Enhancing methane production of corn stover through a novel way: Sequent pretreatment of potassium hydroxide and steam explosion

Li, Jianghao; Zhang, Ruihong; Siddhu, Muhammad Abdul Hanan; He, Yiming; Wang, Wen; Li, Yeqing; Chen, Chang; Liu, Guangqing

doi:10.1016/j.biortech.2015.01.050

Cited by 71 publications

(39 citation statements)

References 27 publications

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“…It has been also reported that 2.5% KOH-treated CS generates maximum methane yield of 295 mL/g VS, and significantly improved 95.6% with regard to untreated CS (Li et al 2015b). However, the high chemical loading, the toxicity to microbes, the high cost when applied in large scale, and the environmental pollution caused by the KOH is also reported (Li et al 2015a). …”

Section: Pretreatment Methodsmentioning

confidence: 99%

Pretreatment methods of lignocellulosic biomass for anaerobic digestion

et al. 2017

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Agricultural residues, such as lignocellulosic materials (LM), are the most attractive renewable bioenergy sources and are abundantly found in nature. Anaerobic digestion has been extensively studied for the effective utilization of LM for biogas production. Experimental investigation of physiochemical changes that occur during pretreatment is needed for developing mechanistic and effective models that can be employed for the rational design of pretreatment processes. Various-cutting edge pretreatment technologies (physical, chemical and biological) are being tested on the pilot scale. These different pretreatment methods are widely described in this paper, among them, microaerobic pretreatment (MP) has gained attention as a potential pretreatment method for the degradation of LM, which just requires a limited amount of oxygen (or air) supplied directly during the pretreatment step. MP involves microbial communities under mild conditions (temperature and pressure), uses fewer enzymes and less energy for methane production, and is probably the most promising and environmentally friendly technique in the long run. Moreover, it is technically and economically feasible to use microorganisms instead of expensive chemicals, biological enzymes or mechanical equipment. The information provided in this paper, will endow readers with the background knowledge necessary for finding a promising solution to methane production.

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Section: Pretreatment Methodsmentioning

confidence: 99%

Pretreatment methods of lignocellulosic biomass for anaerobic digestion

et al. 2017

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“…The hydrolysis is the rate limiting step in which the lignin barrier is broken down (Appels et al, 2008). Known methods for improving the hydrolysis step are acidic, mechanical, thermal and biological pretreatments (Pilli et al, 2014;Li et al, 2015). Acidic, mechanical and thermal pretreatments have been shown effective on lignin degradation, however these techniques are more costly and result in a higher production of inhibitory compounds such as p-coumaric acid and 4-hydroxybenzoic acid Kratky and Jirout, 2015).…”

Section: Introductionmentioning

confidence: 99%

Effect of enzymatic pretreatment of various lignocellulosic substrates on production of phenolic compounds and biomethane potential

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et al. 2015

Bioresource Technology

104

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“…Here it can be noticed that, after the sieving operation, the oversized CR portion (not used in this research) would possibly contain a higher amount of lignin due to its strong structure. Untreated CR can produce 143.8 L kg −1 VS methane [41] to 186.74 L kg −1 VS methane [40]. Here it can be noticed that CR contains high moisture (≥50%) during corn harvesting time and it needs drying before grinding, which consumes drying and grinding operational energy, but if it is possible to blend into <500 µm size material, then the same result can be attained.…”

Section: Composition Of Corn Residue and Its Alkaline Hydrothermal Prmentioning

confidence: 92%

“…Steam explosion at 250 • C and 1.2 MPa for 10 min produced 55% more methane than untreated CR of 144 L kg −1 VS as the maximum whereas 1.5% KOH treated CR produced 45% more methane. On the other hand, 1.5% KOH mixed CR at 250 • C and 1.2 MPa for 10 min produced 80% more methane than untreated CR of 143.8 L kg −1 VS [41].…”

Section: Introductionmentioning

confidence: 92%

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Mechanical and Alkaline Hydrothermal Treated Corn Residue Conversion in to Bioenergy and Biofertilizer: A Resource Recovery Concept

2018

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In this research fall time harvested corn residue (CR) was first mechanically pretreated to produce 5 mm chopped and <500 µm ground particles, which underwent an anaerobic digestion (AD) process to produce biomethane and biofertilizer. Another sample of CR was pretreated by an alkaline hydrothermal (HT) process using 1%, 2% and 3% NaOH to produce solid biocarbon and the resulting alkaline hydrothermal process water (AHTPW), a co-product of biocarbon, underwent fast digestion under AD conditions to produce biomethane and biofertilizer. A predetermined HT process of 240 °C for 30 min was considered and the effect of alkali content on the HT process for biocarbon and biomethane product a rate of 8.21 MJ kg−1 and 9.23 MJ kg−1 of raw CR, respectively. Among the three selected alkaline HT processes, the 1% NaOH HT process produced the highest hybrid bioenergy of 11.39 MJ kg−1 of raw CR with an overall energy recovery of 62.82% of raw CR. The AHTPW of 2% and 3% NaOH HT-treated CR did not produce considerable amount of biomethane and their biocarbons contained 3.44 MJ kg−1 and 3.27 MJ kg−1 of raw CR of bioenergy, respectively. The biomethane produced from 5 mm chopped CR, <500 µm ground CR and 1% alkaline AHTPW for 30 days retention time were of 275.38 L kg−1 volatile solid (VS), 309.59 L kg−1 VS and 278.70 L kg−1 VS, respectively, compared to non-treated CR of 144–187 L kg−1 VS. Nutrient enriched AD digestate is useable as liquid fertilizer. Biocarbon, biomethane and biofertilizer produced from the 1% alkaline HT process at 240 °C for 30 min can reduce the greenhouse gas (GHG) emissions of Ontario.

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Enhancing methane production of corn stover through a novel way: Sequent pretreatment of potassium hydroxide and steam explosion

Cited by 71 publications

References 27 publications

Pretreatment methods of lignocellulosic biomass for anaerobic digestion

Pretreatment methods of lignocellulosic biomass for anaerobic digestion

Effect of enzymatic pretreatment of various lignocellulosic substrates on production of phenolic compounds and biomethane potential

Mechanical and Alkaline Hydrothermal Treated Corn Residue Conversion in to Bioenergy and Biofertilizer: A Resource Recovery Concept

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