(560ac) Characterization of Physical and Chemical Properties of Bio-Crude Oil from Hydrothermal Liquefaction of Food Waste

Authors: 
Jena, U., New Mexico State University
Bayat, H., New Mexico State University
Dehghanizadeh, M., New Mexico State University
Cheng, F., New Mexico State University
Brewer, C. E., New Mexico State University
Sustainable management of food waste is one of the most urgent challenges facing the society with 1.3-billion-ton food waste being generated annually in the worldwide. The traditional managements (e.g. landfilling) raise economic and environmental concerns including low processing efficiency, greenhouse gas emission, and water/soil pollution. Considering the abilities of recycling value-added products, stabilizing organic matter, and reducing waste volume, hydrothermal liquefaction (HTL) is deemed as a an alternative remediation technique, which can convert moisture-rich food waste into bio-crude oil, that can be further upgraded into liquid fuels. In this study, two types of food wastes (pre-consumption and post-consumption) were collected from a New Mexico State University- campus dining facility. HTL of organic fractions of the above food wastes were conducted using a 100 mL batch reactor at 200-290°C, 30 min reaction time and ~15% solids load. The highest bio-crude oil yield (28.26 wt.%, dry basis) was obtained at a temperature of 240 °C and overall product distribution was investigated. Feedstock and the product bio-crude oil, aqueous phase and char were characterized by various analytical methods. Detailed characterization of bio-crude oil was performed by fatty acid methyl ester (FAME) analysis, gas chromatography-mass spectroscopy (GC-MS), high-resolution Fourier transform-mass spectroscopy (FT-MS), Fourier transform infrared spectroscopy (FT-IR), and thermogravimetric analysis (TGA) in order to comprehensively evaluate bio-crude oil make up and chemistry.