A critical review on the techno-economic feasibility of nutrients recovery from anaerobic digestate in the agricultural sector

Rizzioli, Fabio; Bertasini, Davide; Bolzonella, David; Frison, Nicola; Battısta, Federico

doi:10.1016/j.seppur.2022.122690

Cited by 48 publications

(10 citation statements)

References 101 publications

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“…In contrast, there is a noticeable lack of research focusing on advanced valorisation products [15], which include nutrient recovery for use either as a separate fertiliser or as an integral part of a conventional fertiliser. It is also notable that most of the existing studies have focused on the recovery process itself rather than assessing its effectiveness in improving crop performance [34,35].…”

Section: Discussionmentioning

confidence: 99%

Fertilising Maize with Bio-Based Mineral Fertilisers Gives Similar Growth to Conventional Fertilisers and Does Not Alter Soil Microbiome

Barquero,

Cazador,

Ortiz-Liébana

et al. 2024

Agronomy

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The production of mineral fertilisers relies heavily on mineral deposits that are becoming depleted or is based on processes that are highly energy demanding. In this context, and in line with the circular economy and the European Green Deal, the recovery of nitrogen (N), phosphorus (P), and potassium (K) from organic wastes using chemical technologies is an important strategy to produce secondary raw materials for incorporation into mineral fertilisers, partially replacing the traditional sources of N, P, and K. However, there are very few studies on the agronomic and environmental effects of such substitution. The aim of this work was to evaluate plant growth under microcosm conditions and the effect on the soil microbiome of mineral fertilisers in which part of the N, P, or K content comes from bio-based materials (BBMFs), namely ash, struvite, and a patented chemical process. The crop was maize, and a metataxonomic approach was used to assess the effect on the soil microbiome. The BBMF treatments were compared with a control treated with a conventional mineral fertiliser. The conventional fertiliser performed significantly better than the bio-based fertilisers in terms of maize biomass production at the first sampling point 60 days after sowing (DAS), but at the last sampling point, 90 DAS, the BBMFs showed comparable or even better biomass production than the conventional one. This suggests that BBMFs may have a slightly slower nutrient release rate. The use of fertiliser, whether conventional or BBMF, resulted in a significant increase in microbiome biodiversity (Shannon index), while it did not affect species richness. Interestingly, the use of fertilisers modulated the composition of the bacterial community, increasing the abundance of beneficial bacterial taxa considered to be plant-growth-promoting bacteria, without significant differences between the conventional mineral fertilisers and the BBMFs. The predominance of PGPRs in the rhizosphere of crops when BBMFs are used could be part of the reason why BBMFs perform similarly or even better than conventional fertilisers, even if the rate of nutrient release is slower. This hypothesis will be tested in future field trials. Thus, BBMFs are an interesting option to make the food chain more sustainable.

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Section: Discussionmentioning

confidence: 99%

Fertilising Maize with Bio-Based Mineral Fertilisers Gives Similar Growth to Conventional Fertilisers and Does Not Alter Soil Microbiome

Barquero,

Cazador,

Ortiz-Liébana

et al. 2024

Agronomy

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“…Subsequently, ultrafiltration (pore size > 0.001 µm, pressure 2-10 bar) is performed to remove all SS and microorganisms. Finally, the remaining small molecules and ions are removed by reverse osmosis (pore size < 1 nm, pressure 10-100 bar) steps to obtain nutrient-rich osmotic residues and clean water that can penetrate the membrane [30]. Membrane technology has unique advantages, such as low energy consumption and continuous separation, and has been widely used in many industries [11].…”

Section: Membrane Processingmentioning

confidence: 99%

Research Advancements in Swine Wastewater Treatment and Resource-Based Safe Utilization Management Technology Model Construction

Chen,

Zhu,

et al. 2024

Water

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Swine wastewater contains large amounts of organic matter, nutrients, toxic metal elements, and antibiotics. If it is directly discharged or not properly treated, it poses a significant threat to the environment and human health. Currently, the management of swine wastewater has become a focus of social attention, and it adopts a dual-track parallel model of standard discharge supplemented by resource utilization. If treated properly, it can achieve the recycling of water resources and promote the effective recovery of resources. Based on the pollution characteristics of swine wastewater, this paper analyzes its impact on the environment, society, and the economy in detail and expounds on the research progress of swine wastewater treatment technology. From the perspective of resource utilization and recycling of anaerobic digestion liquid (biogas slurry) from swine wastewater and the carrying capacity of the soil environment and cumulative ecological environmental risks, this study explores new development trends and application prospects for swine wastewater treatment technology.

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“…In the development of renewable energy, increasing numbers of biogas plants for industrial utilization of anaerobic digestion of agro-industrial residues and domestic organic wastes, produce large amounts of highly diverse digestates [1]. Their suitability as alternative fertilizers needs to be tested (e.g., [2][3][4]).…”

Section: Introductionmentioning

confidence: 99%

Influence of Biogas Digestates on the Composition of Soil Organic Matter

Jandl¹,

Horn²,

Schroeder³

et al. 2023

J Energ Power Technol

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The increasing number of biogas plants with various digested organic materials and output of digestates calls for more detailed investigations of their suitability as soil amendments. In a trial in Northern Germany two replicate plots each were treated with fresh or prolonged fermented digestate to investigate the influence of digestates on the composition of soil organic matter (SOM). The relative proportions of relevant SOM compound classes were determined by pyrolysis-field ionization mass spectrometry (Py-FIMS) and pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS). Using these two methods the influence of digestate on the SOM composition was illustrated by the statistical spectra evaluation by principal component analysis. In both digestate-treated plots, the relative proportions of the slowly degradable alkylaromatic compounds and lipids were larger. In contrast, easily degradable carbohydrates and amides and mostly heterocyclic N-compounds were less than in the control plots. However, these SOM differences due to digestates were less pronounced than differences in the composition of autochthonous SOM in the control plots. In one of the treatments N- and alkylaromatic compounds were more abundant in the aggregate core than on the aggregate surface. In contrast, aliphatic compounds were more abundant on the aggregate surface as disclosed by Py-FI and pyrolysis-gas chromatography-mass spectra (Py-GC/MS). In conclusion, increasing amounts of digestate should be critically monitored according to different digestate feedstock, soil types, ecological factors and crop growth/yield.

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A critical review on the techno-economic feasibility of nutrients recovery from anaerobic digestate in the agricultural sector

Cited by 48 publications

References 101 publications

Fertilising Maize with Bio-Based Mineral Fertilisers Gives Similar Growth to Conventional Fertilisers and Does Not Alter Soil Microbiome

Fertilising Maize with Bio-Based Mineral Fertilisers Gives Similar Growth to Conventional Fertilisers and Does Not Alter Soil Microbiome

Research Advancements in Swine Wastewater Treatment and Resource-Based Safe Utilization Management Technology Model Construction

Influence of Biogas Digestates on the Composition of Soil Organic Matter

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