Two-phase anaerobic digestion of vegetable market waste fraction of municipal solid waste and development of improved technology for phase separation in two-phase reactor

Majhi, Bijoy Kumar; Jash, Tushar

doi:10.1016/j.wasman.2016.09.009

Cited by 26 publications

(9 citation statements)

References 20 publications

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“…Similar values were found in previous studies in which glycerol was not used, 8 in keeping with those obtained in the anaerobic digestion of organic waste 38 and the codigestion of mixtures of slaughterhouse waste with MSW 39 and vegetable market waste with MSW. 40 Decomposition of SCOD was in the 65− 73% range. These results are in line with those obtained by Ueno 41 (79%) in two-phase thermophilic AD of organic waste for an HRT between 4.3 and 6.8 d (OLR between 12.4 and 16.6 g SCOD/L/d).…”

Section: Resultsmentioning

confidence: 98%

Bioenergy Generation from Municipal Solid Waste and Glycerin Waste: Population Dynamics

et al. 2017

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This paper studies the microbial community, effluent characteristics, and bioenergy generation (hydrogen and methane production) in a two-phase dry-thermophilic (55 °C) anaerobic codigestion process treating actual municipal solid waste (20% solid content) and biodiesel waste (glycerin waste, 1% v/v). Four different hydraulic retention times (from 11.5 to 4.5 d) and four organic loading rates (from 8.2 to 21.1 g VS/L/d) were studied to identify optimal conditions (maximum values of biogas and microbial activity). Optimal conditions (2.6 ± 0.3 L H 2 /L/d, 3.4 ± 0.3 L CH 4 /L/d, and 109 ± 9 × 10 −13 L CH 4 / cell/d) were obtained at 5.9 d HRT. Fermentation end products yield propionic acid as the major product in the secondary effluent. The average values of the ratios of Eubacteria/Archaea and acetogens/hydrolytic-acidogenic bacteria were respectively 83:17 and 30:53 in the first phase (1.5 d HRT) and 76:24 and 39:37 in the second phase (4.4 d HRT).

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Section: Resultsmentioning

confidence: 98%

Bioenergy Generation from Municipal Solid Waste and Glycerin Waste: Population Dynamics

et al. 2017

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“…This result indicates that AD was carried out under the synergistic action of microorganisms and various organic ingredients in the substrates, namely, the BMP results are simultaneously affected to varying degrees by all organic constituents of the substrate rather than being affected by only one component. Considering the R 2 and p values, the model with the combination of two explanatory variables of CP and Lig showed the best performance (R 2 = 0.976 and p = 0.048) among the two-variable models, namely, CP and Lig explained 97.6% of variation in G 0 . Similarly, in all the three-variable regression models, the highest R 2 value (0.999) was obtained when TF, Hem, and Lig were used in combination.…”

Section: Results Of Linear Regression Analysismentioning

confidence: 99%

“…In recent years, attributable to the vigorous implementation of the "vegetable basket project" by local governments at various levels, the vegetable industry has developed rapidly and prosperously in China [1]. Vegetable crop residues (VCRs), including stalks, leaves, vines, and roots of plants, refer to the parts of the vegetable crop that remain after obtaining the main agricultural products [2,3]. In 2016, the total output of VCR in China was approximately 40 million tons that were mainly generated during the harvest of vegetable fruits and the renovation of greenhouses [4][5][6].…”

Section: Introductionmentioning

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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“…8 Finally, methanogens produce CO 2 , methane, and ATP from acetic acid, CO 2 , and H 2 through methanogenesis along with many important coenzymes, such as methanofuran, methanopterin, and coenzyme M. 8 In the past 20 years, more and more countries have focused on the industrial applications of the AD technique and constructed hundreds of AD treatment facilities to degrade organic matter, such as municipal, agricultural, and industrial wastes. 9 Meanwhile, many studies related to methane production from different substrates, 10,11 methane production enhancement, 12,13 and reactor design 14,15 in AD have made great progress. The rapid development of AD technology has facilitated the utilization of renewable resources and promoted the optimization of energy structures.…”

Section: Introductionmentioning

confidence: 99%

Anaerobic digestion as a laboratory experiment for undergraduate biochemistry courses

Shen

Chen

2020

Biochem Molecular Bio Educ

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Compared to aerobic catabolism, the theories and experiments of anaerobic catabolism are not covered in depth in biochemistry education curricula. Anaerobic digestion (AD) is a feasible method for converting common organic compounds to renewable energy‐methane that has drawn a great deal of attention in practical applications. In this study, we designed an AD laboratory experiment for use in undergraduate biochemistry courses to supplement the knowledge of metabolic networks in biochemistry and extend the information presented in biochemistry textbooks. In this laboratory experiment, students explored the methane production performance of wheat straw (WS; a representative and commonly available agricultural waste) and mastered a reasonable method for utilizing this new biochemical reaction to convert organic wastes from renewable resources to methane. Basic experimental procedures, such as a biochemical methane potential (BMP) assay, data analysis, and graphic presentations were organized to provide students with abundant hands‐on experience. Furthermore, calculations of significant parameters, such as total solids (TS), volatile solids (VS), experimental methane yield (EMY), maximum theoretical methane production (MMP), and biodegradability (BD), were also performed. From this AD experiment, students learned not only a new series of biochemical reactions but also a novel strategy to achieve cleaner methane production from organic wastes, exhibiting a positive impact for students' learning in biochemistry course.

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Two-phase anaerobic digestion of vegetable market waste fraction of municipal solid waste and development of improved technology for phase separation in two-phase reactor

Cited by 26 publications

References 20 publications

Bioenergy Generation from Municipal Solid Waste and Glycerin Waste: Population Dynamics

Bioenergy Generation from Municipal Solid Waste and Glycerin Waste: Population Dynamics

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

Anaerobic digestion as a laboratory experiment for undergraduate biochemistry courses

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