Anaerobic co‐digestion of perennials

Methane potential and digestate nitrogen fertilizer value

Bidragets oversatte titel: Samudrådning af fleårige græsmarksafgrøder: methan potentiale og kvælstofgødningsværdig af afgasset materiale

Dorette Sophie Müller-Stöver, Guotao Sun, Pablo Kroff, Sune Tjalfe Thomsen, Henrik Hauggaard-Nielsen

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

Co-digestion of crop biomass improves the traditional manure-based biogas yield due to an increased content of easily degradable carbon compounds. In this study, the methane potential of three perennials (grass, legumes, and grass+legume) was determined using various concentrations together with animal manure. The N mineralization dynamics in soil and the N-fertilizer value of the derived digestates was subsequently tested in both a soil incubation study and a pot experiment with spring barley as model crop.
Digestion of all tested crops together with a manure-based inoculum increased the cumulative methane yield 4 to 5 times compared to digestion of the inoculum alone, with the highest increases observed with pure grass as a substrate. However, the biomethane potential decreased along with increasing grass biomass concentration. In the plant pot experiment, all tested digestates increased barley shoot biomass by 40-170%, to an extent statistically comparable to mineral N fertilizer. However, the application of the digestate originating from fermentation with pure grass resulted in lower plant growth and a more fluctuating soil mineral N content throughout the incubation study compared to the other digestates.
The integration of grass-legume mixtures or sole legumes into anaerobic digestion systems as co-substrate for manure seems to be promising, especially when considering their high dry matter and methane yield ha-1 and the possibility to substitute mineral N fertilizer inputs utilizing leguminous biological N2 fixation capacity. This could contribute to the diversification of cropping systems for bioenergy production.
OriginalsprogEngelsk
TidsskriftJournal of Plant Nutrition and Soil Science
Vol/bind179
Udgave nummer6
Sider (fra-til)696-704
Antal sider8
ISSN1436-8730
DOI
StatusUdgivet - 2016

Emneord

  • lucerne
  • biogas
  • græs
  • fleårige afgrøder
  • rødkløver

Citer dette

Müller-Stöver, Dorette Sophie ; Sun, Guotao ; Kroff, Pablo ; Thomsen, Sune Tjalfe ; Hauggaard-Nielsen, Henrik. / Anaerobic co‐digestion of perennials : Methane potential and digestate nitrogen fertilizer value. I: Journal of Plant Nutrition and Soil Science. 2016 ; Bind 179, Nr. 6. s. 696-704.
@article{234038e97e8346e1be3c521bb8a6edf5,
title = "Anaerobic co‐digestion of perennials: Methane potential and digestate nitrogen fertilizer value",
abstract = "Co-digestion of crop biomass improves the traditional manure-based biogas yield due to an increased content of easily degradable carbon compounds. In this study, the methane potential of three perennials (grass, legumes, and grass+legume) was determined using various concentrations together with animal manure. The N mineralization dynamics in soil and the N-fertilizer value of the derived digestates was subsequently tested in both a soil incubation study and a pot experiment with spring barley as model crop.Digestion of all tested crops together with a manure-based inoculum increased the cumulative methane yield 4 to 5 times compared to digestion of the inoculum alone, with the highest increases observed with pure grass as a substrate. However, the biomethane potential decreased along with increasing grass biomass concentration. In the plant pot experiment, all tested digestates increased barley shoot biomass by 40-170{\%}, to an extent statistically comparable to mineral N fertilizer. However, the application of the digestate originating from fermentation with pure grass resulted in lower plant growth and a more fluctuating soil mineral N content throughout the incubation study compared to the other digestates. The integration of grass-legume mixtures or sole legumes into anaerobic digestion systems as co-substrate for manure seems to be promising, especially when considering their high dry matter and methane yield ha-1 and the possibility to substitute mineral N fertilizer inputs utilizing leguminous biological N2 fixation capacity. This could contribute to the diversification of cropping systems for bioenergy production.",
keywords = "lucerne, biogas, gr{\ae}s, fle{\aa}rige afgr{\o}der, r{\o}dkl{\o}ver, alfalfa, biogas, grass, perennials, red clover",
author = "M{\"u}ller-St{\"o}ver, {Dorette Sophie} and Guotao Sun and Pablo Kroff and Thomsen, {Sune Tjalfe} and Henrik Hauggaard-Nielsen",
year = "2016",
doi = "10.1002/jpln.201500599",
language = "English",
volume = "179",
pages = "696--704",
journal = "Journal of Plant Nutrition and Soil Science",
issn = "1436-8730",
publisher = "Wiley - V C H Verlag GmbH & Co. KGaA",
number = "6",

}

Anaerobic co‐digestion of perennials : Methane potential and digestate nitrogen fertilizer value. / Müller-Stöver, Dorette Sophie; Sun, Guotao; Kroff, Pablo; Thomsen, Sune Tjalfe; Hauggaard-Nielsen, Henrik.

I: Journal of Plant Nutrition and Soil Science, Bind 179, Nr. 6, 2016, s. 696-704.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Anaerobic co‐digestion of perennials

T2 - Methane potential and digestate nitrogen fertilizer value

AU - Müller-Stöver, Dorette Sophie

AU - Sun, Guotao

AU - Kroff, Pablo

AU - Thomsen, Sune Tjalfe

AU - Hauggaard-Nielsen, Henrik

PY - 2016

Y1 - 2016

N2 - Co-digestion of crop biomass improves the traditional manure-based biogas yield due to an increased content of easily degradable carbon compounds. In this study, the methane potential of three perennials (grass, legumes, and grass+legume) was determined using various concentrations together with animal manure. The N mineralization dynamics in soil and the N-fertilizer value of the derived digestates was subsequently tested in both a soil incubation study and a pot experiment with spring barley as model crop.Digestion of all tested crops together with a manure-based inoculum increased the cumulative methane yield 4 to 5 times compared to digestion of the inoculum alone, with the highest increases observed with pure grass as a substrate. However, the biomethane potential decreased along with increasing grass biomass concentration. In the plant pot experiment, all tested digestates increased barley shoot biomass by 40-170%, to an extent statistically comparable to mineral N fertilizer. However, the application of the digestate originating from fermentation with pure grass resulted in lower plant growth and a more fluctuating soil mineral N content throughout the incubation study compared to the other digestates. The integration of grass-legume mixtures or sole legumes into anaerobic digestion systems as co-substrate for manure seems to be promising, especially when considering their high dry matter and methane yield ha-1 and the possibility to substitute mineral N fertilizer inputs utilizing leguminous biological N2 fixation capacity. This could contribute to the diversification of cropping systems for bioenergy production.

AB - Co-digestion of crop biomass improves the traditional manure-based biogas yield due to an increased content of easily degradable carbon compounds. In this study, the methane potential of three perennials (grass, legumes, and grass+legume) was determined using various concentrations together with animal manure. The N mineralization dynamics in soil and the N-fertilizer value of the derived digestates was subsequently tested in both a soil incubation study and a pot experiment with spring barley as model crop.Digestion of all tested crops together with a manure-based inoculum increased the cumulative methane yield 4 to 5 times compared to digestion of the inoculum alone, with the highest increases observed with pure grass as a substrate. However, the biomethane potential decreased along with increasing grass biomass concentration. In the plant pot experiment, all tested digestates increased barley shoot biomass by 40-170%, to an extent statistically comparable to mineral N fertilizer. However, the application of the digestate originating from fermentation with pure grass resulted in lower plant growth and a more fluctuating soil mineral N content throughout the incubation study compared to the other digestates. The integration of grass-legume mixtures or sole legumes into anaerobic digestion systems as co-substrate for manure seems to be promising, especially when considering their high dry matter and methane yield ha-1 and the possibility to substitute mineral N fertilizer inputs utilizing leguminous biological N2 fixation capacity. This could contribute to the diversification of cropping systems for bioenergy production.

KW - lucerne

KW - biogas

KW - græs

KW - fleårige afgrøder

KW - rødkløver

KW - alfalfa

KW - biogas

KW - grass

KW - perennials

KW - red clover

U2 - 10.1002/jpln.201500599

DO - 10.1002/jpln.201500599

M3 - Journal article

VL - 179

SP - 696

EP - 704

JO - Journal of Plant Nutrition and Soil Science

JF - Journal of Plant Nutrition and Soil Science

SN - 1436-8730

IS - 6

ER -