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A Study on Optimization of Pretreatment for Lipid Extraction from Rice Husk Using Oleaginous Yeast

  • N. Dhivya PriyaEmail author
  • S. Sivasakthi
  • R. Loganath
  • R. Balaji
  • K. Yaazhmozhi
  • J. Senophiyah-Mary
  • S. Murugan
Conference paper

Abstract

Biodiesel defined as a monoalkyl ester of vegetable or animal fat is produced by the transesterification of free fatty acids with a monohydric alcohol, usually methanol, employing acid catalyst, alkali catalyst, or enzyme catalyst. These are an environmentally attractive alternative to conventional fossil fuels. Also, biodiesel has many important technical advantages over conventional petrodiesel such as inherent lubricity, low toxicity, derivation from a renewable and domestic feedstock, superior flash point and biodegradability, negligible sulfur content, and lower exhaust emissions. More than 10 million tons of biodiesel are produced around the world; yet, the production rate is still low below expectations. For the future renewable fuel projections to be met, additional sources of feedstock are to be explored. The potential of rice husk as a possible feedstock for lipid production has been analyzed in this paper. Waste rice husks were collected from rice mills in and around Coimbatore, Tamil Nadu. Powdered sample finer than 75 µm was further ground in a ball mill, for the varying time period and the optimum time required for maximum yield was found. Acid and alkali pretreatment to hydrolyze the sample cells were carried out with varying concentrations of con. H2SO4 and NaOH, respectively, and the optimum condition for maximum yield were found. Rice husk hydrolysate was then inoculated with Lipomyces starkeyi, Yarrowia lipolytica, and Metschinokawia pulcherima and the species for maximum yield were found.

Keywords

Biodiesel Rice husk Pretreatment Total organic carbon Concentration of acid 

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Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • N. Dhivya Priya
    • 1
    Email author
  • S. Sivasakthi
    • 1
  • R. Loganath
    • 2
  • R. Balaji
    • 1
  • K. Yaazhmozhi
    • 1
  • J. Senophiyah-Mary
    • 1
  • S. Murugan
    • 1
  1. 1.Department of Environmental EngineeringGovernment College of TechnologyCoimbatoreIndia
  2. 2.Department of Civil EngineeringIndian Institute of Engineering Science and TechnologyShibpurIndia

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