2.3. Biooil
Biooil is a liquid fuel with dark brown color. Biooil has the
potential to substitute conventional petroleum fuels. Currently,
several research groups are engaged in developing technologies
for the production of biooils. Biooils can be prepared from biomass
viz. stich grass, agricultural residues, municipal biowastes and
forestry wastes. Pyrolysis is used as a method for the production of
biooil. Production of biooil by flash pyrolysis is currently investigated
in industrial scale. There are many limitations of biooils viz.
(i) poor thermal stability, (ii) poor fuel proterties and (iii) corrosive
nature. Unlike biodiesel and bioethanol; so far, biooils are not
available commercially in fuel stations. There are few initial
reports on the production of biooils from food wastes [35]. For
instance, Ahmed and Gupta reported the pyrolysis and gasification
of food waste [36]. Balasubramanian et al. reported enzymatic
hydrolysis of food waste prior to hydrothermal treatment to produce
hydrochars and biooil. Pre-treatment of food waste was