Towards Sustainable Production of Biofuels from Microalgae

Patil, V. P.; Tran, Khanh-Quang; Giselrød, Hans Ragnar

doi:10.3390/ijms9071188

Cited by 424 publications

(200 citation statements)

References 35 publications

Supporting

Mentioning

185

Contrasting

Unclassified

Order By: Relevance

“…Renewable and sustainable alternative energy sources such as microalgal biomass show great potential to complement fossil fuels to meet our energy needs in the future. Compared to terrestrial biomass, these microalgae grow faster and they do not compete with food crops for arable lands and fresh water (Patil et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Effect of operating conditions on yield and quality of biocrude during hydrothermal liquefaction of halophytic microalga Tetraselmis sp.

Eboibi

Lewis

Ashman

et al. 2014

Bioresource Technology

125

View full text Add to dashboard Cite

NOTICE: this is the author's version of a work that was accepted for publication in Bioresource Technology resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Bioresource Technology, 2014; 170: 20-29 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractThe biomass of halophytic microalga Tetraselemis sp. with 16%w/w solids was converted into biocrude by a hydrothermal liquefaction (HTL) process in a batch reactor at different temperatures (310, 330, 350 and 370 o C) and reaction times (5, 15, 30, 45 and 60min). The biocrude yield, elemental composition, energy density and severity parameter obtained at various reaction conditions were used to predict the optimum condition for maximum recovery of biocrude with improved quality. This study clearly indicated that the operating condition for obtaining maximum biocrude yield and ideal quality biocrude for refining were different. A maximum biocrude yield of ~65wt% ash free dry weight (AFDW) was obtained at 350 o C and 5min, with a severity parameter and energy density of 5.21 and ~35MJ/kg, respectively. The treatment with 45min reaction time recorded 2 ~62wt% (AFDW) yield of biocrude with and energy density of ~39MJ/kg and higher severity parameter of 7.53.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of operating conditions on yield and quality of biocrude during hydrothermal liquefaction of halophytic microalga Tetraselmis sp.

Eboibi

Lewis

Ashman

et al. 2014

Bioresource Technology

125

View full text Add to dashboard Cite

show abstract

“…Microalgae are organisms with large capacity of fix carbon dioxide and accumulate lipids, so that approximately half of the dry weight of their biomass is carbon, which means that 1 kg of algal biomass fixed 1.6 -1.8 kg CO 2 , and can regularly produce a lipid content from 50% to 60% by weight dry the biomass [2] [3].…”

Section: Introductionmentioning

confidence: 99%

Primary Separation of Antioxidants (Unsaponifiables) the Wet Biomass Microalgae <i>Chlamydomonas</i> sp. and Production of the Biodiesel

Díaz¹,

Cruz²,

Fortes³

et al. 2014

View full text Add to dashboard Cite

This work studies the saponification which directs the wet biomass of algae Chlamydomonas sp. like a previous stage to production of biodiesel. This stage allows the obtainment of fatty acids to produce biodiesel, instead of the gross lipid fraction. In addition of the fatty acids, utilizing the same process one can also obtain the fraction unsaponifiable, these are soluble in apolar solvents and contain mainly carotenoids that can take action as antioxidants and photoprotectors, as they reduce the oxidation of unsaturated fatty acids. The saponification direct and extraction of fatty acids from biomass is faster and reduces the time and cost of operation. The separation of unsaponifiable matter from the biomass humid of microalgae Chlamydomonas sp., was held according to the method AOCS (Ca 6a-40), using extraction Liquid-liquid with hexane as solvent. Subsequently, phase hydroalcoholic or from soap, containing fatty acids, was acidified by addition of H2SO4 and the fatty acids were recovered by the addition of hexane. After acidulation of the soap, necessary for obtaining of the fatty acids was performed the stage of esterification for obtaining of biodiesel. The operating conditions were: molar ratio fatty acid:methanol (1:10), as catalyst 8% H2SO4 calculated in relation to the mass of fatty acid, 200˚C and reaction time of 90 minutes. The content of methyl esters was 96.8% determined by gas chromatography according to standard EN14103. The quality of biodiesel produced from wet biomass of Chlamydomonas sp. is according to the specification established by standard EN 14214 and RANP No. 14. For the identification of the composition the unsaponifiable fraction was used the method of High Performance Liquid G. C. Díaz et al. 1211 Chromatography (HPLC). The composition of the material unsaponifiable found was of: Carotenoids total (0.76%); Lutein (0.45%); Zeaxanthin (0.07%); α-carotene (0.05%); β-carotene (0.11%); 13 cisβ-carotene (0.05%) and 9-cisβ-carotene (0.03%).

show abstract

“…(Belle Mare), Nodularia harveyana (Albion), Nodularia harveyana (Albion) and micro-phytoplankton. The moisture content tallied with that of other literature (Patil et al 2008). This particular trait is attributed to the poikilohydric-characteristic of the microalgae (Campbell et al, 2004); consequently, high energy input is required to remove the water molecules.…”

Section: Moisture Contentmentioning

confidence: 99%

An investigation of biodiesel production from microalgae found in Mauritian waters

Beetul¹,

Sadally²,

Taleb-Hossenkhan³

et al. 2014

Biofuel Res. J.

View full text Add to dashboard Cite

HIGHLIGHTSTotal micro-phytoplankton count amounted to 6.59±1.27x10 5 cells L -1 which was dominated by diatoms (95.2%), followed by dinoflagellates (2.9%) and cyanobacteria (1.9%).  The cyanobacterial mats were identified as Leptolyngbya sp. and Nodularia harveyana, and the endosymbiotic dinoflagellates as the Symbiodinium clade C.  There were also differences recorded in the % lipid of the different microalgae (p<0.005) -among all, Symbiodinium clade C had the highest with (38.39±6.58%). The aim of this study was to assess the lipid content and the subsequent potential of different microalgae present in the Mauritian marine water to produce biodiesel. The share of micro-phytoplankton species in the water column was determined. The cyanobacterial mats and endosymbiotic dinoflagellates were characterised morphologically and genetically using RFLP. The samples were quantified gravimetrically and analysed using 1 H & 13 C NMR spectroscopy. Total micro-phytoplankton count amounted to 6.59±1.27x10 5 cells L -1 which was dominated by diatoms (95.2%), followed by dinoflagellates (2.9%) and cyanobacteria (1.9%). The cyanobacterial mats were identified as Leptolyngbya sp. and Nodularia harveyana, and the RFLP characterised the endosymbiotic dinoflagellates as the Symbiodinium clade C. The highest amount of lipid was recorded in the Symbiodinium clade C (38.39±6.58%).1 H and 13 C NMR analyses indicated the presence of acyl glycerols. An attempt to synthesise biodiesel by alkaline trans-esterification reaction was also performed and the presence of biodiesel was detected using the Fourier Transform Infrared Spectroscopy. The Infrared analysis yielded peaks at around 1738cm -1 and 1200cm -1 characteristic of the carbonyl and ether groups respectively, indicating the presence of biodiesel.

show abstract

Towards Sustainable Production of Biofuels from Microalgae

Cited by 424 publications

References 35 publications

Effect of operating conditions on yield and quality of biocrude during hydrothermal liquefaction of halophytic microalga Tetraselmis sp.

Effect of operating conditions on yield and quality of biocrude during hydrothermal liquefaction of halophytic microalga Tetraselmis sp.

Primary Separation of Antioxidants (Unsaponifiables) the Wet Biomass Microalgae <i>Chlamydomonas</i> sp. and Production of the Biodiesel

An investigation of biodiesel production from microalgae found in Mauritian waters

Contact Info

Product

Resources

About

Towards Sustainable Production of Biofuels from Microalgae

Cited by 424 publications

References 35 publications

Effect of operating conditions on yield and quality of biocrude during hydrothermal liquefaction of halophytic microalga Tetraselmis sp.

Effect of operating conditions on yield and quality of biocrude during hydrothermal liquefaction of halophytic microalga Tetraselmis sp.

Primary Separation of Antioxidants (Unsaponifiables) the Wet Biomass Microalgae &lt;i&gt;Chlamydomonas&lt;/i&gt; sp. and Production of the Biodiesel

An investigation of biodiesel production from microalgae found in Mauritian waters

Contact Info

Product

Resources

About

Primary Separation of Antioxidants (Unsaponifiables) the Wet Biomass Microalgae <i>Chlamydomonas</i> sp. and Production of the Biodiesel