Anaerobic digestion for closing the loop of a biorefinery for organic farming: Production of biogas and organic fertilizer from process residues.

Maria Santamaria-Fernandez, Nanna Karkov Ytting, Mette Lübeck, Hinrich Wilhelm Uellendahl

Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceabstrakt i proceedingForskningpeer review

Resumé

The availability of organic animal feed for monogastric animals and organic fertilizer is in many regions a limiting factor for the further spread of organic farming. The production of these two commodities based on regionally organically grown grass biomass is the main target of a green biorefinery concept called Organofinery. After extraction of leaf protein concentrate from the grass, anaerobic digestion (AD) of the residual streams is a key process to extract both the energetic and the nutritional value of the residual biomass in the biorefinery. Biogas potentials of the residual streams were determined in batch and reactor experiments and mass balances of the nutrients were established based on analysis of N, P, K, and S from the different process stages (screw pressing, protein precipitation and AD process). The AD process was tested in lab-scale both as co-digestion of press cake and brown juice in a continuous stirred tank reactor (CSTR) and of the brown juice alone in an up-flow anaerobic sludge blanket (UASB) reactor. Both reactor processes showed stable performance without signs of inhibition or nutrient deficiency. In mesophilic co-digestion (50:50 ratio based on VS) of press cake and brown juice at 20d hydraulic retention time (HRT) methane yields of 237 to 283 L-CH4/kg-VS were achieved while mesophilic treatment of brown juice in the high-rate reactor yielded on average 202 L-CH4/kg-VS at 3 days HRT. Nutrient analysis showed that most of the nutrients of the fresh crop were left in the press cake with a similar nutrient composition as in the input biomass, whereas the brown juice contained only 13-38% of the input nutrients with lower proportions of N and S. A full evaluation of the AD process including biogas yields and of the nutritional value of the digestate from the processes will be presented at the conference.
OriginalsprogEngelsk
TitelProceedings 1st International Conference on Bioresource Technology for Bioenergy, Bioproducts and Environmental Sustainability
Publikationsdato2016
StatusUdgivet - 2016
Begivenhed1st International Conference on Bioresource Technology for Bioenergy, Bioproducts and Environmental Sustainability - Sitges, Spanien
Varighed: 23 okt. 201626 okt. 2016
Konferencens nummer: 1
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Konference

Konference1st International Conference on Bioresource Technology for Bioenergy, Bioproducts and Environmental Sustainability
Nummer1
LandSpanien
BySitges
Periode23/10/201626/10/2016
Internetadresse

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biorefining
anaerobic digestion
biogas
organic fertilizers
organic production
juices
oilseed cakes
methane
biomass
nutrients
fluid mechanics
nutritive value
digestion
leaf protein concentrate
upflow anaerobic sludge blanket reactor
grasses
monogastric livestock
nutrient balance
pressing
nutrient deficiencies

Citer dette

Santamaria-Fernandez, M., Karkov Ytting, N., Lübeck, M., & Uellendahl, H. W. (2016). Anaerobic digestion for closing the loop of a biorefinery for organic farming: Production of biogas and organic fertilizer from process residues. I Proceedings 1st International Conference on Bioresource Technology for Bioenergy, Bioproducts and Environmental Sustainability
Santamaria-Fernandez, Maria ; Karkov Ytting, Nanna ; Lübeck, Mette ; Uellendahl, Hinrich Wilhelm. / Anaerobic digestion for closing the loop of a biorefinery for organic farming : Production of biogas and organic fertilizer from process residues. Proceedings 1st International Conference on Bioresource Technology for Bioenergy, Bioproducts and Environmental Sustainability. 2016.
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Santamaria-Fernandez, M, Karkov Ytting, N, Lübeck, M & Uellendahl, HW 2016, Anaerobic digestion for closing the loop of a biorefinery for organic farming: Production of biogas and organic fertilizer from process residues. i Proceedings 1st International Conference on Bioresource Technology for Bioenergy, Bioproducts and Environmental Sustainability. 1st International Conference on Bioresource Technology for Bioenergy, Bioproducts and Environmental Sustainability, Sitges, Spanien, 23/10/2016.

Anaerobic digestion for closing the loop of a biorefinery for organic farming : Production of biogas and organic fertilizer from process residues. / Santamaria-Fernandez, Maria ; Karkov Ytting, Nanna; Lübeck, Mette; Uellendahl, Hinrich Wilhelm.

Proceedings 1st International Conference on Bioresource Technology for Bioenergy, Bioproducts and Environmental Sustainability. 2016.

Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceabstrakt i proceedingForskningpeer review

TY - ABST

T1 - Anaerobic digestion for closing the loop of a biorefinery for organic farming

T2 - Production of biogas and organic fertilizer from process residues.

AU - Santamaria-Fernandez, Maria

AU - Karkov Ytting, Nanna

AU - Lübeck, Mette

AU - Uellendahl, Hinrich Wilhelm

PY - 2016

Y1 - 2016

N2 - The availability of organic animal feed for monogastric animals and organic fertilizer is in many regions a limiting factor for the further spread of organic farming. The production of these two commodities based on regionally organically grown grass biomass is the main target of a green biorefinery concept called Organofinery. After extraction of leaf protein concentrate from the grass, anaerobic digestion (AD) of the residual streams is a key process to extract both the energetic and the nutritional value of the residual biomass in the biorefinery. Biogas potentials of the residual streams were determined in batch and reactor experiments and mass balances of the nutrients were established based on analysis of N, P, K, and S from the different process stages (screw pressing, protein precipitation and AD process). The AD process was tested in lab-scale both as co-digestion of press cake and brown juice in a continuous stirred tank reactor (CSTR) and of the brown juice alone in an up-flow anaerobic sludge blanket (UASB) reactor. Both reactor processes showed stable performance without signs of inhibition or nutrient deficiency. In mesophilic co-digestion (50:50 ratio based on VS) of press cake and brown juice at 20d hydraulic retention time (HRT) methane yields of 237 to 283 L-CH4/kg-VS were achieved while mesophilic treatment of brown juice in the high-rate reactor yielded on average 202 L-CH4/kg-VS at 3 days HRT. Nutrient analysis showed that most of the nutrients of the fresh crop were left in the press cake with a similar nutrient composition as in the input biomass, whereas the brown juice contained only 13-38% of the input nutrients with lower proportions of N and S. A full evaluation of the AD process including biogas yields and of the nutritional value of the digestate from the processes will be presented at the conference.

AB - The availability of organic animal feed for monogastric animals and organic fertilizer is in many regions a limiting factor for the further spread of organic farming. The production of these two commodities based on regionally organically grown grass biomass is the main target of a green biorefinery concept called Organofinery. After extraction of leaf protein concentrate from the grass, anaerobic digestion (AD) of the residual streams is a key process to extract both the energetic and the nutritional value of the residual biomass in the biorefinery. Biogas potentials of the residual streams were determined in batch and reactor experiments and mass balances of the nutrients were established based on analysis of N, P, K, and S from the different process stages (screw pressing, protein precipitation and AD process). The AD process was tested in lab-scale both as co-digestion of press cake and brown juice in a continuous stirred tank reactor (CSTR) and of the brown juice alone in an up-flow anaerobic sludge blanket (UASB) reactor. Both reactor processes showed stable performance without signs of inhibition or nutrient deficiency. In mesophilic co-digestion (50:50 ratio based on VS) of press cake and brown juice at 20d hydraulic retention time (HRT) methane yields of 237 to 283 L-CH4/kg-VS were achieved while mesophilic treatment of brown juice in the high-rate reactor yielded on average 202 L-CH4/kg-VS at 3 days HRT. Nutrient analysis showed that most of the nutrients of the fresh crop were left in the press cake with a similar nutrient composition as in the input biomass, whereas the brown juice contained only 13-38% of the input nutrients with lower proportions of N and S. A full evaluation of the AD process including biogas yields and of the nutritional value of the digestate from the processes will be presented at the conference.

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Santamaria-Fernandez M, Karkov Ytting N, Lübeck M, Uellendahl HW. Anaerobic digestion for closing the loop of a biorefinery for organic farming: Production of biogas and organic fertilizer from process residues. I Proceedings 1st International Conference on Bioresource Technology for Bioenergy, Bioproducts and Environmental Sustainability. 2016