Variability in structural carbohydrates, lipid composition, and cellulosic sugar production from industrial hemp varieties

Mothi Bharath Viswanathan, Kiyoul Park, Ming Hsun Cheng, Edgar B. Cahoon, Ismail Dweikat, Tom Clemente, Vijay Singh

Research output: Contribution to journalArticlepeer-review

Abstract

The aim of this study was to determine carbohydrate recovery from hemp for ethanol production and quantify biodiesel from TAG (Triacylglycerol) present in hemp. The structural composition of five different hemp varieties (Seward County-SC, York County-YC, Loup County-LC, 19 m96136-19 m, and CBD Hemp-CBD) were analyzed. Concentration of glucan and xylan ranged between 32.63 to 44.52% and 10.62 to 15.48% respectively. The biomass was then pretreated with Liquid hot water followed by disk milling and then hydrolyzed enzymatically to yield monomeric sugars. High glucose (63-85%) and xylose (73-88%) recovery was achieved. Lipids were extracted from hemp using hexane and isopropanol and then transesterified to produce biodiesel. Approximately, 50% of total fatty acids in SC, LC, and CBD hemp were linoleic acid. Palmitic acid was present between 32 to 50% in varieties YC and 19 m. Highest TAG concentration at 25% of total lipids was observed in CBD hemp. The analysis on lipid composition and high sugar recovery demonstrates hemp as a potential bioenergy crop for ethanol and biodiesel coproduction.

Original languageEnglish (US)
Article number112906
JournalIndustrial Crops and Products
Volume157
DOIs
StatePublished - Dec 1 2020

Keywords

  • Disk milling
  • FAME (Fatty acid methyl esters)
  • Hemp
  • Liquid hot water pretreatment
  • TAG (Triacylglycerol)

ASJC Scopus subject areas

  • Agronomy and Crop Science

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