Research and development on hydrothermal liquefaction (HTL) of wet microbial biomass have been on a dramatic rise. Although microalgae have been the main feedstocks, investigations of HTL of yeast species were few, not to mention yeast biomass cultivated on cellulosic hydrolysates. In this study, six catalysts were tested regarding their effects on yields of biocrude and biochar from partially defatted Cryptococcus curvatus. Among the six, K₂CO₃ at 350 and 300 °C and KOH at 350 °C led to the highest yield of biocrude, 68.9%, 63.9% and 67.0%, respectively. These biocrudes had low content of sulfur and nitrogen but high HHVs in the range of 36.9 and 39.0 MJ/kg. The biocrudes from the top three running conditions were dominated by fatty acids and fatty acid esters based on GC/MS identification. The corresponding aqueous phase samples contained high concentrations of fatty acids among all that were identifiable. The successful HTL of the partially defatted yeast cell residues promises a platform where lignocellulosic sugars can be converted to biodiesel from yeast cell lipids and biocrude from the remaining yeast cells.

湿微生物生物质的水热液化（HTL）的研究和开发正在急剧增加。尽管微藻已成为主要原料，但对酵母种类的HTL的研究很少，更不用说在纤维素水解产物上培养的酵母生物量了。在这项研究中，测试了六种催化剂对部分脱脂隐球菌的生物粗品和生物炭收率的影响。在六个之中，K ₂ CO ₃在350和300°C的温度下，以及在350°C的KOH的情况下，生物粗品的最高产量分别为68.9％，63.9％和67.0％。这些生物原油的硫和氮含量低，但高HV在36.9至39.0 MJ / kg的范围内。根据GC / MS鉴定，前三种运行条件下的生物原油以脂肪酸和脂肪酸酯为主。在所有可识别的样品中，相应的水相样品均包含高浓度的脂肪酸。部分脱脂酵母细胞残渣的成功HTL有望成为一个平台，在此平台上，木质纤维素糖可以从酵母细胞脂质转化为生物柴油，并从剩余的酵母细胞生物降解。