Characterization of the Fatty Acids Present in Wastewaters from Production of Biodiesel Tilapia

Abstract

Biodiesel obtained from oil extracted from the viscera of tilapia is a viable alternative in the replacement of petroleum fuels. However, during the purification step is performed biodiesel washing water is performed, which generates high effluent pollutant loads due to the reagents used and the very composition of the raw material. This study aims to characterize the fatty acids present in water from washing of the process of purifying biodiesel tilapia (Oreochromis niloticus). Fatty acid compositions were determined using gas chromatography (GC-FID). The results showed that the fatty acids present in greater quantities in the effluent were lauric (C12: 0), followed by myristic (C14: 0), palmitic (C16: 0), oleic (C18: 1), stearic (C18: 0), linolenic (C18: 3), and linoleic (C18: 2) acids. Therefore, the levels of oil and grease found in the rinse water from washing of the oil biodiesel tilapia are far above the allowed values above; thus they do not comply with Brazilian federal regulations.

Physical and Chemical Properties of Biodiesel Obtained from Amazon Sailfin Catfish (Pterygoplichthys pardalis) Biomass Oil

“…Additionally, investigations have been developed to identify the characteristics and technical viability of biodiesel produced from fish species of high consumption or fast growth in farms [20][21][22][23][24][25][26]. García-Moreno et al [20] studied the properties of biodiesel produced from a waste fish oil mainly composed of salmon (90%).…”

“…In addition, high amounts of saturated fatty acids were detected, increasing the number of cetane in biodiesel, which reduces the delay in the ignition and improves the combustion process. e technoecological feasibility of the use of tilapia for industrial biodiesel production was addressed by Braga et al [26]. eir research determined that although tilapia is a viable alternative to replace oil sources, the levels of oil and grease found in rinse water from tilapia biodiesel oil wash far exceed the limits established by environmental legislation such as Brazilian.…”

Lipase in biodiesel production

“…The cost and availability of a feedstock are important factors in the choice of raw materials. The cost of feedstock is directly proportional to the overall cost of biodiesel (Braga et al, 2015). All oil feedstocks can be used for enzyme catalyzed transesterification and the composition of feedstock differs based on the oil source and level of refining.…”

“…Several polar compounds such as methanol, ethanol, propanol, isopropanol, 2-propanol, n-butanol and isobutanol have been considered to be acceptable acyl/ alkanoyl (RCO) group acceptors in transesterification (Braga et al, 2015). Ethanol has been known to be a good alternative polar solvent in enzymatic biodiesel production since it is less toxic than methanol.…”

Evaluation of Fatty Acid Waste in the Synthesis of Oligo(Ether-Ester)s

“…Biermann et al stated that more than 90% oleochemical reactions occur due to a fatty acid carboxyl group [1]. Previously, numerous reports on the enzymatic and chemical conversion of acid oil to fatty acid methyl esters (FAMEs) were published and several researchers studied the esterification of FFAs in waste cooking oil in order to obtain low-cost biodiesel [4][5][6][7]. Kojima et al reutilized the waste-activated bleaching earth to produce FAME with the use of a microbial catalyst and waste materials [8].…”