Improved Buffering Capacity and Methane Production by Anaerobic Co-Digestion of Corn Stalk and Straw Depolymerization Wastewater

Yang, Feifei; Li, Wenzhe; Sun, Mingchao; Li, Qiang; Wang, Mengyi; Sun, Yong

doi:10.3390/en11071751

Cited by 18 publications

(8 citation statements)

References 36 publications

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“…The lag phase (λ) of five VCRs was within the range of 0-1.109 days. Yang et al reported a longer lag phase (0.7-35.7 days) for codigestion of corn stalk and straw depolymerization wastewater [35]. Theoretically, the inoculum activity, the amount of readily degradable components in the substrate, and the initial pH of the inffluent have a marked impact on the AD start-up time [18].…”

Section: Results Of Linear Regression Analysismentioning

confidence: 99%

Evaluation of Biochemical Methane Potential and Kinetics on the Anaerobic Digestion of Vegetable Crop Residues

Sun

et al. 2018

Energies

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There is a lack of literature reporting the measurement and prediction of biochemical methane potential (BMP) of vegetable crop residues (VCRs) and similarly, the kinetic assessment on the anaerobic digestion process of VCR is rarely investigated. In this paper, the BMP tests of five different vegetable (snap bean, capsicum, cucumber, eggplant, and tomato) crop residues were conducted at feed to inoculum ratio (F/I) of 2.0 under mesophilic (36 ± 1 °C) conditions. A series of single-variable and multiple-variable regression models were built based on organic components (hemicellulose, cellulose, lignin, total fat, total sugar, and crude protein) for BMP prediction. Three kinetic models, including the first-order kinetic model, the Chen and Hashimoto model, and the modified Gompertz model, were used to simulate the methane yield results of VCR and obtain valuable model parameters simultaneously. As a result, the BMPs and volatile solids (VS) degradation degree of different VCRs were respectively in the range of 94.2–146.8 mL g−1 VS and 40.4–49.9%; the regression prediction models with variables lignin (R2 = 0.704, p = 0.076), variables crude protein and lignin (R2 = 0.976, p = 0.048), and variables total fat, hemicellulose, and lignin (R2 = 0.999, p = 0.027) showed the best performance on BMP prediction among the single-factor, two-factor, and three-factor models, respectively. In addition, compared to the other two kinetic models, the modified Gompertz model could be excellently fitted (R2 = 0.986–0.998) to the results of BMP experiment, verification deviations within 0.3%.

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Section: Results Of Linear Regression Analysismentioning

confidence: 99%

Evaluation of Biochemical Methane Potential and Kinetics on the Anaerobic Digestion of Vegetable Crop Residues

Sun

et al. 2018

Energies

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“…Anaerobic fermentation is widely utilized in treating corn stovers because it can produce bioenergy and organic fertilizer, meanwhile reducing environmental pollution [3] . However, corn stovers consist of polysaccharides (such as cellulose, hemicellulose and lignin), which form complex structures, consequently resulting in reduced availability of these carbohydrates for enzymatic hydrolysis and subsequent microbial conversion [4] .…”

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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“…Furthermore, pH also plays an important role in the methanation process. And with the proper buffering system optimized pH can be achieved (Gupta and Gupta 2014;Yang et al, 2018). KH 2 PO 4 and NaHCO 3 were considered as the chief components in maintaining the pH of the medium (Eduok et al, 2018).…”

Section: Discussionmentioning

confidence: 99%

An Operative Laboratory Investigation of Bioconversion Route From Waste Coal to Natural Energy

Basera

Lavania

shinde

et al. 2021

Preprint

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Purpose: In the present research, the potential of reactivated consortium for the methane production consuming waste coal as a carbon source (1% w/v) in the modified media at mesophilic temperature (37°C) was determined. Methods: Media modification was conducted for the enhancement of methane production by selecting three different components from the two media i.e. Methanosprillium sp producing media (MSP) and Methane producing bacteria media (MPB). From MSP medium; C2H2NaO2 (sodium acetate), KH2PO4 (potassium dihydrogen the phosphate) and NaHCO3 (sodium bicarbonate) whereas from MPB medium; yeast extract, peptone, and NH4Cl (ammonium chloride) were selected in the range of 0.5-2.5 (g/l). Analytical assay i.e Fourier Transform Infrared Spectroscopy (FTIR) and Gas Chromatography Mass Spectrophotometry (GCMS) and Scanning electron microscopy (SEM) were conducted. Further, compatibility study and pathogenicity was performed.Results: In the present study reactivated consortia was used therefore key components of the media were modified. In case of MPB medium: 2g/l of yeast extract, 2g/l peptone and 1 g/l NH4Cl showed the promising results. Whereas, for MSP medium: 1 g/l of KH2PO4, 0.5 g/l of NaHCO3 and 1.5 g/l of C2H2NaO2 were noted to be the suitable range for methane production. Analytical studies confirmed the presences of -OH and aliphatic groups which majorly belongs to alkane, alkene, and phenol derivatives compounds whereas Scanning electron microscopy (SEM) studies delineated the active interaction of bacteria with coal particles. In addition, a compatibility study was performed and their successful results aid in the future approach of field implementation. Further, pathogenicity data indicated the non-virulent and non-toxic nature of the consortia. Conclusions: Production of waste coal is one of the most problematic and common activities of the mining industry. They release toxic substances into the environment (water, air, and soil) and damage the local biodiversity. Therefore, the generation of biogenic methane from waste coal is an environmentally friendly approach to overcome this problem.

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Improved Buffering Capacity and Methane Production by Anaerobic Co-Digestion of Corn Stalk and Straw Depolymerization Wastewater

Cited by 18 publications

References 36 publications

Evaluation of Biochemical Methane Potential and Kinetics on the Anaerobic Digestion of Vegetable Crop Residues

Evaluation of Biochemical Methane Potential and Kinetics on the Anaerobic Digestion of Vegetable Crop Residues

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

An Operative Laboratory Investigation of Bioconversion Route From Waste Coal to Natural Energy

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