Characteristics of Substrates Used for Biogas Production in Terms of Water Content

Czekała, Wojciech; Nowak, Mateusz; Bojarski, Wiktor

doi:10.3390/fermentation9050449

Cited by 9 publications

(3 citation statements)

References 100 publications

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“…In addition, it was shown in the work that already as a result of significant losses, primarily from nitrogen compounds, the composition of the digestate may be richer in these nutrients [136][137][138].…”

Section: Discussionmentioning

confidence: 99%

The Impact of Manure Use for Energy Purposes on the Economic Balance of a Dairy Farm

Mazurkiewicz

2023

Energies

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The use of methane fermentation in mesophilic conditions for the energy use of cow manure and additional co-substrates from the farm can bring a small dairy farm (140 dairy cows) financial benefits of up to EUR 114,159 per year. Taking into account the need to pay for emissions calculated as carbon dioxide equivalent, this profit could be reduced to EUR 81,323 per year. With the traditional direct use of manure, this profit would drop by as much as 60% to the level of EUR 33,944 per year. Therefore, the introduction of fees for emissions may significantly burden current dairy farms. As has already been shown, just compacting and covering the manure (which costs approx. EUR 2000 per year for 140 cows) would give almost twice as much profit—EUR 64,509 per year. Although an investment in a small biogas plant with a cogeneration unit on a family dairy farm may have a payback period of less than 6.5 years and a return of capital employed of 16%, most small farms in the world will not be able to afford its construction without external subsidies. At the same time, it would make it possible to reduce emissions by almost 270 times—from 41,460 to 154 tons of CO2eq per year—and the possibility of preserving valuable nutrients and minerals and supporting soil properties in the digestate. Therefore, it seems necessary for Europe to introduce a support system for small- and medium-sized farms with this type of investment in the near future in a much larger form than it has been so far.

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Section: Discussionmentioning

confidence: 99%

The Impact of Manure Use for Energy Purposes on the Economic Balance of a Dairy Farm

Mazurkiewicz

2023

Energies

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“…Another solution that brings measurable profits is the construction of a local biogas plant with a capacity of 250-500 kW and use of other waste streams [76,[120][121][122][123]. In the analyzed case, it would be an installation intended for a dozen local farmers (up to 10 km from the installation) and waste streams other than manure.…”

Section: Discussionmentioning

confidence: 99%

Loss of Energy and Economic Potential of a Biogas Plant Fed with Cow Manure due to Storage Time

Mazurkiewicz

2023

Energies

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The aim of the publication was to analyze investments in biogas plants with a cogeneration unit for an average size dairy farm. The basis for the calculation was the use of cow manure as the only substrate in methane fermentation. The economic balance also includes ecological and service aspects. The study also shows how much energy and quality potential is lost due to improper manure management and what impact a single farm with dairy cows has on the emission of carbon dioxide equivalent. It has been estimated that as a result of improper storage of manure, even 2/3 of its fertilizing, energy and economic value can be lost, while causing damage to the environment. It has been estimated that for a single farm with 100 cows, without government mechanisms subsidizing investments in RES, the payback period exceeds 15 years, and the Return of Capital Employed is slightly more than 6%.

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“…Biogas composition including methane, carbon dioxide, and hydrogen sulphide are demonstrated in Figure 2a-c, respectively. Methane and carbon dioxide have a major portion in biogas mixture, and the other components are present in small amounts depending on substrate characteristics, as Czekała et al [58] reported substrates with higher portions of carbohydrate and protein have a high hydrolysis rate, but substrates with fat have a comparatively high methane content in biogas. Methane contents of biogas produced from 100:0, 90:10, 70:30, 50:50, 30:70, 10:90, and 0:100 test groups were 52.78%, 51.80%, 51.68%, 51.76%, 51.25%, 51.15%, and 51.61%, respectively (Figure 2c).…”

Section: Analysis Of Biogas Compositionmentioning

confidence: 99%

Co-Digestion-Based Circular Bio-Economy to Improve Biomethane Generation and Production of Nutrient-Enriched Digestate in Bangladesh

Saha,

Khatun,

Nime

et al. 2023

Sustainability

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Anaerobic co-digestion (ACoD) of cow dung (CD) and maize cob (MC) may be envisaged as the best way to enhance biomethane formation and production of nutrient-enriched fertilizer for the implementation of a circular bio-economic system. The study aimed to find out the optimum ratio for the highest biogas production to produce heat and energy and also the generation of nutrient-enriched organic fertilizer to use in crop land. A batch study was carried out for 99 days in an incubator maintaining 35 ± 1 °C temperature for seven different test groups of CD and MC (100:0, 90:10, 70:30, 50:50, 30:70, 10:90, and 0:100). The highest biogas production (356.6 ± 21.2 mL/gVS) was at 50:50 ratio with 138.05% and 32.02% increments compared to the digestion of CD and MC alone, respectively. Kinetic modeling showed the best fit using a Logistic model to evaluate ACoD of CD and MC mathematically. ACoD of available CD and MC in Bangladesh could produce 716.63 GWh/yr electricity for consumption and a large volume of nitrogen-enriched fertilizer to use in nitrogen-deficit soil. There was no significant difference in nutrient enrichment among different test groups. Awareness about ACoD technology and proper use of digestate might bring this technology to field-level utilization and thus help to implement the circular bio-economic concept through zero waste generation.

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Characteristics of Substrates Used for Biogas Production in Terms of Water Content

Cited by 9 publications

References 100 publications

The Impact of Manure Use for Energy Purposes on the Economic Balance of a Dairy Farm

The Impact of Manure Use for Energy Purposes on the Economic Balance of a Dairy Farm

Loss of Energy and Economic Potential of a Biogas Plant Fed with Cow Manure due to Storage Time

Co-Digestion-Based Circular Bio-Economy to Improve Biomethane Generation and Production of Nutrient-Enriched Digestate in Bangladesh

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