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) 导致生物油、水相 (HTL-AP)、生物炭和气态产物的形成。HTL-AP 的安全处置在工业规模上是困难的，因为它包含低分子酸化合物。本综述对近期发表的关于有效使用 HTL-AP 回收有价值化合物的文章进行了全面说明。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。从这篇综述中可以看出，HTL-AP 的组成和产物回收率是相互依赖的综合途径。藻类和微生物的生长培养基作为 HTL 过程中反应介质的替代，是 HTL-AP 最常见的再利用和再循环方式。当 HTL-AP 用作工业规模的反应介质时，需要进一步研究来描述 HTL 过程的机制。需要找到解决 HTL 工艺商业化和从 HTL-AP 回收增值化合物从实验室规模到工业水平的障碍的解决方案。再利用和 HTL-AP 回收的综合途径有助于减少环境问题和生物产品的可持续生产。