Ministry of Education Key Laboratory of Polluted Environment Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou Zhejiang 310029, China.
Waste Manag. 2011 Mar;31(3):438-44. doi: 10.1016/j.wasman.2010.10.014. Epub 2010 Nov 10.
Response surface methodology was employed to analyze the interaction between the water:feed ratio (2.0-9.0), reaction temperature (180-280°C) and retention time (0-60 min) on hydrothermal conversion of lawn grass clippings as a model biomass. Solid residues and the liquid pH decreased, while the water-soluble organic fraction increased with greater water:feed ratios. Greater water content resulted in a higher yield of reducing sugars, proteins, and amino acids. This was attributed to improved mass transport properties in the subcritically-heated water. Response surface analysis was used to describe the interaction of the water:feed ratio, temperature and retention time with regards to the yields of reducing sugars, proteins, and amino acids. The highest yields of both reducing sugars and amino acids were obtained with a water:feed ratio of 5.5 at 230°C reaction temperature and 30 min retention time; highest yield of protein was obtained with a water:feed ratio of 9.0 at 230°C and 0 min retention time. Moreover, fitted quadratic polynomial, fitted 2FI polynomial and quadratic polynomial were established via ANOVA to describe the effects of temperature, retention time and water:feed ratio on the yield of reducing sugars, proteins, and amino acids.
饲料比（2.0-9.0）、反应温度（180-280°C）和停留时间（0-60 分钟）对草坪草屑水热转化为模型生物质的相互作用。固形物残渣和液体 pH 值降低，而水溶性有机部分随水：饲料比的增加而增加。更多的水含量导致还原糖、蛋白质和氨基酸的产率更高。这归因于在亚临界加热水中改善了传质性能。响应面分析用于描述水：饲料比、温度和停留时间与还原糖、蛋白质和氨基酸产率之间的相互作用。在 230°C 的反应温度和 30 分钟的停留时间下，水：饲料比为 5.5 时可获得最高的还原糖和氨基酸产率；在 230°C 和 0 分钟的停留时间下，水：饲料比为 9.0 时可获得最高的蛋白质产率。此外，通过方差分析建立了二次多项式、拟合 2FI 多项式和二次多项式，以描述温度、停留时间和水：饲料比对还原糖、蛋白质和氨基酸产率的影响。
