A comparative life cycle assessment of anaerobic mono- and co-digestion of livestock manure in Bangladesh

Hossain, Samira; Akter, Shammi; Saha, Chayan Kumer; Reza, M. Toufiq; Kabir, Kazi Bayzid; Kirtania, Kawnish

doi:10.1016/j.wasman.2022.12.011

Cited by 9 publications

(2 citation statements)

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“…The data presented in Table 9 also show that the adoption of a previous stage of PL anaerobic digestion, either combined (scenario C3) or not (scenario C2) with thermal treatment, would reduce total phosphate emissions between 98.4% and 99.1% when compared to scenario C1, where PL was disposed of in natura on the soil. This is because the inclusion of AD guarantees the production of energy (burning biogas) and biofertilizer (digestate), which, if used by the farm, would lead to avoided GHG emissions and a reduction in the potential for eutrophication (Nusselder et al, 2020;Hossain et al, 2023) when compared to scenario C1.…”

Section: Acidification and Eutrophication Potentialsmentioning

confidence: 99%

Life cycle analysis of anaerobic digestion processes of poultry litter

Carneiro,

Aquino,

Adarme

2024

Rev. Bras. Ciênc. Ambient.

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This article presents results of life-cycle assessment of anaerobic digestion processes of poultry litter (PL) preceded or not by thermal pretreatment (autohydrolysis). For this, the environmental impact categories, greenhouse gas (GHG) emissions, eutrophication, and soil acidification were evaluated using the ReCiPe Midpoint (H) method. Based on primary data provided by a partner company, life-cycle inventories were constructed for three forms of poultry waste management: i. disposal of in natura PL into the soil, which is the commonly used management technique; ii. anaerobic digestion of in natura PL; and iii. thermal pre-treatment by autohydrolysis of PL before its anaerobic digestion. It is concluded that anaerobic digestion of PL reduces GHG emissions compared to the “business as usual” scenario of soil disposal. The use of digestate (liquid fraction generated by PL anaerobic digestion) as soil fertilizer would result in avoided GHG emissions of 34%, while thermal pre-treatment by autohydrolysis of PL prior to its anaerobic digestion would result in a slightly lower reduction (27%) in GHG. Anaerobic digestion of in natura PL would also reduce the eutrophication potential by 98.2% (kg eq PO4-3/t litter) and the acidification potential by 98.4% (kg eq SO2/t litter) compared to its soil disposal. These results show that anaerobic digestion is a more sustainable way to manage PL than its environmental discharge.

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Section: Acidification and Eutrophication Potentialsmentioning

confidence: 99%

Life cycle analysis of anaerobic digestion processes of poultry litter

Carneiro,

Aquino,

Adarme

2024

Rev. Bras. Ciênc. Ambient.

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“…In the case of AD, heat and electricity cogeneration is applied, where the heat produced is used for consumption in the biogas plant and/or for other uses (e.g., greenhouse heating), while the methane is burned in an internal combustion engine, converting it into electricity [20,22]. The electricity produced is made available through a fixed line supply to the public electricity company (PPC) with an economic benefit and revenue for the biogas plant.…”

Section: Theoretical Calculation Of Thermal and Electrical Energy For...mentioning

confidence: 99%

Opportunities and Potential for Energy Utilization from Agricultural and Livestock Residues in the Region of Thessaly

et al. 2023

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In recent years, due to the circular economy, the use of green energy forms, such as biofuels and biogas from anaerobic digestion of fermentable materials (e.g., agricultural and livestock residues) has entered our lives. According to the International Energy Agency it is estimated that the needs in 2040 will be 48% higher than in 2012 so all political decisions have converged on an urgent need for the use of more and more renewable and green energy. Considering the overall economic activity of these sectors in the region of Thessaly, the aim of this study is to highlight the residues from agricultural and livestock activities in the primary sector and calculate the annual biomass production, the methane and biogas potential, the electrical and thermal energy that can be produced from these wastes, as well as the solid residue that can be used to improve the soil of the region. The study was based on data referring to the years 2015 to 2020. The production of livestock and agricultural residues, averaged over the above six-year period in the study area, was estimated at approximately 4.8 × 106 t·yr.−1, with livestock residues accounting for 83% and agricultural residues for 17%. Furthermore, the total residues can produce an average biogas potential of approximately 4.7 × 106 m3·yr.−1, while the amount of electricity that can be produced ranges from 708–1091 GWh·yr.−1, and the corresponding thermal energy from 1112–1577 GWh·yr.−1. As a result of the complete anaerobic digestion process, a solid residue could also be obtained for the improvement of the region’s soil, which translates into a quantity in the range of 4.01 × 104 to 5.10 × 104 t·yr.−1.

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