Impacts of Biogas Digestate on Crop Production and the Environment: A Bulgarian Case Study

Kathijotes, Nicholas; Petrova, Vera; Zlatareva, E.; Kolchakov, Viktor; Marinova, S.; Ivanov, P.

doi:10.3844/ajessp.2015.81.89

Cited by 10 publications

(5 citation statements)

References 6 publications

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“…The content of heavy metals was within the acceptable range, which confirms the usability of the digestate as a crop fertilizer [39,40]. It is also important to note that the elemental analysis of the digestate was comparable to results reported by other authors [41].…”

Section: Resultssupporting

confidence: 85%

Impact of the Type of Fertilization and the Addition of Glycerol on the Quality of Spring Rape Straw Pellets

Kachel‐Jakubowska¹,

Kraszkiewicz²,

Subr³

et al. 2020

Energies

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This paper presents an analysis of selected qualitative characteristics of pellets produced from rape straw obtained from cultivations subjected to different fertilization treatments and from mixtures of straw selected for testing with crude glycerol obtained as a by-product from biodiesel production. The assessment focused on the following qualities of the obtained pellets: Moisture content, mechanical durability, heating value and main elements, that is, carbon, hydrogen, nitrogen, sulphur, chlorine and oxygen. The obtained results indicated that the different treatment regimens applied in spring rape cultivations had a significant impact on the physicochemical qualities of the straw. In terms of the heating value, traditional fertilization with multi-component fertilizer (NPK) yielded slightly lower chemical parameters (lower carbon content and heat of combustion) than in the case of straw obtained from the control sample and from the plot fertilized with digestate. Furthermore, in all of the analysed mixtures, the 10% addition of raw glycerol improved the mechanical characteristics of the produced straw pellets. After the 10% glycerol addition, in terms of the energetic use of these biofuels, the parameters of the fuel, such as heating value and net heating value, were slightly decreased.

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Section: Resultssupporting

confidence: 85%

Impact of the Type of Fertilization and the Addition of Glycerol on the Quality of Spring Rape Straw Pellets

Kachel‐Jakubowska¹,

Kraszkiewicz²,

Subr³

et al. 2020

Energies

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“…For anaerobic fermentation (AD) in bioreactors and the production of biogas, substances having an organic structure can be used, in particular, purified wastewater, plant residues, grass silage, energy crops, agro-food industry waste (part of solid household waste, including fruit and vegetable residues, canteen waste, kitchen waste), green waste (grass clippings, leaves), livestock waste (pig and cow dung, chicken droppings) and food waste (animal fats, used cooking oil, restaurant degreasing tanks) (Bhatt and Tao 2020;Kathijotes et al 2015;Tilvikiene et al 2020), wood industry waste (Rawoof et al 2021;Honcharuk et al 2023), fishing and aquaculture waste (European Parliament 2009).…”

Section: Literature Reviewmentioning

confidence: 99%

An advanced European overview of the bioenergy efficiency of using digestate from biogas plants when growing agricultural crops

Lohosha,

Palamarchuk,

Krychkovskyi

et al. 2024

Polityka Energetyczna – Energy Policy Journal

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The paper highlights calculations of bioenergy indicators when growing corn for grain and vegetable crops in Ukraine. The research results indicate the economic benefit of growing these crops for all the variants studied. Our research established that an increase in the bioenergy efficiency of the production of these crops is achieved due to the use of different rates of fertilizer application. The increase in productivity that was obtained as a result of the implementation of farming practices exceeds additional costs associated with the use of fertilizers. This confirms the economic benefit of producing these types of crops due to the enhanced bioenergy efficiency achieved through the optimal application of fertilizer. The conducted research confirms the high energy efficiency of the bio-organic fertilizer (digestate) and the energy-saving technology of growing crops which were studied. High values of the coeffi-cients of energy efficiency were also observed in the variants with the simultaneous application of mineral fertilizers (N 90 P 90 K 90 ) and digestate-based bio-organic fertilizer "Efluent" (55.0 t/ha) on experimental sites of corn grown for grain (3.05-3.07), carrot (1.41-1.45) and red beet (1.97-2.00), but the cost of these variants also appeared to be the highest. Scientific research has used new methods and technologies for the effective processing of livestock waste in order to obtain organic fertilizer, which can be used to improve soil fertility and increase crop yields on the one hand, and biogas production as an energy-efficient process that has significant potential for producing ecologically clean and renewable energy on the other. The proposed approach to achieving energy efficiency helps to increase crop yield without increasing fertilization costs.

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“…As a result of the conducted experiments, when the digestate from the biogas plant was applied, it was established that the yield of potatoes increased by 30%, the yield of perennial lawn grasses increased by three times, cabbage and tomato seedlings increased by 12-15%, and biomass in general increased by 30-50% (Datsko and Maistrenko 2012). The conducted studies showed high efficiency of digestate as an organic fertilizer in the technologies of growing watermelon and cauliflower (Alburquerque et al 2012), kohlrabi (Lošák et al 2016), alfalfa and spring wheat (Koszel et al 2016), corn (Buligon et al 2023), wheat (Doyeni et al 2022;Doyeni et al 2021a;Barłóg et al 2019), tomatoes (Panuccio et al 2021;Stoknes et al 2018), lettuce (Kathijotes et al 2015;Brtnicky et al 2022), parsley (Pokhrel et al 2018), sorghum (Rakascan et al 2021), basil (Asp et al 2022), garden crops (Restrepo et al 2013), closed soil vegetables (Stewart et al 2005;Stoknes 2020;Barzee et al 2019;Liu et al 2011;Lee et al 2020), vegetables and other crops in non-soil systems on a digestate substrate (Restrepo et al 2013;Stoknes 2018), open ground vegetables and mushrooms, especially when anaerobic fermentation is combined with hydroponics (Stoknes et al 2016), etc., compared to traditional mineral and organic fertilizers.…”

Section: Literature Reviewmentioning

confidence: 99%

Economic efficiency of using digestate from biogas plants in Ukraine when growing agricultural crops as a way of achieving the goals of the European Green Deal

Lohosha¹,

Palamarchuk²,

Krychkovskyi³

2023

Polityka Energetyczna – Energy Policy Journal

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This paper presents calculations of the economic indicators of the researched elements of the cultivation technology of corn for grain and vegetable crops in Ukraine, which indicate that the cultivation of these crops is cost-effective in all variants of the experiment. The research has established that the increase in the economic efficiency of the production of these crops when applying different rates of fertilizers is achieved due to a more significant positive effect of the increase in productivity compared to additional costs associated with the use of these farming practices, while additional costs caused by the use of fertilizers are paid off many times over. It has been proven that the use of mineral fertilizers and their combination with high rates of bio-organic fertilizer (digestate) when growing agricultural crops helps to increase productivity. There have been further developed theoretical and practical provisions regarding the ecological problem of livestock waste disposal, 162 in particular those of pig farms, and agricultural farms, i.e. the provision of organic fertilizers to ensure the yield increase as well as improvement in the quality of agricultural and vegetable crops, so as to make it possible to obtain high-quality products of plant and vegetable production during livestock waste disposal. The proposed approach to the economic assessment of technologies for growing corn for grain and red beet depending on the fertilization system makes it possible to increase the level of productivity of agricultural and vegetable crops with the effective use of bio-organic fertilizers in the modern conditions of sharp increases in the costs of mineral fertilizers.

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Impacts of Biogas Digestate on Crop Production and the Environment: A Bulgarian Case Study

Cited by 10 publications

References 6 publications

Impact of the Type of Fertilization and the Addition of Glycerol on the Quality of Spring Rape Straw Pellets

Impact of the Type of Fertilization and the Addition of Glycerol on the Quality of Spring Rape Straw Pellets

An advanced European overview of the bioenergy efficiency of using digestate from biogas plants when growing agricultural crops

Economic efficiency of using digestate from biogas plants in Ukraine when growing agricultural crops as a way of achieving the goals of the European Green Deal

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