Digestate management in polish farms as an element of the nutrient cycle

Czekała, Wojciech; Lewicki, Andrzej; Pochwatka, Patrycja; Czekała, Agnieszka; Wojcieszak, Dawid; Jóźwiakowski, Krzysztof; Waliszewska, Hanna

doi:10.1016/j.jclepro.2019.118454

Cited by 82 publications

(54 citation statements)

References 48 publications

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“…In addition, utilization of Ulva sp., which is carbon neutral, for anaerobic digestion can produce renewable energy and closing nutrient cycle. The same advantage in digestate use on land was demonstrated by Czekała et al (2020). By contrast, this study proposed a new potential use of digestate in the sea.…”

Section: Discussionsupporting

confidence: 53%

“…However, one of the difficulties in promoting methane fermentation in urban areas such as Osaka, which is one of the most populous cities in Japan, is the generation of digestate (Kuroda et al, 2017). Although digestate can be used as fertilizer because of its nutrient-rich content, it is normally treated as wastewater because the available land area in urban spaces is limited, and even when digestate can be used as fertilizer, the value of digestate is estimated to be low because of its high moisture content, which is affected by the additional cost for hydration (Czekała et al, 2020). Therefore, discovering valuable uses of digestate is necessary.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Digestate from Methane Fermentation using Ulva sp. and Food Waste for Cultivation of Decolored Pyropia yezoensis (Edible Laver Seaweed)

Kuroda

Nishikawa

2020

EUROPEAN J SUSTAINAB DEV

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Ulva sp. (green seaweed) often proliferates explosively and piles up in shallows. This phenomenon is called "green tide," caused by increased nutrient flow into an enclosed sea area. Although green tide is one of the environmental problems in coastal areas, Ulva sp. can be regarded as carbon-neutral and therefore can serve as an abundant feedstock for renewable energy. Methane fermentation is one of the suitable techniques for converting such seaweed into energy. Digestate from methane fermentation is normally used as fertilizer; however, it is ends up being treated as wastewater due to limited spaces in urban areas. This paper proposes that the digestate from methane fermentation using mixed biomass (Ulva sp. and food waste) can be applied to the cultivation of Pyropia yezoensis (edible laver seaweed, nori in Japanese), which has recently suffered from decolored phenomena because of decreasing nutrients. The absorption of nutrients and the color recovery of nori were investigated in laboratory-scale experiments based on comparison with artificial seawater. The results highlight that the significant absorption of nutrients and color recovery occurred because of digestate utilization, indicating its positive effects on decolored nori. In addition, the experiments found that not only NH4-N, but also other substances such as trace metal related to Ulva sp. can influence such effects. The findings clearly indicate that digestate can be used in the sea and that the suggested multiple uses of digestate would increase the value of digestate.

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Section: Discussionsupporting

confidence: 53%

Section: Introductionmentioning

confidence: 99%

Effect of Digestate from Methane Fermentation using Ulva sp. and Food Waste for Cultivation of Decolored Pyropia yezoensis (Edible Laver Seaweed)

Kuroda

Nishikawa

2020

EUROPEAN J SUSTAINAB DEV

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“…Opportunities can be seen, inter alia, in the development of renewable energy sources and production of biomass for non-food purposes Zyadin et al 2019;Loizou et al 2019;Czekała et al 2020). There is a need for appropriate local programs to support these solutions as well as instruments that encourage the provision of services for the benefit of the environment in line with public demand.…”

Section: Results Of the Research And Discussionmentioning

confidence: 99%

Attitudes and opinions of farmers in the context of environmental protection in rural areas in Poland

Piwowar

2020

Environ Monit Assess

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This paper presents results of questionnaire surveys regarding the state of the natural environment in rural areas. The research was conducted on a sample of 1101 agricultural holdings in Poland. According to the analyses, agricultural producers are aware of environmental threats posed by irrational agricultural economy. Most respondents indicated the responsibility of farmers and other residents of rural areas as a basic condition for broadly understood environmental safety in rural areas in Poland. In the opinion of respondents, systems and programs for funding the replacement of heating boilers, thermomodernization of buildings, etc., are also important. There were significant differences in farmers' declarations, taking into account the age and level of education of the respondents, as well as features of agricultural holdings (area and economic size of the agricultural holding).

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“…Existing or emerging installations, despite the efficient methane fermentation process, have become unprofitable investments. The rescue plan for existing installations is based on the use of low cost industrial substrates that demonstrate high biogas yields [Czekała et al, 2020].…”

Section: The State Of the Biogas Market In Polandmentioning

confidence: 99%

New Trends in Substrates and Biogas Systems in Poland

Marks¹,

Dach²,

Fernández-Morales³

et al. 2020

J. Ecol. Eng.

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The amendment to the Polish Renewable Energy Act creates great opportunities for the development of the biogas market in Poland. Years of experience in biogas production in Western Europe and the development of biogas installations in Poland indicate the requirement to look for alternative substrates to those produced from dedicated crop production (mainly maize silage). Feasible solutions include the use of biodegradable waste from agriculture or industry as well as municipal landfill sites. The usage of these substrates in the methane fermentation process offers low cost, high biogas production and the safe management of biowaste. The arguments for using them in biogas installations are persuasive. This article presents new approaches of biogas plant installation solutions which allows for the effective fermentation of biowaste from animal and vegetable production, from the agro-food industry and from municipal waste.

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Digestate management in polish farms as an element of the nutrient cycle

Cited by 82 publications

References 48 publications

Effect of Digestate from Methane Fermentation using <i>Ulva</i> sp. and Food Waste for Cultivation of Decolored <i>Pyropia yezoensis</i> (Edible Laver Seaweed)

Effect of Digestate from Methane Fermentation using <i>Ulva</i> sp. and Food Waste for Cultivation of Decolored <i>Pyropia yezoensis</i> (Edible Laver Seaweed)

Attitudes and opinions of farmers in the context of environmental protection in rural areas in Poland

New Trends in Substrates and Biogas Systems in Poland

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