ORIGINAL RESEARCH
Conversion of Vegetable Waste to Lipid Feedstock
for Biodiesel Production Aided with Nano Catalyst
Using RSM Software
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1
Department of Civil Engineering, GCT, Coimbatore, Tamil Nadu, India
2
Government College of Engineering, Bodi, Theni, Tamil Nadu, India
Submission date: 2019-07-07
Final revision date: 2019-11-02
Acceptance date: 2019-11-03
Online publication date: 2020-06-01
Publication date: 2020-08-05
Corresponding author
Murugan Sithan
Civil Engineering, Government College of Technology, Thadagam road, 641013, Coimbatore, India
Pol. J. Environ. Stud. 2020;29(6):4313-4320
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ABSTRACT
Progress in economy leads to increases in society’s energy requirement. Fossil fuel is the major
source of fulfilling energy requirements. Biodiesel is an alternative for liquid fossil fuel. In this study,
biodiesel was produced from lipid obtained from vegetable waste using oleaginous yeast. The pretreated
waste hydrolysate was used for the growth of oleaginous yeast, Lipomyces starkeyi which was
able to yield a biomass concentration of 20 g/L. Obtained biomass was transesterified directly in the
presence of Nanocatalysts calcium hydroxide and Aluminum oxide. The transesterification process
was optimized by RSM software. The optimum ratio of Methanol to lipid was obtained as 6:1and
catalyst concentration of 0.5%. Optimum temperature for biodiesel production was obtained as 60ºC.
Maximum amount of biodiesel obtained as 8g/L which is worked out to be 40 % of the biomass used
in this process. The oxidative stability of the obtained biodiesel was found out to be 1.84 years using
biodiesel rancimat. Hence optimisation of process has yielded highly stable oil from microbial biomass
grown from waste organic solids. The results of this study concluded that biodiesel can be obtained
from biomass containing lipid by direct transesterification.