP最常见的再利用和循环利用方式。未来需要开展研究，以描述在工业规模上使用HTL-AP作为反应介质时HTL过程的机制。需要找到解决HTL过程商业化障碍以及将从实验室规模到工业规模从HTL-AP中回收增值化合物的问题的解决方案。HTL-AP再利用和循环利用的综合途径有助于减少环境问题并实现生物产品的可持续生产。
