Effect of lipid-free microalgal biomass and waste glycerol on growth and lipid production of Scenedesmus obliquus: Innovative waste recycling for extraordinary lipid production

Abomohra, Abd El‐Fatah; Eladel, Hamed; El‐Esawi, Mohamed A.; Wang, Shuang; Wang, Qian; He, Zhixia; Feng, Yongqiang; Shang, Hao; Hanelt, Dieter

doi:10.1016/j.biortech.2017.10.102

Cited by 107 publications

(34 citation statements)

References 35 publications

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“…As a consequence, the addition of glycerol can significantly increase total biomass and lipid concentration and it may add prodigious significant potential in the further development of algal biofuels (Abomohra et al, ; Paranjape et al, ; Varfolomeev & Wasserman, ; Wang et al, ). Glycerol practices with a different concentration needs to be investigated for more native strains for the improvement of green eco‐friendly energy in the form of biofuels.…”

Section: Discussionmentioning

confidence: 99%

“…The current utilization of natural oil products are multiple times faster than biosphere can produce. On the off chance that the advancement of the global energy utilization proceeds, the world will be compromised with an energy emergency (Abomohra et al, ). Hence, we need a low‐pollution alternative energy source.…”

Section: Introductionmentioning

confidence: 99%

“…For assessment of preeminent, eco‐friendly, and effective approach, it is prerequisite to expand the efficiency and develop economical approaches of biodiesel production from living organisms, let us say the most favorite one are microalgae (Kishore et al, ; Sajjadi, Chen, Raman, & Ibrahim, ). Friendly nature, higher yields per unit area, growing potentially in a variety of water and/or medium and yield more energy per unit weight related to other energy sources are the prevailing advantages of algae for biodiesel production (Abomohra et al, ; Leite, Paranjape, Abdelaziz, & Hallenbeck, ; Zheng et al, ).…”

Section: Introductionmentioning

confidence: 99%

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Morphological characterization, growth appraisal, and probing biofuels potential of newly isolated Scenedesmus sp. from desert Cholistan

Alam

Mumtaz

Hallenbeck

et al. 2019

Microscopy Res & Technique

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Microalgae have an excellent potential for producing valuable natural products, including biofuels. Therefore, it is imperative to explore and document the existing microalgal flora and utilize their potentials to cope the increasing human needs. The present work aims at exploring and characterizing newly isolated microalgae from desert Cholistan, a habitat with myriad algal diversity. Light microscopy, scanning electron microscopy, and molecular phylogenetic approaches were used for specieslevel identification. Characterization and growth optimization of Scendesmus sp. were analyzed under three different growth modes to determine the most favorable conditions for increasing biomass, growth rate, and lipid content. The results revealed that mixotrophic (MT) mode significantly increases photosynthetic activity, growth rate, and lipid content with glycerol as supplement carbon source. The investigated Scenedesmus dimorphous produced a maximum dry weight of 1.73 g L −1 , improved fatty acid methyl esters profile and yield lipid up to 40% of DCW (68 g L −1 ) under MT mode, which is almost double to that of photoautotrophic cultivation. The glycerol availability in medium has been identified as the critical element for boosting growth and lipid content. Thus, it can reduce the cost of biofuel production. K E Y W O R D S biofuels, biomass, indigenous desert species, phylogeny, SEM morphology

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Morphological characterization, growth appraisal, and probing biofuels potential of newly isolated Scenedesmus sp. from desert Cholistan

Alam

Mumtaz

Hallenbeck

et al. 2019

Microscopy Res & Technique

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“…The bio-oil yield and calorific value increased to approximately 34.7% and 39.4 kJ/g, respectively, by employing K 2 CO 3 as a catalyst. 29 Given the merits and demerits of water and organic solvents, many researchers have tried to use mixed solvents (cosolvents) as liquefied media. 24 The specific heat capacity of water is high; thus, high energy is needed to achieve the required temperature and pressure for the reaction.…”

Section: Introductionmentioning

confidence: 99%

“…28 However, the use of organic solvents as replacement water has dramatically increased the cost and also requires more energy for dehydration of raw materials, losing the cost advantage of liquefaction technology. 29 Given the merits and demerits of water and organic solvents, many researchers have tried to use mixed solvents (cosolvents) as liquefied media. It has been found that the cosolvent has not only been involved in the reduction of critical pressure and temperature of the reaction system, but also it leads to higher yield, reducing the oxygen and nitrogen proportion, and has a significant synergistic effect in the liquefaction process.…”

Section: Introductionmentioning

confidence: 99%

Effect of cosolvent and addition of catalyst (HZSM‐5) on hydrothermal liquefaction of macroalgae

et al. 2019

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Summary The present study aimed to evaluate the effect of the direct liquefaction of macroalgae in an autoclave reactor (50 mL) possessing water and ethanol as cosolvent. The reaction conditions such as duration, temperature, algae/solvent ratio, the composition of cosolvent (ethanol‐water) on product distribution, and bio‐oil characterization were studied. The optimum conditions such as 300°C of temperature, 45 minutes of reaction time, 75% of ethanol, and algae to solvent ratio of 4/40 g/mL supported the bio‐oil yield of 46.75% with a conversion rate of 95.5%. The composition and concentration of the compounds in the bio‐oil produced under various doses of catalyst were described using GC‐MS. The bio‐oil characterization showed that the esters were most predominant in hydrothermal liquefaction with a catalyst (HZSM‐5) compared with hydrothermal liquefaction in the absence of the catalyst.

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A sustainable approach for bioconversion of food and lignocellulosic wastes into liquid biofuel using a new Metschnikowia pulcherrima isolate

et al. 2020

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Summary In the present study, valorization of food and lignocellulosic wastes into biodiesel and 2‐phenylethanol using Metchinikowia pulcherrima isolated from rotten food wastes was evaluated. At the optimum pH of 5.5, food waste hydrolysate (FWH) showed 74.1% higher dry weight than the corresponding synthetic medium. Rice straw (RS) and softwood sawdust (WWA) were used as additional carbon sources to increase the C:N ratio of FWH. WWA enhanced the biomass production by 23.3% and 55.9% over the corresponding RS and FWH, respectively; while RS enhanced lipid accumulation. Due to enhancement of growth, 75 g WWA showed the maximum recorded lipid productivity of 2.49 g L−1 d−1. Interestingly, both hexoses and pentoses were effectively metabolized. Regarding fatty acid profile of M. pulcherrima, RS‐ and WWA‐enriched growth media showed higher saturated fatty acids proportions (56.9% and 98.3%, respectively, over that of FWH), with better biodiesel characteristics. FWH showed the heights significant production of 2‐phenylethanol up to 56.7 mg L−1 after 96 hours. However, FWH enriched with WWA showed the highest gross energy output of 33.98 GJ m−3 y−1. Thus, the present study suggested an integrated approach of M. pulcherrima cultivation on FWH enriched with WWA for efficient biofuel production through waste recycling.

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Effect of lipid-free microalgal biomass and waste glycerol on growth and lipid production of Scenedesmus obliquus: Innovative waste recycling for extraordinary lipid production

Cited by 107 publications

References 35 publications

Morphological characterization, growth appraisal, and probing biofuels potential of newly isolated Scenedesmus sp. from desert Cholistan

Morphological characterization, growth appraisal, and probing biofuels potential of newly isolated Scenedesmus sp. from desert Cholistan

Effect of cosolvent and addition of catalyst (HZSM‐5) on hydrothermal liquefaction of macroalgae

A sustainable approach for bioconversion of food and lignocellulosic wastes into liquid biofuel using a new Metschnikowia pulcherrima isolate

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