Immobilization of Rhizopus oryzae ly6 onto loofah sponge as a whole-cell biocatalyst for biodiesel production

Qiyang He, Hao Shi, Huaxiang Gu, Gilda Naka, Huaihai Ding, Xun Li, Yu Zhang, Bo Hu, Fei Wang

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Whole cell biocatalysts for biodiesel production have garnered significant attention in recent years, as they can help avoid the complex procedures of isolation, purification, and immobilization of extracellular lipase. Because of its renewability and biodegradability, loofah (Luffa cylindrica) sponge is an advantageous substitute for traditional biomass carriers in whole cell immobilization. Rhizopus oryzae mycelia can spontaneously attach onto loofah sponge particles (LSPs) during cell cultivation. The highest immobilized R. oryzae cells concentration can reach up to 1.40 g/1 g of LSPs. The effects of biocatalyst addition and water content on methanolysis for biodiesel production were investigated in this paper. The operational stability of glutaraldehyde-treated biocatalyst at 35 ° C, using a 1:1 oil-to-methanol ratio, was assayed, revealing a 3.4-fold increase in half-life compared with the untreated biocatalyst. Under optimized conditions, the yield of methyl esters in the reaction mixture reached 82.2% to 92.2% in each cycle. These results suggested that loofah sponge is a potential fungi carrier for an immobilized whole-cell biocatalyst.

Original languageEnglish (US)
Pages (from-to)850-860
Number of pages11
JournalBioResources
Volume11
Issue number1
DOIs
StatePublished - 2016

Keywords

  • Biodiesel
  • Loofah sponge
  • Methanolysis
  • Rhizopus oryzae
  • Whole cell biocatalyst

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