Ashoor Selim, Khang Tae Uk, Lee Young Hoon, Hyung Ji Sung, Choi Seo Young, Lim Sang Eun, Lee Jinwon, Park Si Jae, Na Jeong-Geol
Department of Agricultural Microbiology, Faculty of Agriculture, Ain Shams University, Hadayek Shoubra, Cairo, 11241, Egypt.
Department of Chemical and Biomolecular Engineering, Sogang University, Seoul, 04107, Republic of Korea.
Bioresour Bioprocess. 2023 May 26;10(1):34. doi: 10.1186/s40643-023-00654-3.
Pyrolysis, a thermal decomposition without oxygen, is a promising technology for transportable liquids from whole fractions of lignocellulosic biomass. However, due to the hydrophilic products of pyrolysis, the liquid oils have undesirable physicochemical characteristics, thus requiring an additional upgrading process. Biological upgrading methods could address the drawbacks of pyrolysis by utilizing various hydrophilic compounds as carbon sources under mild conditions with low carbon footprints. Versatile chemicals, such as lipids, ethanol, and organic acids, could be produced through microbial assimilation of anhydrous sugars, organic acids, aldehydes, and phenolics in the hydrophilic fractions. The presence of various toxic compounds and the complex composition of the aqueous phase are the main challenges. In this review, the potential of bioconversion routes for upgrading the aqueous phase of pyrolysis oil is investigated with critical challenges and perspectives.
热解是一种无氧热分解过程，对于从木质纤维素生物质的全馏分中获得可运输液体而言，是一项很有前景的技术。然而，由于热解产生的亲水性产物，液体油具有不良的物理化学特性，因此需要额外的升级过程。生物升级方法可以通过在低碳足迹的温和条件下利用各种亲水性化合物作为碳源来解决热解的缺点。通过微生物同化亲水性馏分中的无水糖、有机酸、醛和酚类等物质，可以生产出诸如脂质、乙醇和有机酸等多种化学品。各种有毒化合物的存在以及水相成分的复杂性是主要挑战。在本综述中，我们研究了热解油水相升级生物转化途径的潜力，并探讨了关键挑战和前景。
