Potential of Macroalgae Ulva lactuca as a Source Feedstock for Biodiesel Production

Author(s): Hanaa H. Abd El Baky*, Gamal S. El Baroty

Journal Name: Recent Patents on Food, Nutrition & Agriculture

Volume 8 , Issue 3 , 2016

Become EABM
Become Reviewer
Call for Editor

Graphical Abstract:


Background: The aim of this study was to investigate the possibility of growing of algae Ulva lactuca L under different salinity levels coupled with varied KNO3 concentrations (source of N) as a potential source of oil for biodiesel production.

Methods: U. lactuta was cultured in 10.0% NaCl coupled with either 2.5 g/L (S1+ 1N) or 1.0 g/L KNO3 (S1+ 2N) and in 30.0% NaCl coupled with 2.5 g/L (S2+ 1N) or 1.0 g/L KNO3 (S2+ 2N) nutrient medium. Among all algae cultures, biomass (dry weight) and lipid accumulation (total lipid content, TL) were significantly different (P>0.5%), with various degrees. The TL was increased (8.21% to 15.95%, g/100g) by increasing the NaCl % (from 10% to 30%) coupled with the depletion of KNO3 level (from 2.5% to 1%) in culture medium. High lipid content (15.95%) was obtained in S2+ 2N culture, this lipid showed physical (density, viscosity and average molecular weight) and chemical (iodine, acid, saponification and peroxide values) properties suitable for biodiesel production.

Results: The fatty acid methyl esters (FAME, biodiesel) prepared by trans-esterifiction reaction under acidic condition were mainly composed of saturated (50.33%), monounsaturated (MUFA, 36.12%) and polyunsaturated (13.55%) esters. C-18:1 was found to be the main MUFA, representing 25.76% of total FAME. On the other hand, the values of some critical of physiochemical parameter (density, kinematic viscosity, iodine value, acid value and oxidation stability) of biodiesel were found to meet the standards for a high quality biodiesel.

Conclusion: Hence, U. lactuta could be serving as a valuable renewable biomass of oil for biodiesel production. There are recent patents also suggesting use of oil of U. lactuta marine biomass for biodiesel production.

Keywords: Macroalgae, Ulva lactuca L, salt stress, biodiese, jatropha seed, lipids.

Rights & PermissionsPrintExport Cite as

Article Details

Year: 2016
Published on: 15 September, 2017
Page: [199 - 204]
Pages: 6
DOI: 10.2174/2212798409666170602080725
Price: $65

Article Metrics

PDF: 23
PRC: 1