Dual-frequency ultrasound combined with alkali pretreatment of corn stalk for enhanced biogas production

Chen, Dong; Chen, Juan; Guan, Ruolin; Li, Xiujin; Xin, Yuefeng

doi:10.1016/j.renene.2018.03.088

Cited by 55 publications

(12 citation statements)

References 22 publications

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“…Although chemical pretreatment methods can greatly promote the fermentation process, they may not be applied in practical situations because of their high costs and secondary contamination. During batch anaerobic fermentation, the growth of microorganisms requires small-molecule organic matter as the fermentation material, while a lack of nitrogen can reduce the efficiency of anaerobic digestion [13][14][15][16][17][18] . Ammoniation pretreatment not only has the same alkalization effect, but also provides the nitrogen source [19][20][21][22] .…”

Section: Introduction mentioning

confidence: 99%

Effects of urea ammonia pretreatment on the batch anaerobic fermentation efficiency of corn stovers

Yang

Zheng

et al. 2019

International Journal of Agricultural and Biological Engineering

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In order to enhance the biogas production and provide nitrogen sources for the growth of microorganisms, experiments on urea ammonia pretreatment of corn stovers were implemented at (35±1)°C to investigate the effects of urea ammonia pretreatment on the batch anaerobic fermentation efficiency of corn stovers. This study assessed the effects of urea ammonia contents (2%, 4%, and 6%) and moisture contents (30%, 50%, 70% and 90%) on the physical structures of lignocelluloses and the efficiency of biogas production from anaerobic fermentation of corn stovers. The results indicated that the methane production reached 230.31 mL/g VS (volatile solids) at pretreatment with 4% urea ammonia and 70% moisture contents for the batch anaerobic fermentation, which was 26.6% higher than that of the untreated group. The degradation rates of cellulose and hemicellulose were 66.34% and 75.47% after the anaerobic fermentation, respectively, which were about 22.6% and 20.9% higher than that of the untreated group, respectively. Thus, it was concluded that urea ammonia pretreatment can improve the efficiency of biogas production from anaerobic fermentation of corn stovers.

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Section: Introduction mentioning

confidence: 99%

Effects of urea ammonia pretreatment on the batch anaerobic fermentation efficiency of corn stovers

Yang

Zheng

et al. 2019

International Journal of Agricultural and Biological Engineering

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“…Whole corn stalk was dried, crushed, and then pretreated with acid (2% H 2 SO 4 , and 2% HCI), alkali (2% NaOH, 2% KOH, and 2% Na 2 CO 3 ), oxidized (2% H 2 O 2 ), acid combined with oxidation (2% H 2 SO 4 and 2% H 2 O 2 , 2% HCI, and 2% H 2 O 2 ), and alkali combined with oxidation (2% NaOH and 2% H 2 O 2 , 2% KOH and 2% H 2 O 2 , 2% Na 2 CO 3 and 2% H 2 O 2 ) . The solid–liquid ratio was 1:10 (wt/vol), and pretreatment was performed for 60 min at 120°C.…”

Section: Methodsmentioning

confidence: 99%

“…Glucose and xylose kit for detecting glucose and xylose content were purchased from Shanghai Rongsheng Biological Pharmaceutical. [16][17][18]. The solid-liquid ratio was 1:10 (wt/vol), and pretreatment was performed for 60 min at 120°C.…”

Section: Methodsmentioning

confidence: 99%

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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“…114 A slight increase of cellulose and hemicellulose. 137 Exhausted olive pomace 136 Strongly removes 18% Grass clipping, 120 sugarcane bagasse, 116,140,141 corn stalks, 119,142 groundnut shells, coconut coir and pistachio shells, 117 sunn hemp, 118 wheat straw, 108 hybrid napier grass and deenanath grass, 143 rice straw, 138,144,145 Saccharum spontaneum, Lantana camara, Eichhornia crassipes and Mikania micrantha, 146 cane bagasse, 147 rapeseed hulls pulps, 148 reed, 149 rapeseed straw 122 Mainly increases cellulose content up to 96.7%. assisted NaOH for the studied feedstocks compared with that of NaOH only under the conditions of 20 kHz, 100 W, 70 min and 1 mol L −1 NaOH.…”

Section: γ-Valerolactonementioning

confidence: 99%

Cascade utilization of lignocellulosic biomass to high-value products

et al. 2019

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Dual-frequency ultrasound combined with alkali pretreatment of corn stalk for enhanced biogas production

Cited by 55 publications

References 22 publications

Effects of urea ammonia pretreatment on the batch anaerobic fermentation efficiency of corn stovers

Effects of urea ammonia pretreatment on the batch anaerobic fermentation efficiency of corn stovers

Ethanol production by simultaneous saccharification and cofermentation of pretreated corn stalk

Cascade utilization of lignocellulosic biomass to high-value products

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