Nutrient Recovery from Digestate: Systematic Technology Review and Product Classification

Vaneeckhaute, Céline; Lebuf, Viooltje; Michels, Evi; Belia, Evangelina; Vanrolleghem, Peter; Tack, Filip; Meers, Erik

doi:10.1007/s12649-016-9642-x

Cited by 305 publications

(243 citation statements)

References 81 publications

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“…Therefore, digestates are often transported to other farms. Alternatively, they can be further processed to bio-based mineral fertilizers (Vaneeckhaute et al, 2017). For example, nutrients can be recovered from the liquid fraction by precipitation and filtered off as a mixture of phosphate salts, including struvite Ehmann et al, 2017).…”

Section: Implications Of Different Fertilization Systemsmentioning

confidence: 99%

“…Depending on the operating system (including pH and temperature) of the biogas plant, N can also be lost (as NH 3 ) to a certain extent (Reinhold et al, 2004). However, most of the N and all other mineral elements contained in the input substrates remain in the biogas digestates (Vaneeckhaute et al, 2017). These include major plant nutrients such as phosphorus, potassium and calcium.…”

Section: Introductionmentioning

confidence: 99%

“…The solid fraction contains approx. 20% of the total N, a third of the total phosphorus and 15% of the potassium and up to 35% total solids (Rolink, 2013;Vaneeckhaute et al, 2017). Farmers often collaborate with the (more or less) neighboring farms supplying them with biomass in order to optimize operation capacity, particularly in larger biogas plants.…”

Section: Introductionmentioning

confidence: 99%

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Fertilizing Potential of Separated Biogas Digestates in Annual and Perennial Biomass Production Systems

Ehmann

Thumm

Lewandowski

2018

Front. Sustain. Food Syst.

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Digestates produced by the increasing number of biogas plants require appropriate treatment or recycling. This study investigates the fertilizing potential of separated biogas digestates. These contain valuable nutrients and can be used in agriculture to close the nutrient cycle. Multi-year field experiments were established at two challenging sites in south-west Germany in 2010; results from 6 years are shown here. The objectives were to determine (1) whether separated digestates can complement or substitute mineral fertilizers and (2) their effect on long-term yield performance in different biomass cropping and fertilization systems. The fertilizing performance was assessed in a split-plot design with four replications using three cropping systems: (1) perennial grassland; (2) intercropping of triticale and clover grass; (3) silage maize. Five N fertilization treatments were applied, each at 150 kg N ha −1 :• mineral fertilizer (calcium ammonium nitrate) • combined solid digestate fraction and mineral fertilizer • solid digestate fraction • combined liquid digestate fraction and mineral fertilizer • liquid digestate fraction.The influences of site, cropping system, year and fertilization treatment were highly significant.The mineral fertilizer and combination "liquid digestate fraction + mineral fertilizer" mostly led to the highest quantitative biomass yields in all cropping systems at both sites. Fertilization with solid digestate fraction produced lowest yields in all fertilized plots, with results very often not significantly different from the untreated control. Maize achieved relatively high yields in years with favorable weather conditions; unfavorable conditions led to low yields. The grassland and intercropping systems were less susceptible to weather conditions, producing a more constant biomass supply irrespective of site, treatment and year. The separated biogas digestates were found to have a comparable effect to mineral fertilizer on biomass yield, but this varied with cropping system. In the intercropping system, complete substitution was Ehmann et al. Fertilizing With Separated Biogas Digestates possible. The solid fraction is more likely to contribute positively to soil humus in annual systems. In general, the combined application of digestate and mineral fertilizer is highly recommendable to meet crops' short-and long-term N demand, even on challenging sites. In this study, it allowed a mineral fertilizer input reduction of 66%.

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Section: Implications Of Different Fertilization Systemsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fertilizing Potential of Separated Biogas Digestates in Annual and Perennial Biomass Production Systems

Ehmann

Thumm

Lewandowski

2018

Front. Sustain. Food Syst.

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“…Over the years, several technologies have been developed for treating and processing manure even to the standard of generating by-products of such quality that they can be used in manufacturing chemical fertilizers [78,79]. Such technologies, some of which have been implemented at commercial scale could mitigate the reuse limitations of the Nitrates Directive by generating chemical fertilizer products from excess manure.…”

Section: Phosphorus Reuse and Recyclingmentioning

confidence: 99%

Bridging Gaps in the Agricultural Phosphorus Cycle from an Animal Husbandry Perspective—The Case of Pigs and Poultry

et al. 2018

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Since phosphorus (P) is an essential element for life, its usage and application across agricultural production systems requires great attention. Monogastric species such as pigs and poultry can significantly contribute to global food security but these animals remain highly dependent on the supply of mineral inorganic P in their feeds. Pig and poultry, which represent 70% of the global meat production, are also major P excretors and thus represent important sources of environmental P inputs. Balancing the P cycle within farming systems is crucial to achieve P sustainable and resilient livestock production. Therefore, the interconnection of animal feed, livestock farming, manure, and soil/aquatic ecosystems requires multidisciplinary approaches to improve P management. With regard to a sustainable agricultural P cycle, this study addresses aspects of feeding strategies and animal physiology (e.g., phase feeding, P conditioning, liquid feeding, phytase supplementation, genetics), soil agroecosystems (e.g., P cycling, P losses, P gains), reuse and recycling (e.g., manure, slaughter waste), measures of farmers' economic performance (e.g., bio-economic models), and P governance/policy instruments (e.g., P quota, P tax). To reconcile the economic and ecological sustainability of animal husbandry, the strategic objective of future research will be to provide solutions for a sufficient supply of high-quality animal products from resource-efficient and economically competitive agro-systems which are valued by society and preserve soil and aquatic ecosystems.

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“…Anaerobic digestion is considered an environmentally friendly technology for bio‐energy production, organic biodegradable waste valorization, and potential recovery of nutrients from the digestate ( Vaneeckhaute et al, ). Although the digestates can be returned to agricultural land in their crude unprocessed form, there are controversial reports on their agronomic potential and serious concerns about negative effects on the environment and human health, including biological contamination ( Nkoa , ).…”

Section: Introductionmentioning

confidence: 99%

Innovative liquid formulation of digestates for producing a biofertilizer based on Bacillus siamensis: Field testing on sweet pepper

Pastor-Bueis

Mulas

Gómez

et al. 2017

J. Plant Nutr. Soil Sci.

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A biofertilizer (BF) based on the plant growth promoting rhizobacterium (PGPR) Bacillus siamensis was produced using anaerobic digestate (AD) as the main ingredient of the growth medium, alongside a carbon source from residual origin. The use of residues for the growth of PGPR reduces the production costs of biofertilizers, but makes an assessment of the possible toxicity of residues for the bacteria or plants necessary. Therefore, the growth medium of PGPR was first optimized using the response surface methodology (RSM), followed by phytotoxicity tests and a field trial of the BF in a sweet pepper (Capsicum annuum L.) crop at two different locations. AD at 50% dilution, supplemented with 2.3% sugar beet molasses, was the optimum growth medium for producing the BF, with a bacterial concentration of 109 cfu mL−1. In the field trial, the treatments inoculated with BF and fertilized with decreased mineral N (80%) produced significantly better yields per ha than the controls with decreased N (80%) and full N (100%) without BF. This indicates improved efficiency of N use by the crop, as a consequence of the use of BF.

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Nutrient Recovery from Digestate: Systematic Technology Review and Product Classification

Cited by 305 publications

References 81 publications

Fertilizing Potential of Separated Biogas Digestates in Annual and Perennial Biomass Production Systems

Fertilizing Potential of Separated Biogas Digestates in Annual and Perennial Biomass Production Systems

Bridging Gaps in the Agricultural Phosphorus Cycle from an Animal Husbandry Perspective—The Case of Pigs and Poultry

Innovative liquid formulation of digestates for producing a biofertilizer based on Bacillus siamensis: Field testing on sweet pepper

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