Third Generation Biorefineries Using Micro- and Macro-Algae

Saxena, Rohit; Rosero-Chasoy, Gilver; Aparicio, Elizabeth M.; Lara, Abraham; Loredo‐Treviño, Araceli; Robledo‐Olivo, Armando; Kostas, Emily T.; Rodríguez-Jasso, Rosa M.; Ruíz, Héctor A.

doi:10.1007/978-981-16-6162-4_12

Cited by 5 publications

(4 citation statements)

References 169 publications

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“…Thermal hydrolysis is most advantageous for brown seaweed application and needs to be explored in depth to assess scalability. On the other hand, this promising technique for the treatment of brown seaweed stands out due to its positive aspects that include the increase in methane productivity, the resulting energy balance, generating a biofertilizer, and mitigation of greenhouse gas emissions [34].…”

Section: Discussionmentioning

confidence: 99%

“…It was necessary for this study to perform hydrothermal pretreatments; during these processes, polysaccharides are hydrolyzed to monomers [31,32]. This technology reduces operating costs and increases efficiency in the fermentation process; for this reason, it has been explored to optimize saccharification before the bioprocess [33,34]. Figures 2 and 3 show that in the boxplot, it was determined that the growth rate of Aspergillus species was higher in the hydrothermal pretreatment of 170 C (Table 3).…”

Section: Hydrothermal Pretreatment Of Sargassum Sppmentioning

confidence: 99%

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Fungal Proteins from Sargassum spp. Using Solid-State Fermentation as a Green Bioprocess Strategy

et al. 2022

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The development of green technologies and bioprocesses such as solid-state fermentation (SSF) is important for the processing of macroalgae biomass and to reduce the negative effect of Sargassum spp. on marine ecosystems, as well as the production of compounds with high added value such as fungal proteins. In the present study, Sargassum spp. biomass was subjected to hydrothermal pretreatments at different operating temperatures (150, 170, and 190 °C) and pressures (3.75, 6.91, and 11.54 bar) for 50 min, obtaining a glucan-rich substrate (17.99, 23.86, and 25.38 g/100 g d.w., respectively). The results indicate that Sargassum pretreated at a pretreatment temperature of 170 °C was suitable for fungal growth. SSF was performed in packed-bed bioreactors, obtaining the highest protein content at 96 h (6.6%) and the lowest content at 72 h (4.6%). In contrast, it was observed that the production of fungal proteins is related to the concentration of sugars. Furthermore, fermentation results in a reduction in antinutritional elements, such as heavy metals (As, Cd, Pb, Hg, and Sn), and there is a decrease in ash content during fermentation kinetics. Finally, this work shows that Aspergillus oryzae can assimilate nutrients found in the pretreated Sargassum spp. to produce fungal proteins as a strategy for the food industry.

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Section: Discussionmentioning

confidence: 99%

Section: Hydrothermal Pretreatment Of Sargassum Sppmentioning

confidence: 99%

Fungal Proteins from Sargassum spp. Using Solid-State Fermentation as a Green Bioprocess Strategy

et al. 2022

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“…In this scenario, microalgae are thought to be an effective biological system for collecting solar energy and uptaking atmospheric CO 2 to create organic compounds, including biofuels, food supplements, pigments, and antioxidants [1]. Microalgae have a superior photosynthetic efficiency capacity to terrestrial plants [1,6]. Microalgal biomass includes multiple components that may be manipulated by modifying culture conditions, including lipids, carbohydrates, pigments, and so on.…”

Section: Introductionmentioning

confidence: 99%

Strategy Development for Microalgae Spirulina platensis Biomass Cultivation in a Bubble Photobioreactor to Promote High Carbohydrate Content

et al. 2022

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As a counter to climate change, energy crises, and global warming, microalgal biomass has gained a lot of interest as a sustainable and environmentally favorable biofuel feedstock. Microalgal carbohydrate is considered one of the promising feedstocks for biofuel produced via the bioconversion route under a biorefinery system. However, the present culture technique, which uses a commercial medium, has poor biomass and carbohydrate productivity, creating a bottleneck for long-term microalgal-carbohydrate-based biofuel generation. This current investigation aims toward the simultaneous increase in biomass and carbohydrate accumulation of Spirulina platensis by formulating an optimal growth condition under different concentrations of nitrogen and phosphorous in flasks and a bubble photobioreactor. For this purpose, the lack of nitrogen (NaNO3) and phosphorous (K2HPO4) in the culture medium resulted in an enhanced Spirulina platensis biomass and total carbohydrate 0.93 ± 0.00 g/L and 74.44% (w/w), respectively. This research is a significant step in defining culture conditions that might be used to tune the carbohydrate content of Spirulina.

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“…One of the drawbacks of SFE is that several variables must be optimized to achieve acceptable yields [34]. Recently, SC-CO 2 extraction has been extensively used in lipid isolation from macroalgae [35][36][37][38][39]. However, the SC-CO 2 extraction of O. intermedium has not yet been investigated.…”

Section: Weihs* Gobinath Pillai Rajarathnam Ali Abbas*mentioning

confidence: 99%

Adding Value to Wastewater Bioremediation by Lipid Extraction from Oedogonium intermedium

et al. 2023

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Macroalgae bioremediation is a potential way to deal with the escalating problem of arsenic contamination. The results of this study demonstrate that the arsenic content in wastewater treated by Oedogonium intermedium decreases by 32% from 1.13 ± 0.01 to 0.77 ± 0.03 ppb. Then, supercritical carbon dioxide (SC‐CO2) extraction was employed to isolate lipids from O. intermedium. Response surface methodology based on the Box‐Behnken design was carried out to optimize the SC‐CO2 extraction conditions of pressure (200–400 bar), temperature (30–50 °C), and extraction time (30–90 min). The optimal conditions from the model are predicted as 301.95 bar, 41.3 °C, and 30.53 min with 3.24 % lipid yield, 61.30 % PUFA ratio, and 0.106 µg g−1 of arsenic content, respectively.

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Third Generation Biorefineries Using Micro- and Macro-Algae

Cited by 5 publications

References 169 publications

Fungal Proteins from Sargassum spp. Using Solid-State Fermentation as a Green Bioprocess Strategy

Fungal Proteins from Sargassum spp. Using Solid-State Fermentation as a Green Bioprocess Strategy

Strategy Development for Microalgae Spirulina platensis Biomass Cultivation in a Bubble Photobioreactor to Promote High Carbohydrate Content

Adding Value to Wastewater Bioremediation by Lipid Extraction from Oedogonium intermedium

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