Improvement of Anaerobic Digestion of Hydrolysed Corncob Waste by Organosolv Pretreatment for Biogas Production

This paper describes an organosolv pretreatment of corncob waste to improve its anaerobic digestion for biogas production. Through a thermochemical process based on the use of ethanol and acetic acid, it was possible to separate the fractions of lignin, considered to be a natural inhibitor of anaerobic digestion processes. In addition, with this organosolv pretreatment, the available sugars in the carbohydrates present as monosaccharides, or simple sugars, were depolymerised, facilitating the digestion process. The obtained results include the chemical characterisation of the corncob, the hydrolysate, and the mixture with cow manure, finding that these substrates have potential to be used in anaerobic digestion. The total reducing sugars consumed were 96.8%, and total sugars were 85.75%. It was clearly observed that with the use of pretreatment with organosolv, the production of biogas was superior, because 484 NmL/gVS was obtained compared to the other reported treatments. It was also observed that adding the hydrolysate organosolv increased the production because the values of the control without hydrolysate were 120 NmL/gVS in the bottle experiment. When the experiment was scaled to the 5L reactor, the total volumes of biogas that were accumulated in 15 days of production were 5050 NmL/gVS and 1212 NmL/gVS with and without hydrolysate, respectively. This indicates that the organosolv pretreatment of corncob waste is effective in improving biogas production.

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Direct interspecies electron transfer performance through nanoparticles (NPs) for biogas production in the anaerobic digestion process

International Journal of Environmental Science and Technology ◽

10.1007/s13762-021-03664-w ◽

2021 ◽

Author(s):

P. Jadhav ◽

M. Nasrullah ◽

A. W. Zularisam ◽

P. Bhuyar ◽

S. Krishnan ◽

...

Keyword(s):

Electron Transfer ◽

Anaerobic Digestion ◽

Biogas Production ◽

Transfer Performance ◽

Anaerobic Digestion Process ◽

Digestion Process ◽

Direct Interspecies Electron Transfer ◽

Interspecies Electron Transfer

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Study of thermal hydrolysis as a pretreatment to mesophilic anaerobic digestion of pig slurry

Water Science & Technology ◽

10.2166/wst.2001.0193 ◽

2001 ◽

Vol 44 (4) ◽

pp. 109-116 ◽

Cited By ~ 62

Author(s):

A. Bonmatí ◽

X. Flotats ◽

L. Mateu ◽

E. Campos

Keyword(s):

Anaerobic Digestion ◽

Biogas Production ◽

Limiting Factor ◽

Pig Slurry ◽

Thermal Hydrolysis ◽

Organic Matter Degradation ◽

Thermal Pretreatment ◽

Digestion Process ◽

Degradation Tests ◽

Thermal Phenomena

Feasibility of anaerobic digestion of pig slurry is dependent, among other factors, on the biogas production rate, which is low compared with other organic wastes, and on the profitable uses of surplus thermal energy produced, a limiting factor in warm geographical areas. The objectives of this work are determining whether low temperature thermal pretreatment (<90°C) improves pig slurry anaerobic digestion, and determining whether organic matter degradation during the thermal pretreatment is due to thermal phenomena (80°C) or to enzymatic ones (60°C). The thermal degradation tests showed that hydrolysis occurring during the thermal pretreatment is due to thermal phenomena. The increase in soluble substances were significantly larger at 80°C than at 60°C (both during 3 h). Two types of slurry were used in the batch anaerobic digestion tests. The effect of thermal pretreatment differed with the type of slurry: it was positive with almost non-degraded slurries containing low NH4+-N concentration, and negative (inhibition of the anaerobic digestion process) when using degraded slurries with high NH4+-N content.

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Operational Parameters of Biogas Plants: A Review and Evaluation Study

Energies ◽

10.3390/en13153761 ◽

2020 ◽

Vol 13 (15) ◽

pp. 3761 ◽

Cited By ~ 5

Author(s):

Abdullah Nsair ◽

Senem Onen Cinar ◽

Ayah Alassali ◽

Hani Abu Qdais ◽

Kerstin Kuchta

Keyword(s):

Anaerobic Digestion ◽

Review Paper ◽

Biogas Production ◽

Evaluation Study ◽

Biogas Plant ◽

Operational Parameters ◽

Digestion Process ◽

Design Considerations ◽

Biogas Plants ◽

Main Factors

The biogas production technology has improved over the last years for the aim of reducing the costs of the process, increasing the biogas yields, and minimizing the greenhouse gas emissions. To obtain a stable and efficient biogas production, there are several design considerations and operational parameters to be taken into account. Besides, adapting the process to unanticipated conditions can be achieved by adequate monitoring of various operational parameters. This paper reviews the research that has been conducted over the last years. This review paper summarizes the developments in biogas design and operation, while highlighting the main factors that affect the efficiency of the anaerobic digestion process. The study’s outcomes revealed that the optimum operational values of the main parameters may vary from one biogas plant to another. Additionally, the negative conditions that should be avoided while operating a biogas plant were identified.

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Total Diet Study: Carbohydrate Content and Methodology

Journal of AOAC INTERNATIONAL ◽

10.1093/jaoac/47.5.823 ◽

1964 ◽

Vol 47 (5) ◽

pp. 823-826

Author(s):

James F Eheart ◽

Blanche S Mason

Keyword(s):

Reducing Sugars ◽

Starch Content ◽

The Other ◽

Total Sugars ◽

Total Diet Study ◽

Factor Effect ◽

Total Diet ◽

Extreme Variability ◽

Diet Study ◽

Positive Correlations

Abstract Determinations were made of total and reducing sugars, sucrose, dextrin, and starch content of dry fat-free solids of the "total diet" samples previously reported by Food and Drug Administration. Samples represented differences in season, location, time of purchase, and store at which purchased. Mean dry fat-free solids contents did not differ significantly. Purchase periods and locations caused extreme variability of the sucrose content of the diets. Factor- effect variations among the other carbohydrate constituents were not considered nutritionally important. Reducing sugars, sucrose, and starch gave positive correlations with total sugars, while negative correlations were obtained for total sugars with dextrin and for reducing sugars with sucrose.

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Improved ADM1 for modelling C, N, P fates in anaerobic digestion process of pig manure and optimization approaches to biogas production

Renewable Energy ◽

10.1016/j.renene.2019.08.086 ◽

2020 ◽

Vol 146 ◽

pp. 2330-2336 ◽

Cited By ~ 4

Author(s):

Heng Li ◽

Zheng Chen ◽

Dun Fu ◽

Yuanpeng Wang ◽

Yanmei Zheng ◽

...

Keyword(s):

Anaerobic Digestion ◽

Biogas Production ◽

Pig Manure ◽

Anaerobic Digestion Process ◽

Digestion Process

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Degradation of veterinary antibiotics during anaerobic digestion of dairy manure

Water Practice & Technology ◽

10.2166/wpt.2015.061 ◽

2015 ◽

Vol 10 (3) ◽

pp. 532-537 ◽

Cited By ~ 3

Author(s):

Yumika Kitazono ◽

Ikko Ihara ◽

Kiyohiko Toyoda ◽

Kazutaka Umetsu

Keyword(s):

Anaerobic Digestion ◽

Biogas Production ◽

Dairy Manure ◽

Antibiotic Residues ◽

Veterinary Antibiotics ◽

Livestock Manure ◽

Anaerobic Digestion Process ◽

Digestion Process ◽

Antibiotic Degradation

This study evaluated antibiotic degradation and biogas production during anaerobic digestion of dairy manure contained two common veterinary antibiotics at 37 °C. After 18 days of digestion, the concentration of chlortetracycline (CTC) decreased more than 80% regardless of the initial CTC concentration. The concentration of cefazolin (CEZ) decreased from 10 to 0.08 mg/L in 6 days. Less than 50 mg/L CTC and 10 mg/L CEZ had negligible impact on biogas production during anaerobic digestion process. The result showed that the anaerobic digestion has a potential to degrade antibiotic residues in livestock manure.

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