Influence of Aerobic Pretreatment of Poultry Manure on the Biogas Production Process

Rubežius, Mantas; Venslauskas, Kęstutis; Navickas, Kęstutis; Bleizgys, Rolandas

doi:10.3390/pr8091109

Cited by 9 publications

(5 citation statements)

References 50 publications

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“…However, research data confirm our findings on the potential to reduce organic content in the liquid phase through aerobic treatment. For instance, aerobic treatment of poultry manure for 14 days resulted in a 2.01% reduction in total organic carbon (Rubežius et al 2020). Additionally, cyanobacteria have been reported to reduce the weight of kitchen waste by 40 % (Gill et al 2014).…”

Section: Resultsmentioning

confidence: 99%

The effect of fermentation modes on the efficiency of organic waste treatment in batch bioreactors

Hovorukha

2024

Archives of Environmental Protection

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The amount of solid organic waste is constantly growing. This is caused by the growth of industrial and agricultural capacities, and the inefficiency of existing waste processing technologies. Biotechnologies can provide effective environmentally friendly solutions for waste treatment. Therefore, the goal of our work was to compare the efficiency of strictly anaerobic fermentation of multi-component solid organic waste with hydrogen synthesis and waste treatment with pulsed air access in batch bioreactors.During fermentation, the following parameters were controlled: pH, redox potential (Eh), concentration of dissolved organics, and the content of H2, O2, and CO2 in the gas phase. The efficiency was evaluated via the process duration, calculation of the ratio of the initial and final weight of waste (Кd), and the yield of molecular hydrogen. Obtained results revealed high efficiency of organic waste degradation in both variants. The weight of waste 83-fold and 86-fold decreased, respectively. The time required for fermentation in strictly anaerobic conditions was 4 days, whereas 7 days were required for the mode with pulsed air access. The first variant provided a 2.8-fold higher hydrogen yield (54±4,1 L/kg of waste), and the second one provided a decrease in the concentration of dissolved organic compounds in the fermentation fluid. Fermentation is the effective approach for accelerated degradation of solid organic waste. Strictly anaerobic fermentation appeared to be useful in the need to accelerate the process. The mode with the pulsed air access can provide not only degradation of solid waste but also purification of the fermentation fluid.

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Section: Resultsmentioning

confidence: 99%

The effect of fermentation modes on the efficiency of organic waste treatment in batch bioreactors

Hovorukha

2024

Archives of Environmental Protection

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“…The methane yield (M fm ) obtained from the feedstock mass and the specific methane yield (M vs ) obtained from the feedstock volatile solids, as well as the biogas energy value (E BG ), were calculated by the equations reported in [39].…”

Section: Determination Of Biogas Yield and Energy Value Of Feedstockmentioning

confidence: 99%

Processing of Agricultural Residues with a High Concentration of Structural Carbohydrates into Biogas Using Selective Biological Products

Venslauskas,

Navickas,

Rubežius

et al. 2024

Sustainability

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Biomass, particularly agricultural residues and biomass rich in structural carbohydrates, offers significant potential for sustainable biogas production. Biological pretreatment using microorganisms, particularly Trichoderma species, is discussed as a cost-effective and environmentally sustainable approach to improving the decomposition of structural carbohydrates into fermentable sugars. This study aimed to assess the impact of employing a selective biological product (BP) on the biogas production process and biomethane potential using winter wheat straw (WWS) as a representative feedstock. The biological product, consisting of microorganisms of the Trichoderma spp. genus, was introduced to enhance microbial activity. The biogas potential results showed that WWS treated with the BP exhibited a remarkable improvement in biogas production. Specifically, biogas yield increased from 364.1 L/kg of mass in untreated straw to 439.9 L/kg in BP-treated straw, representing a substantial 20.8% increase. Furthermore, in continuous loading tests, the steady-state biogas yield from BP-treated straw ranged from 553.6 to 582.0 L/kg VS, which was notably higher compared to untreated straw with a yield of 490.0 L/kg VS. Overall, the results of this study demonstrated that the application of selective biological products significantly enhanced biogas production and biomethane potential from structural carbohydrates containing biomass sources.

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“…The influence of feedstock pretreatment for anaerobic digestion was evaluated using the following indicators: intensity of biogas production, biogas yield from raw and pretreated feedstock (B M ), biogas yield from raw and pretreated feedstock total solids (B TS ), biogas yield from raw and pretreated feedstock volatile solids (B VS ) and energy value from raw and pretreated feedstock obtained at anaerobic conversion (e M ). The calculations were made using the following equations [19]…”

Section: Anaerobic Digestion Processmentioning

confidence: 99%

“…Currently, the fixation and conversion of carbon dioxide (CO 2 ) is an emerging area of interest [16]. Various technologies for raw biomass feedstock pretreatment, such as thermal [17], chemical [18], biological [19] and physical [20] are available. The production of biomethane from biogas always involves the formation of CO 2 as a by-product, which ranges from 15 to 60% of the amount of biomethane produced [21].…”

Section: Introductionmentioning

confidence: 99%

The Influence of CO2 Injection into Manure as a Pretreatment Method for Increased Biogas Production

et al. 2023

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Manure is considered a by-product or organic waste in cattle, pig, chicken or other animal breeding farms, which can be a valuable product as compost or feedstock for biogas production. The production of biomethane from biogas always copes with the formation of carbon dioxide (CO2) as a by-product. This CO2 may be recycled through the feedstock as a pretreatment to maximize homogeneity, and improve biogas yield and biogas quality. The CO2-pretreatment process of cow manure (CoM), chicken manure (ChM) and pig manure (PM) was performed in the continuously fed agitated reactor at 25 °C temperature and ambient barometric pressure. Biogas yield and composition exploration were performed in an anaerobic continuous feeding digester with controlled mesophilic (37 °C) environmental conditions. The CO2 pretreated PM, CoM and ChM yielded 234.62 ± 10.93 L/kgVS, 82.01 ± 3.19 L/kgVS and 374.53 ± 9.27 L/kgVS biomethane from feedstock volatile solids, respectively. The biomethane yield from CO2 pretreated CoM, ChM and PM achieved was higher over untreated manure by +33.78%, +28.76% and +21.78%, respectively. The anaerobic digestion process of tested feedstocks was stable, and the pH of the substrate was kept steady at a pH of CoM 7.77 ± 0.02, PM 8.07 ± 0.02 and ChM 8.09 ± 0.02 during all the experiment. The oxidation-reduction potential after pretreatment was within the optimal range (−255 ± 39.0 to −391 ± 16.8 mV) for anaerobic digestion. This process also had a positive effect on the energy generated from the feedstock, with ChM showing the greatest increase, from 2.38 MJ/kg to 3.06 MJ/kg.

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Influence of Aerobic Pretreatment of Poultry Manure on the Biogas Production Process

Cited by 9 publications

References 50 publications

The effect of fermentation modes on the efficiency of organic waste treatment in batch bioreactors

The effect of fermentation modes on the efficiency of organic waste treatment in batch bioreactors

Processing of Agricultural Residues with a High Concentration of Structural Carbohydrates into Biogas Using Selective Biological Products

The Influence of CO2 Injection into Manure as a Pretreatment Method for Increased Biogas Production

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