Staphylococcus xylosus fermentation of pork fatty waste: raw material for biodiesel production.
The need for cleaner sources of energy has stirred research into utilising alternate fuel sources with favourable emission and sustainability such as biodiesel. However, there are technical constraints that hinder the widespread use of some of the low cost raw materials such as pork fatty wastes. Currently available technology permits the use of lipolytic microorganisms to sustainably produce energy from fat sources; and several microorganisms and their metabolites are being investigated as potential energy sources. Thus, the aim of this study was to characterise the process of Staphylococcus xylosus mediated fermentation of pork fatty waste. We also wanted to explore the possibility of fermentation effecting a modification in the lipid carbon chain to reduce its melting point and thereby act directly on one of the main technical barriers to obtaining biodiesel from this abundant source of lipids. Pork fatty waste was obtained from slaughterhouses in southern Brazil during evisceration of the carcasses and the kidney casing of slaughtered animals was used as feedstock. Fermentation was performed in BHI broth with different concentrations of fatty waste and for different time periods which enabled evaluation of the effect of fermentation time on the melting point of swine fat. The lowest melting point was observed around 46°C, indicating that these chemical and biological reactions can occur under milder conditions, and that such pre-treatment may further facilitate production of biodiesel from fatty animal waste.
Laboratory of Wastes, Federal University of Pelotas, Pelotas, RS, Brazil. Electronic address: rogermarquesea@gmail.com.
Roger Vasques
RV
Marques
Laboratory of Wastes, Federal University of Pelotas, Pelotas, RS, Brazil.
Matheus Francisco da
MF
Paz
Animal Products Inspection Laboratory, Federal University of Pelotas, Campus Capão do Leão, Capão do Leão, RS, Brazil.
Eduarda Hallal
EH
Duval
Laboratory of Wastes, Federal University of Pelotas, Pelotas, RS, Brazil.
Luciara Bilhalva
LB
Corrêa
Laboratory of Wastes, Federal University of Pelotas, Pelotas, RS, Brazil.
Érico Kunde
ÉK
Corrêa
D000818:Animals; D056804:Biofuels; D001711:Biotransformation; D005285:Fermentation; D019649:Food Industry; D007220:Industrial Waste; D000069466:Red Meat; D013210:Staphylococcus / Q000378:metabolism*
D056804:Biofuels; D007220:Industrial Waste
Microorganism; Slaughterhouse waste; Staphylococcus xylosus; Sustainability; Waste recovery