Biowaste Digestates: Influence of Pelletization on Nutrient Release and Early Plant Development of Oats

Roß, Christina‐Luise; Mundschenk, Eva; Wilken, Verena; Sensel-Gunke, Karen; Ellmer, Frank

doi:10.1007/s12649-016-9794-8

Cited by 7 publications

(7 citation statements)

References 21 publications

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“…Post-digestion processes may also impact P availability of anaerobic digestates. Ross et al (2018) found that addition of a pelletized composted digestate did not increase double lactate extractable soil test P compared with a control, whereas the unpelletized digestate did increase available P in an oat (Avena sativa L.) pot experiment. Further study of the impact of processes like drying and pelletization on P availability in digestate products is warranted.…”

Section: Anaerobic Digestatementioning

confidence: 89%

Recycled nutrients as a phosphorus source for Canadian organic agriculture: a perspective

Nicksy

Entz

2021

Can. J. Soil. Sci.

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The challenges associated with the global phosphorus (P) cycle are complex and multi-faceted, from geological resource limitation, to P deficiency on arable farmland, to environmental contamination via excess P fertilization. While no single solution can address all of the challenges associated with the P cycle, the principle of circularity provides a framework toward a more sustainable and food-secure P system. Phosphorus deficiency on farmland is widespread, particularly on organically managed farms due to negative P balances in low-input cropping systems. Recycled nutrient sources divert food and human wastes back onto farmland; they have the potential to ameliorate both the global scale issues of phosphate rock depletion and environmental contamination, and the farm-scale issue of P deficiency, particularly for organic farms. In order for recycled nutrients to act as viable alternatives to conventional nutrient sources, their ability to supply P and improve yields must be demonstrated. This paper provides an introduction to the importance of recycled fertilizer sources in the global P cycle, and the key role they can play on organic farmland in Canada.

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Section: Anaerobic Digestatementioning

confidence: 89%

Recycled nutrients as a phosphorus source for Canadian organic agriculture: a perspective

Nicksy

Entz

2021

Can. J. Soil. Sci.

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“…According to Ross et al (2018), the pellet or granule derived from fermented sludge can improve the transportability and storage of the fermented liquid. They found that products derived from fermented sludge treated in different ways (composted, pelletized and granulated) only slowly break down during nutrient supply and the release of nutrients is low, especially for nitrogen.…”

Section: Ingredients and Fertilization Effects Of Separated Biodieselmentioning

confidence: 99%

“…On this basis, the nutritional utility of the processed fermented sludge should be considered limited, irrespective of the actual nutrient content. However, the previously mentioned fertilizers, as a result of increasing carbon content, are well suited to improving the humus content of soil poor in organic matter [57]. Ball et al (2004) also found that pelletizing is a useful method for preserving the nutrient content of organic materials and that nitrogen is slowly and permanently released during application of the organic fertilizer pellet [58].…”

Section: Ingredients and Fertilization Effects Of Separated Biodieselmentioning

confidence: 99%

“…The composition of organic fertilization pellet was calculated on the data of Thomas et al (2017) [56], Ross et al (2018) [57], Kratzeisen et al (2010) [54] and Haggard et al (2005) [60]. Since the nitrogen content significantly reduces during drying, we considered only its phosphorus-(0.8%) and potassium-content (1.5%) for pricing.…”

Section: Name Of the Equipment Investment Cost (€) Fixed Cost (€/Annumentioning

confidence: 99%

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Economic Analysis of Pellet Production in Co-Digestion Biogas Plants

et al. 2018

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In our paper we examine the economics of a technological process which utilizes the separated biogas plant digestate as the primary material and, as auxiliary material, the waste heat produced by the cogeneration process, to produce a marketable pellet which can be used in two ways (to supply soil nutrients and heat energy). Using multivariate linear regression model we developed an equation for the biogas yield from the modelled production recipe and expected nutrient pellet prices, and sensitivity analysis were also performed for the substrate dry matter content. We found that pellets can be produced at a cost of 88-90 EUR/ton with a 6 to 10% dry matter substrate content and that, primarily, sales of pellets for heating justify pelleting; producer's own use and use for nutrient purposes can only be justified in exceptional cases. In the case of dry solid content above 5%, the process does not require the total amount of waste heat; some of this can be used to cover other heat requirements.

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“…Moreover, the application of the solid fraction of digestates resulted in significant lower yields compared to the liquid digestates and mineral fertilizers [15,16]. This solid phase is therefore characterized as an organic fertilizer similar to solid manure but with high N and P contents, appropriate for the application to arable lands to enhance the soil humus formation [6] and to increase the soil organic matter (SOM) content in soils poor in organic matter [17]. On the other hand, liquid phases are characterized by low dry matter and more available P and high N (mainly as NH 4 þ -N) and high K contents [6,18].…”

Section: Introductionmentioning

confidence: 99%

The fertilising potential of manure-based biogas fermentation residues: pelleted vs. liquid digestate

Valentinuzzi

Cavani

Porfido

et al. 2020

Heliyon

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Spreading of manure on agricultural soils is a main source of ammonia emissions and/or nitrate leaching. It has been addressed by the European Union with the Directives 2001/81/EC and 91/676/EEC to protect the environment and the human health. The disposal of manure has therefore become an economic and environmental challenge for farmers. Thus, the conversion of manure via anaerobic digestion in a biogas plant could be a sustainable solution, having the byproducts (solid and liquid digestates) the potential to be used as fertilizers for crops.This work aimed at characterizing and assessing the effect of digestates obtained from a local biogas plant (Biogas Wipptal, Gmbh), either in the form of liquid fraction or as a solid pellet on: (i) the fertility of the soils during an incubation experiment; (ii) the plant growth and nutritional status of different species (maize and cucumber). Moreover, an extensive characterization of the pellet was performed via X-ray microanalytical techniques.The data obtained showed that both digestates exhibit a fertilizing potential for crops, depending on the plant species and the fertilizer dose: the liquid fraction increases the shoot fresh weight at low dose in cucumber, conversely, the solid pellet increases the shoot fresh weight at high dose in maize. The liquid digestate may have the advantage to release nutrients (i.e. nitrogen) more rapidly to plants, but its storage represents the main constraint (i.e. ammonia volatilization). Indeed, pelleting the digestates could improve the storability of the fertilizer besides enhancing plant nutrient availability (i.e. phosphate and potassium), plant biomass and soil biochemical quality (i.e. microbial biomass and activity). The physical structure and chemical composition of pellet digestates allow nutrients to be easily mobilized over time, representing a possible source of mineral nutrients also in long-term applications.

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Biowaste Digestates: Influence of Pelletization on Nutrient Release and Early Plant Development of Oats

Cited by 7 publications

References 21 publications

Recycled nutrients as a phosphorus source for Canadian organic agriculture: a perspective

Recycled nutrients as a phosphorus source for Canadian organic agriculture: a perspective

Economic Analysis of Pellet Production in Co-Digestion Biogas Plants

The fertilising potential of manure-based biogas fermentation residues: pelleted vs. liquid digestate

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