Characterization, pretreatment and saccharification of spent seaweed biomass for bioethanol production using baker's yeast

Sudhakar, M.; Ravel, Merlyn; Arunkumar, K.; Perumal, K.

doi:10.1016/j.biombioe.2016.03.031

Cited by 54 publications

(14 citation statements)

References 47 publications

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“…Sudhakar et al [69] proposed the use of the spent biomass from Gracilaria corticata remaining after pigment extraction with 0.1 M potassium phosphate buffer. This waste fraction contained 19% polysaccharides, 1% protein and 0.2% phenolics, and was destined to the production of ethanol, after an acid pretreatment (Figure 2a).…”

Section: Biorefinery Strategiesmentioning

confidence: 99%

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Successful Approaches for a Red Seaweed Biorefinery

et al. 2019

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Macroalgae have been commercially exploited as food and for the production of phycocolloids, but they also contain compounds with potential in pharmaceutical, nutraceutical, cosmetic, chemical and energetic applications. The biorefinery concept applied to seaweed facilitates the extraction of different constituents ensuring full utilization of resources and generating few residues through a succession of steps. Seaweed biorefineries are less advanced than those based on terrestrial biomass and the design of efficient processes requires further study. This review presents practical successful examples to obtain two or more commercially valuable components from red seaweeds. The selected processes consist on cascading stages of both conventional and alternative techniques to illustrate different possible valorization strategies.

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Section: Biorefinery Strategiesmentioning

confidence: 99%

“…Example of valorization of the solid remaining after phycobiliproteins extraction ( a ) for ethanol production from G. corticata [69] and ( b ) for bio-oil and biochar from G. gracilis [42]. …”

Section: Figurementioning

confidence: 99%

Successful Approaches for a Red Seaweed Biorefinery

et al. 2019

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“…The growing demand for fuel has led to an increase in the use of liquid fuels, however, the availability of energy from nonrenewable sources is limited and their exploration, transformation and use can generate serious impacts on the environment. In this sense, biofuels can be a viable alternative to increase the ethanol production required to meet world demand, being a renewable source of energy widely accepted as an alternative to fossil fuels (Sudhakara et al 2016).…”

Section: Introductionmentioning

confidence: 99%

“…One of the main problems related to the biomass pretreatment is the generation of toxic compounds during the biomass hydrolysis process, which negatively interfere in the microbial metabolism, affecting the conversion of sugars into the product and therefore need to be removed (Sudhakara et al 2016). During hemicellulose hydrolysis, inhibitors such as furfural and hydroxymethylfurfural are generated from pentoses and hexoses degradation, respectively and formic and levulinic acids can also be formed as a result of the degradation of these inhibitors (Jönsson and Martín 2016).…”

Section: Introductionmentioning

confidence: 99%

Characterization of the solid residue generated in the detoxification step of sugarcane bagasse hemicellulosic hydrolysate and behavior in agricultural soils

et al. 2020

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Overliming is an effective way of neutralizing and reducing the toxicity of the hydrolysates generated from acidic pretreatment of lignocellulosic biomass for ethanol production and others biotechnological products. Overliming generates a solid residue whose inadequate disposal may represent an environmental problem. This work aimed at the chemical characterization of the solid residue generated during the detoxification of the sugarcane bagasse hemicellulosic hydrolysate and evaluation of its behavior in soil. The solid residue was submitted to physicochemical and granulometric analysis and determination of the contents of sugars, metals and toxic compounds (acetic acid, furfural, hydroxymethylfurfural and phenols). The potential of the residue as corrective of soil acidity was determined by analyzing the quality attributes of soil correctives (neutralizing power-NP, relative total neutralizing power-RTNP, Ca and Mg contents and granulometry). The residue was also evaluated for its influence on soil microbial communities and toxicity through bioassays with Lactuca sativa seeds. The residue contributed to the overall improvement of soil chemical attributes. The levels of Ca, Mg, C, OM and CEC were increased, nutrients such as Zn, Fe, Ni, Cr and Mn were detected, and microbial communities were stimulated. Besides, the residue showed no significant values of toxic compounds and no toxicity to L. sativa seeds. The residue was able to reduce the soil pH and to keep it stable throughout the study period. As a higher amount of the residue was necessary to reach pH 7 than limestone, it should be used as an auxiliary corrective of acidity.

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“…The exploitation of fossil fuels is responsible for 73% of global carbon dioxide emissions which are considered to be the main factor contributing to global warming and environmental changes [1,2]. The limited resources of fossil fuels, the increasing costs of these fuels, and concerns about climate change are the main reasons to trend towards biofuel production like bioethanol, biodiesel and biomethane [3]. Thus, the importance of microbial production of bioethanol has risen for many years.…”

Section: Introductionmentioning

confidence: 99%

Optimization of an Industrial Medium from Molasses for Bioethanol Production Using the Taguchi Statistical Experimental-Design Method

Darvishi

Moghaddami

2019

Fermentation

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The production of bioethanol as a clean liquid fuel in a cost-effective way is highly desired by global energetics. Sugar beet molasses is a renewable and cheap substrate for the production of biotechnological products. Therefore, the aim of the current study was the optimization of an industrial medium from molasses for bioethanol production using the Taguchi statistical experimental-design method. First, the growth rate of yeast cells and the amount of ethanol produced by the Saccharomyces cerevisiae strain sahand 101 were investigated in aerobic and aerobic–anaerobic conditions. The yeast strain produced 8% (v/v) bioethanol in a medium containing molasses with 18% Brix in aerobic–anaerobic conditions. The main factors of the medium, including molasses, ammonium sulfate, urea, and pH, were optimized for the increase of bioethanol production by the Taguchi method. Bioethanol production reached 10% (v/v) after optimization of the medium in flask culture. The yeast strain produced 11% (v/v) bioethanol in the bioreactor culture containing the optimized medium, which is an acceptable amount of bioethanol produced from molasses at the industrial scale. The results showed that the Taguchi method is an effective method for the design of experiments aiming to optimize the medium for bioethanol production by reducing the number of experiments and time.

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Characterization, pretreatment and saccharification of spent seaweed biomass for bioethanol production using baker's yeast

Cited by 54 publications

References 47 publications

Successful Approaches for a Red Seaweed Biorefinery

Successful Approaches for a Red Seaweed Biorefinery

Characterization of the solid residue generated in the detoxification step of sugarcane bagasse hemicellulosic hydrolysate and behavior in agricultural soils

Optimization of an Industrial Medium from Molasses for Bioethanol Production Using the Taguchi Statistical Experimental-Design Method

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