Multi-criteria analysis of detoxification alternatives: Techno-economic and socio-environmental assessment

Llano, Tamara; Rueda, Cristina; Dosal, Elena; Andrés, A.; Coz, Alberto

doi:10.1016/j.biombioe.2021.106274

Cited by 10 publications

(3 citation statements)

References 54 publications

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“…The next step was detoxification to remove fermentation inhibitors, which are sugar degradation compounds (mostly carboxylic acids and furfurals) caused by the high pressures and temperatures reached in the hydrolysis step. Among the detoxification alternatives previously tested by the authors, the best one and also the one applied in this work was oveliming at pH 10 using Ca(OH) 2 at 30 • C, which has already been tested in lignocellulosic hydrolyzates [32,33], assuming a total inhibitor degradation of 50%, together with 11.2% of sugar losses. Before the fermentation step, the pH was adjusted to 5.0.…”

Section: Aspen Plus Modelling Of the Bioethanol Processmentioning

confidence: 99%

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Techno-Economic Analysis of Macroalgae Biorefineries: A Comparison between Ethanol and Butanol Facilities

et al. 2023

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Ulva rigida seaweed is constituted by ulvan, which is a sulfated polysaccharide with uses in a wide variety of applications. After the ulvan-oriented extraction process, a crystalline and recalcitrant residue, the so-called pulp, appears. In this work, this residue was valorized through a multiple-stage process. The total processing of the algae consists of hot water extraction, acid hydrolysis, ABE fermentation, and distillation in order to obtain not only ulvan but also butanol and bioethanol to be used as biofuels by simulating two third-generation algae-based biorefineries in Aspen Plus v10 software. Third-generation plants do not compete with food and algae biomass, and they do not require delignification nor pretreatment steps, which are usually the bottleneck of second-generation plants. A plant producing butanol as biofuel together with diluted ulvan, acetone, and ethanol as byproducts was modelled in Aspen Plus software. Regarding the profitability of the investment, the plants producing bioethanol and butanol were economically feasible. The economic parameters for the bioethanol and butanol plants were as follows: NPV equal to 27.66 M$ and 16.67 M$, and IRR equal to 46% and 37%, respectively. The discounted return period was acceptable for these types of plants, which were 4.11 and 3.16 years for the ABE biorefinery and the bioethanol biorefinery, respectively.

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Section: Aspen Plus Modelling Of the Bioethanol Processmentioning

confidence: 99%

“…To estimate cost production, the method described in Towler and Sinnot was used [32]. This method estimates the cost of construction and installation of every equipment from the flowsheet.…”

Section: Economic Assessmentmentioning

confidence: 99%

Techno-Economic Analysis of Macroalgae Biorefineries: A Comparison between Ethanol and Butanol Facilities

et al. 2023

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“…Neutralization, activated charcoal treatment, overliming, solvent extraction, ion-exchange resin treatment, and microbial detoxification are some of the commonly used detoxification methods. (Soares et al, 2016;Gupta et al, 2017;Kumar et al, 2018;Agarwal and Singh, 2019;Llano et al, 2021). Kumar et al (2019) have reported the efficient removal of acetic acid and salts in the hydrolysate by employing a detoxification method involving activated charcoal followed by membrane filtration.…”

Section: Inhibitors and Detoxificationmentioning

confidence: 99%

Xylitol: Bioproduction and Applications-A Review

et al. 2022

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Xylitol, a natural compound classified as a sugar alcohol, is found diversely in fruits and vegetables in small quantities. Commercial production of xylitol has expanded due to its health benefits and wide applications as an alternative sweetener in food and pharmaceutical products. Production of xylitol on large scale is industrially being achieved by the chemical method. However, the biotechnological method offers the possibilities of lowered cost and energy compared to the chemical methods. It involves the conversion of xylose to xylitol by microbes or enzymes which is environmentally safe. This review highlights the prospects of the biotechnological method of xylitol production. Various microorganisms that have been used to produce xylitol, the bioprocess parameters, and genetic modifications to increase xylitol yield have been reviewed. In addition, the applications, benefits, and safety concerns to health have been discussed.

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