Anaerobic digestion of ammonia-pretreated corn stover

Yuan, Hairong; Li, Rongping; Zhang, Yatian; Li, Xiujin; Liu, Chunmei; Meng, Ying; Lin, Meina; Yang, Ziyi

doi:10.1016/j.biosystemseng.2014.09.010

Cited by 40 publications

(12 citation statements)

References 12 publications

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“…The conversion of the volatile solid content of lignocellulosic biomass during AD can be illustrated through the vs. removal rate. It can also be used to compare the efficiency of different pretreatment conditions [ 12 ]. These vs. components are used by hydrolytic fermentation and methanogenesis microbes to form intercellular substances and produce biomethane.…”

Section: Resultsmentioning

confidence: 99%

“…Although this improvement is a trade-off, as KOH is expensive and unsuitable for all industrial applications. Yuan et al [ 12 ] stated that ammonia pretreatment could swell and destroy the lignocellulose structure, improving biomethane production. However, ammonia emits a particularly pungent smell and presents challenges for transportation, storage and application of the weak base.…”

Section: Introductionmentioning

confidence: 99%

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Biomethane Yield, Physicochemical Structures, and Microbial Community Characteristics of Corn Stover Pretreated by Urea Combined with Mild Temperature Hydrotherm

et al. 2021

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The corn stover (CS)’s compact structure makes it challenging for microorganisms to use in anaerobic digestion (AD). Therefore, improving CS biodegradability has become a key focus in AD studies. Methods are being targeted at the pretreatment of CS, combining advanced urea with mild temperature hydrotherm pretreatment to study its effect on promoting the AD process of CS. The biomethane yield, physicochemical structure, and microbial community characteristics were investigated. CS samples were assigned into groups differed by a range of pretreatment times (from 24 to 96 h) and set at a temperature of 50 °C with a 2% urea addition. Results revealed that the 72-h group obtained the highest biomethane yield of 205 mL/g VS−1, volatile solid (VS) and total solid (TS) removal rates of 69.3% and 47.7%, which were 36.7%, 25.3% and 27.5% higher than those of untreated one, respectively. After conducting several analyses, results confirmed the pretreatment as a method for altering CS microstructures benefits biomethane production. The most resounding differences between pretreated and untreated groups were observed within a microbial community, an integral factor for improved AD performance. This study serves to confirm that this specific pretreatment is an effective method for enhancing biomethane production in CS.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Biomethane Yield, Physicochemical Structures, and Microbial Community Characteristics of Corn Stover Pretreated by Urea Combined with Mild Temperature Hydrotherm

et al. 2021

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“…The AD time required to convert the optimum amount of raw material reflects the efficiency of the process, and shortening of AD time can efficiently lower the cost of operation and enhance productivity. T90 [25] digestion time is defined as the time required to produce 90% of the maximum biogas production. In this study, the time needed to produce 70% and 90% of maximum biogas production is shown in Table 4.…”

Section: Ad Timementioning

confidence: 99%

Anaerobic co-digestion of sodium hydroxide pretreated sugarcane leaves with pig manure and dairy manure

Luo

Meng

Yao

et al. 2018

International Journal of Agricultural and Biological Engineering

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Sugarcane leaves (SL) pretreated by alkali was used as substrate to enhance biogas production via mesophilic anaerobic digestion (AD) in this study. Effectiveness of different concentrations of NaOH pretreatment on AD performance was investigated. Results showed that compared to untreated sample of SL, the lignocellulose (LCH) content of NaOH pretreated group was decreased by 5.79%-16.85%. However, the cumulative biogas production of the pretreated samples increased in the range of 34.54%-82.67%; moreover, T90 was shorten by 5-7 d. The highest anaerobic digestibility of SL was achieved at 6% NaOH pretreatment, which produced 287.30 mL/g TS of biogas. A significant interactive effect of the three parameters (temperature, SL/manure mixing ratio and C/N ratio) was found on the biogasification of anaerobic co-digestion, and a maximum biogas production was achieved at 36.2 o C, mixing ratio of 1.6 and C/N ratio of 29.2. These show that the verification experiment confirmed the optimization results. This study provides meaningful insight for exploring efficient pretreatment strategy and optimal condition to stabilize and enhance AD performance for practical application.

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“…China has a long history of using anaerobic digestion technology to recycle agricultural waste and produce biogas since the 1970s [ 16 ]. In 2014, over 41.5 million household digesters and 99,957 biogas plants were in operation, producing 15.8 billion m 3 of biogas, equal to 18.68 million tons of standard coal [ 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

“…Solid residues (or digestates) from straw and ruminant manures are rich in cellulose, widely reused as poultry litter, composting, hydrothermal carbonization, solid fuel and fertilizer for direct application to soil, but few studies have focused on recycling it in biofilm fabrication [ 20 ]. During the anaerobic digestion of a lignocellulosic biomass, most of lignin and hemicellulose are gradually degraded to small fragments; therefore, cellulose is released from the cover of lignin, as well as the removal of the amorphous region of cellulose [ 16 ]. A solid digestate can therefore be regarded as an excellent additive to improve the performance of the biofilm.…”

Section: Introductionmentioning

confidence: 99%

Upgrading Solid Digestate from Anaerobic Digestion of Agricultural Waste as Performance Enhancer for Starch-Based Mulching Biofilm

et al. 2021

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Developing a green and sustainable method to upgrade biogas wastes into high value-added products is attracting more and more public attention. The application of solid residues as a performance enhancer in the manufacture of biofilms is a prospective way to replace conventional plastic based on fossil fuel. In this work, solid digestates from the anaerobic digestion of agricultural wastes, such as straw, cattle and chicken manures, were pretreated by an ultrasonic thermo-alkaline treatment to remove the nonfunctional compositions and then incorporated in plasticized starch paste to prepare mulching biofilms by the solution casting method. The results indicated that solid digestate particles dispersed homogenously in the starch matrix and gradually aggregated under the action of a hydrogen bond, leading to a transformation of the composites to a high crystalline structure. Consequently, the composite biofilm showed a higher tensile strength, elastic modulus, glass transition temperature and degradation temperature compared to the pure starch-based film. The light, water and GHG (greenhouse gas) barrier properties of the biofilm were also reinforced by the addition of solid digestates, performing well in sustaining the soil quality and minimizing N2O or CH4 emissions. As such, recycling solid digestates into a biodegradable plastic substitute not only creates a new business opportunity by producing high-performance biofilms but also reduces the environmental risk caused by biogas waste and plastics pollution.

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Anaerobic digestion of ammonia-pretreated corn stover

Cited by 40 publications

References 12 publications

Biomethane Yield, Physicochemical Structures, and Microbial Community Characteristics of Corn Stover Pretreated by Urea Combined with Mild Temperature Hydrotherm

Biomethane Yield, Physicochemical Structures, and Microbial Community Characteristics of Corn Stover Pretreated by Urea Combined with Mild Temperature Hydrotherm

Anaerobic co-digestion of sodium hydroxide pretreated sugarcane leaves with pig manure and dairy manure

Upgrading Solid Digestate from Anaerobic Digestion of Agricultural Waste as Performance Enhancer for Starch-Based Mulching Biofilm

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