Effect of pretreatments on corn stalk chemical properties for biogas production purposes

Venturin, Bruno; Camargo, Aline Frumi; Scapini, Thamarys; Mulinari, Jéssica; Bonatto, Charline; Bazoti, Suzana F.; Siqueira, Diego Pereira; Colla, Luciane Maria; Alves, Sérgio L.; Bender, João Paulo; Steinmetz, R. L. R.; Kunz, Airton; Fongaro, Gislaine; Treichel, Helen

doi:10.1016/j.biortech.2018.06.069

Cited by 84 publications

(45 citation statements)

References 34 publications

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“…In our study, we pretreated corn stalk under environmentally friendly conditions (2% Na 2 CO 3 + 2% H 2 O 2 ; time, 70 min; temperature, 130°C; ratio of material to liquid, 1:10) and showed that the pretreatment led to a reduction in lignin and a maximal retention of cellulose and hemicellulose, consistent with the results published by Venturin et al [24] Han et al [25] showed that the removal of lignin by the strong alkali NaOH will simultaneously destroy the chemical bond of hemicellulose, which resulted in a decrease in the hemicellulose content and the exposure of some cellulose such that the cellulose enzymatic glucose content is higher and the xylose yield is lower. Na 2 CO 3 is mild alkali that causes a relatively low amount of chemical bond damage to hemicellulose, and better preserves the hemicellulose component.…”

Section: Discussionsupporting

confidence: 90%

Ethanol production by simultaneous saccharification and cofermentation of pretreated corn stalk

Zhao

Zhang

et al. 2019

J Basic Microbiol

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The recalcitrance of lignocellulosic biomass is a major factor limiting its conversion into biofuels. Therefore, in this study, we pretreated corn stalk with 2% Na2CO3 and 2% H2O2 for time 70 min at 130°C using a corn stalk to liquid ratio of 1:10. The fermentation broth from multicopy Saccharomyces cerevisiae strains engineered for lignocellulase synthesis was used to enzymatically hydrolyze the pretreated corn stalk. The highest monosaccharide yield (102 mmol/L) was obtained using 15 IU endocellulase, 10 IU exocellulase, and 15 IU β‐glucosidase per gram of cellulose and 20 IU xylanase per gram of hemicellulose. Subsequently, the high‐efficiency ethanol‐producing S. cerevisiae strain WXY12, which can produce ethanol from glucose and xylose simultaneously, was added to the fermentation system. The entire process involved ethanol production through simultaneous saccharification and fermentation (SSF). Optimization of the fermentation conditions (yeast powder as a nitrogen source, temperature of 30°C, MgSO4 as a metal ion inducer, rotation speed of 180 rpm, solid–liquid ratio of 1:8, and inoculation amount of 2%) resulted in an ethanol output of 46.87 g/L and a theoretical conversion rate of 27.4%. The results of this study improved corn stalk utilization, reduced hydrolysis costs, and generated high ethanol yields.

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Section: Discussionsupporting

confidence: 90%

Ethanol production by simultaneous saccharification and cofermentation of pretreated corn stalk

Zhao

Zhang

et al. 2019

J Basic Microbiol

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“…Among such sustainable materials for renewable fuels generation are lignocelluloses which are very abundant globally as huge energy carriers due to their ability to be converted into various forms of energy [8e11]. Among the numerous energy form derived from lignocellulose is methane which has found lots of useful applications domestically and industrially especially because it is a source of clean energy with high hydrogen to carbon ratio [12]. The process of methane formation from wastes, biomass or any other resource is called anaerobic digestion (AD) which is a microbial mediated/controlled process usually progressing in four different stages with each having diverse array of microorganisms in succession.…”

Section: Introductionmentioning

confidence: 99%

“…Acids have been used in biomass pretreatment with some improvements in the digestion performance. The most common acid in this process has been sulfuric acid which have been documented to be very potent in the total removal of the hemicellulose component of corn stalk, whole corn stalk, Sorghum stalk, grasses and other lignocelluloses after pretreatment [12,18,19].…”

Section: Introductionmentioning

confidence: 99%

Liquefaction of pineapple peel: Pretreatment and process optimization

Dahunsi

2019

Energy

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a b s t r a c tThis study explored the optimization of pretreatment of pineapple peel for biogas generation. Pretreatments were carried out sulfuric acid and alkaline hydrogen peroxide prior to anaerobic digestion while the response surface methodology (RSM) was used for optimization of the pretreatment procedures. The physical, chemical, proximate and structural compositions of the peels were determined prior to and at the end of the pretreatment procedures. The dynamics of microorganisms in the reactors were also evaluated by rapid molecular methods while the Fourier Transform Infra-red (FTIR) spectroscopy was employed in the identification of the chemical changes as a result of pretreatments. The use of H 2 O 2 pretreatment caused enormous lignin solubilization in the pineapple peel. In comparison, biogas production was 67% more in the alkaline pretreated pineapple peel than the biomass treated with acid and also 51% over the untreated samples. The total biogas volume produced from the acidic pretreated, alkaline pretreated, not sifted untreated and sifted untreated samples are 194.2 ± 3.0, 587.5 ± 5.2, 287.8 ± 2.1 and 245.4 ± 3.1 respectively. Thus, the alkaline pretreated experiment used lower retention time to achieve maximum gas production in this study. The use of alkaline H 2 O 2 on lignocelluloses has remained unpopular prior to this study. However, its usage in this study yielded better result than all the conventional treatments in terms of lignin solubilization and improvement in methane yield. Economically, the use of H 2 O 2 for pretreatment is adjudged feasible because the 1504 kWh t À1 TS thermal energy gain obtained from the biogas produced by the alkaline treated peel exceeded the 921 kWh t À1 TS used in the pretreatment. This gives a net thermal energy of 583 kWh t À1 TS. Whereas, the investment into acidic pretreatment of pineapple peel may not be economically justified because the total thermal energy gain of À200 kWh t À1 TS was far lower than the 1236 kWh t À1 TS thermal energy that was consumed during the pretreatment giving a net thermal energy of À1436 kWh t À1 TS. Therefore, the use of mild alkaline pretreatment is advocated in biogas generation from pineapple peel and also for biofertilizer production mostly in localities of mass production.

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“…Amon et al achieved the highest methane productivity from manure obtained from medium‐yielding cows fed a well‐balanced diet. Refined biogas in the form of biomethane can serve to generate electricity, thermal energy, or to power engine vehicles . Harun et al tested experimentally the usefulness of six dominant species of microalgae as alternative substrates in biogas production.…”

Section: Feedstocks Technologies and Factors Design To Intensify Bimentioning

confidence: 99%

“…Biogas produced from organic waste is counted among the most promising renewable energy resources . Methane and carbon dioxide, which are the main components of biogas, add to the greenhouse gas effect if released from landfills, WWTPs or farms.…”

Section: Introductionmentioning

confidence: 99%

Intensification of biogas production using various technologies: A review

et al. 2020

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Summary Anaerobic digestion (AD) is an organic matter conversion technology which offers a wide range of options for production of biogas from organic biomass, providing an excellent opportunity to convert abundant bioresources into safe, eco‐friendly, renewable energy. Important factors in the process of AD are the biodiversity of microorganisms, chemical load of oxygen demand, and content of water and total solids. A challenge for the future is to find technologies that will maximally enhance biogas production and to find pathways for biogas to supersede well‐established technologies and practices in the contemporary heavily fossil fuel‐based energy system. Current studies on technologies of biogas production indicate a number of possibilities of using appropriate biological and physicochemical additives, like added enzymes or fruit pomace, as well as immobilizing microorganisms on biofilters. Anaerobic biorefinery is an emerging concept that generates not only bioenergy but also high‐value biochemical products from the same feedstock. This study is a review of articles describing the intensification of biogas production by using various technologies.

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Effect of pretreatments on corn stalk chemical properties for biogas production purposes

Cited by 84 publications

References 34 publications

Ethanol production by simultaneous saccharification and cofermentation of pretreated corn stalk

Ethanol production by simultaneous saccharification and cofermentation of pretreated corn stalk

Liquefaction of pineapple peel: Pretreatment and process optimization

Intensification of biogas production using various technologies: A review

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