Valorization of crude glycerol based on biological processes for accumulation of lipophilic compounds

• Type: Article in International Scientific Journal
• Date: 2019

Authors

Assis, DD (Author) Other; Santos, J (Author) Other; de Jesus, CS (Author) Other; de Souza, CO (Author) Other; Costa, SS (Author) Other; Miranda, AL (Author) Other; da Silva, JR (Author) Other; Beatriz B P P Oliveira (Author) FFUP; Druzian, JI (Author) Other

Journal

Title: International Journal of Biological Macromolecules

Vol. 129

Pages: 728-736

ISSN: 0141-8130

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 3 Citations

Other information

Authenticus ID: P-00Q-MZM

DOI: 10.1016/j.ijbiomac.2019.02.077

Abstract (EN): Bacteria that are capable of accumulating lipids in their cells as storage compounds can also produce polyhydroxyalkanoates of high technological value, depending on the specific culture conditions. The objective of this study was to utilize crude glycerol from biodiesel (CGB) as a substrate, which is a major byproduct from biodiesel production, to produce lipophilic compounds. Bacillus megaterium INCQS 425 was cultivated and evaluated for the production of lipophilic compounds and the properties of these compounds were investigated. Cultivation of the bacteria in a medium with a C:N ratio of 0.60:1 favored the accumulation of lipids by (17.5%) comprising mainly palmitic acid (13.08%), palmitoleic (39.48%), and especially oleic add (37.02%), which imparts good characteristics to biodiesel. Meanwhile, cultivation of the bacteria in a medium with a C:N ratio of 4:1 favored the accumulation of polyhydroxyalkanoates (PHA) (3.31 g L-1) mainly comprising medium and long chain PHA. Low crystallinity (<30%) and excellent thermal properties make them suitable for processes that demand high temperatures, such as extrusion. The lipids produced in the present study had satisfactory oxidative stability for the production of quality biodiesel. The polyhydroxyalkanoates produced in the study are of low cost and have promising thermal properties that justify its technological potential, thereby configuring highly competitive bioproducts. (C) 2019 Elsevier B.V. All tights reserved.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9