Screening of seaweeds for sustainable biofuel recovery through sequential biodiesel and bioethanol production

Osman, Mohamed E.; Abo-Shady, Atef M.; Elshobary, Mostafa E.; El-Ghafar, Mahasen O. Abd; Abomohra, Abd El‐Fatah

doi:10.1007/s11356-020-09534-1

Cited by 62 publications

(39 citation statements)

References 60 publications

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“…The amount of heat generated by the complete combustion of a unit quantity of fuel is referred to as HHV (higher heating value). The HHV value (39.87 MJ kg −1 ) observed in this study was acceptable according to the previous studies [77][78][79], and it agrees with previous findings for Anabaena variabilis MBDU 013 and Anabaena anomala MBDU 629 (41.44 and 40.26 MJ kg −1 , respectively) [62]. Overall, A. variabilis under −50% N-NO 3 − produced qualified biodiesel that met international requirements and could compete with fossil diesel.…”

Section: Biodiesel Propertiessupporting

confidence: 91%

Influence of Nutrient Manipulation on Growth and Biochemical Constituent in Anabaena variabilis and Nostoc muscorum to Enhance Biodiesel Production

et al. 2021

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The present study aims to improve biomass and biochemical constituents, especially lipid production of Anabaena variabilis and Nostoc muscorum by formulating an optimal growth condition using various concentrations of nutrients (NO3−, PO43− and CO32−) for biodiesel production. The supplementation of the three nutrients by +50% showed the maximum dry weight and biomass productivity, while the macromolecule contents were varied. The depletion of N-NO3− by 50% N-NO3− showed the maximum lipid yield (146.67 mg L−1) in A. variabilis and the maximum carbohydrate contents (285.33 mg L−1) in N. muscorum with an increase of 35% and 30% over control of the synthetic medium, respectively. However, variation in P-PO43− and C-CO32− showed insignificant improving results for all biochemical compositions in both cyanobacteria. A. variabilis was the superior species for lipid and protein accumulation; however, N. muscorum showed the maximum carbohydrate content. Accordingly, A. variabilis was selected for biodiesel production. In A. variabilis, −50% N-NO3− resulted in 35% higher lipid productivity compared to the control. Furthermore, the fatty acid profile and biodiesel quality-related parameters have improved under this condition. This study has revealed the strategies to improve A. variabilis lipid productivity for biodiesel production for small-scale in vitro application in terms of fuel quality under low nitrate levels.

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Section: Biodiesel Propertiessupporting

confidence: 91%

Influence of Nutrient Manipulation on Growth and Biochemical Constituent in Anabaena variabilis and Nostoc muscorum to Enhance Biodiesel Production

et al. 2021

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“…Consequently, the total energy output in the third route was 6-times and 28.3% higher than that from the first and second routes, respectively. It is noteworthy to mention that the maximum total energy recovery obtained in the present study (9.96 MJ kg −1 ) is ≈1.9-time higher than that recorded for U. intestinalis in our previous study, 10 due to the higher bioethanol yield of D. fasciola as discussed in Section 3.4.2. Although microalgae showed higher energy output by sequential bioethanol and biodiesel production (21.4 MJ kg −1 dry microalgal biomass), 9 the elevated cost of microalgae cultivation, harvest and downstream processing remains a main challenge for their commercialization.…”

Section: Energy Outputcontrasting

confidence: 60%

Sequential biofuel production from seaweeds enhances the energy recovery: A case study for biodiesel and bioethanol production

Elshobary

El-Shenody

Abomohra

2020

Intl J of Energy Research

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In the present study, eight seaweeds (five red, two brown and one green) were collected and evaluated for dual biodiesel and/or bioethanol production. The highest significant lipid and carbohydrate contents were recorded in the brown seaweed Dilophus fasciola (4.92 and 37.97%dw, respectively). Three routes were investigated, namely R1 and R2 for direct production of biodiesel and bioethanol, respectively, from the whole biomass, in addition to R3 representing the sequential biodiesel and bioethanol production. D. fasciola showed a biodiesel yield of 35.04 mg g −1 dw, composed mainly of C16-C18 fatty acids with a high saturation degree. All biodiesel characteristics complied with the recommended values of international standards. The maximum reducing sugar content (37.2 g L −1) and bioethanol productivity at 72 hours (0.165 g L −1 h −1) were recorded in the lipid-free biomass (R3), which were 16.3% and 27.9%, respectively, higher than that of R2. Therefore, a maximum estimated total energy output of 9.96 MJ kg −1 was recorded in R3, which represented 6-times and 28.3% higher than R1 and R2, respectively.

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“…Overall, seaweeds are an untapped source of several organic and inorganic components; improving plant quantity and quality, by promoting plant growth, besides defense and immune response [ 17 , 18 , 19 ]. The Egyptian coastline, including the Mediterranean [ 20 , 21 , 22 ], and Red Sea coasts [ 16 , 19 , 23 ], has a heterogeneous variation of wild seaweed genera that could regenerate and been collected throughout the year. The most common native seaweed species along Alexandria’s Mediterranean coast, Egypt are red alga; Pterocladia capillacea, Jania rubens , and green alga; Ulva lactuca .…”

Section: Introductionmentioning

confidence: 99%

Impact of Commercial Seaweed Liquid Extract (TAM®) Biostimulant and Its Bioactive Molecules on Growth and Antioxidant Activities of Hot Pepper (Capsicum annuum)

Ashour

Hassan

Elshobary

et al. 2021

Plants

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Bioactive molecules derived from seaweed extracts are revolutionary bio-stimulants used to enhance plant growth and increase yield production. This study evaluated the effectiveness of a commercially available seaweed liquid extract, namely, True-Algae-Max (TAM®), as a plant growth stimulant on nutritional, and antioxidant activity of Capsicum annuum. Three concentrations of TAM® (0.25, 0.5, and 1%) of various NPK: TAM® ratios were investigated via foliar spray, over 2017 and 2018 cultivation seasons, under greenhouse conditions. TAM® is rich in phytochemical compounds, such as ascorbic acid (1.66 mg g−1), phenolics (101.67 mg g−1), and flavonoids (2.60 mg g−1) that showed good antioxidant activity (54.52 mg g−1) and DPPH inhibition of 70.33%. Promoting measured parameter results stated the extensive potentiality of TAM® application, in comparison with conventional NPK treatment. Yield and composition of C. annuum were significantly improved in all TAM® treated groups, especially the TAM0.5% concentration, which resulted in maximum yield (4.23 Kg m−2) and significant amounts of profuse biological molecules like chlorophyll, ascorbic, phenolic compounds, flavonoids, and total nutrients. Compared to the NPK control treatments, C. annuum treated with TAM0.5% improved the total antioxidant activity of hot Pepper from 162.16 to 190.95 mg g−1. These findings indicate that the extract of seaweed can be used as an environmentally friendly, multi-functional biostimulant in the agricultural field for more sustainable production, in addition to reducing the use of hazardous synthetic fertilizers.

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Screening of seaweeds for sustainable biofuel recovery through sequential biodiesel and bioethanol production

Cited by 62 publications

References 60 publications

Influence of Nutrient Manipulation on Growth and Biochemical Constituent in Anabaena variabilis and Nostoc muscorum to Enhance Biodiesel Production

Influence of Nutrient Manipulation on Growth and Biochemical Constituent in Anabaena variabilis and Nostoc muscorum to Enhance Biodiesel Production

Sequential biofuel production from seaweeds enhances the energy recovery: A case study for biodiesel and bioethanol production

Impact of Commercial Seaweed Liquid Extract (TAM®) Biostimulant and Its Bioactive Molecules on Growth and Antioxidant Activities of Hot Pepper (Capsicum annuum)

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