Production of lipases by solid state fermentation using vegetable oil-refining wastes

Angélica Santis-Navarro, Teresa Gea, Raquel Barrena, Antoni Sánchez

Research output: Contribution to journalArticleResearchpeer-review

29 Citations (Scopus)

Abstract

Lipases were produced by a microbial consortium derived from a mixture of wastewater sludges in a medium containing solid industrial wastes rich in fats, under thermophilic conditions (temperature higher than 45 °C for 20 days) in 4.5-L reactors. The lipases were extracted from the solid medium using 100. mM Tris-HCl, pH 8.0 and a cationic surfactant agent (cetyltrimethylammonium chloride). Different doses of surfactant and buffer were tested according to a full factorial experimental design. The extracted lipases were most active at 61-65 °C and at pH 7.7-9. For the solid samples, the lipolytic activity reached up to 120,000. UA/g of dry matter. These values are considerably higher than those previously reported in literature for solid-state fermentation and highlight the possibility to work with the solid wastes as effective biocatalysts. © 2011 Elsevier Ltd.
Original languageEnglish
Pages (from-to)10080-10084
JournalBioresource Technology
Volume102
DOIs
Publication statusPublished - 1 Nov 2011

Keywords

  • Lipase
  • Organic wastes
  • Sewage sludge
  • Solid-state fermentation
  • Thermostability

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