BIODIESEL PRODUCTION FROM BLACK SOLDIER FLY (HERMETIA ILLUCENS) LARVAE VIA IN SITU INTERESTERIFICATION IN A STIRRED TANK REACTOR SYSTEM WITH BIOCATALYST FROM RHIZOPUS ORYZAE
As a solution to energy and environmental problems, biodiesel can be produced using biomass from black soldier fly larvae (BSFL) as a source of animal oil, thus avoiding conflict with the food sector. However, in biodiesel production, the use of chemical or acid catalysts can cause problems, such...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/83004 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | As a solution to energy and environmental problems, biodiesel can be produced
using biomass from black soldier fly larvae (BSFL) as a source of animal oil, thus
avoiding conflict with the food sector. However, in biodiesel production, the use of
chemical or acid catalysts can cause problems, such as the formation of soap in the
transesterification process, damage to equipment due to corrosion, the production of
large amounts of waste water, and difficulties in the separation of catalysts dissolved
in biodiesel. Therefore, the use of lipase enzyme from Rhizopus oryzae biocatalyst
with loofah matrix can avoid negative impacts on the environment because it can be
used repeatedly and does not cause difficult separation with the biodiesel produced.
This study aims to synthesize and determine the enzymatic activity of Rhizopus
oryzae wild-type biocatalyst and compare with commercial lipase, design a stirred
tank reactor for biodiesel production, determine the effect of reaction time on the
yield of biodiesel produced in-situ from BSFL with methyl acetate solvent at
variations of reaction time of 4, 8, 12, 16, 20, 24, and 28 hours, and determine the
composition of biodiesel, and quality parameters of biodiesel produced from
optimum conditions in stirred tank reactor (STR) system. The enzymatic activity of
the synthesized Rhizopus oryzae whole-cell biocatalyst resulted in a value of
4014.945 U/g which was higher than that of commercial lipase enzymes. The
biodiesel yield value as a function of reaction time from the in-situ extraction and
interesterification process using methyl acetate solvent produces an increasing yield
profile up to 20 hours reaction time and tends to stagnate at 24 to 28 hours reaction
time with the highest biodiesel yield of 94,59% obtained when the reaction time is 20
hours, the stirring speed is 180 rpm, and the reaction temperature is 37?. The
composition of biodiesel includes FG (free glycerol), MAG (monoglycerides), DAG
(diglycerides), TAG (triglycerides), and esters obtained respectively by : 0,023%;
0,102%; 5,218%; 0,071%; and 94,586%. Then, the quality of biodiesel in the
optimum reaction conditions, in the form of water content, density, kinematic
viscosity, and HHV values have values of: 0,037%; 882,622 kg/m3; 3,539 mm2/s;
and 40,689 MJ/kg. In this study, it was found that the synthesis of lipase enzyme
from Rhizopus oryzae wild-type biocatalyst using loofah matrix showed good results
through higher enzymatic activity values than commercial lipase and biodiesel
quality that met SNI 7182: 2015 and EN 14214 standards |
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