Return of phosphorus in agricultural residues and urban sewage sludge to soil using biochar from low-temperature gasification as fertilizer product

Dorette Sophie Müller-Stöver, Lars Stoumann Jensen, Mette Grønlund, Iver Jakobsen, Henrik Hauggaard-Nielsen, Jesper Ahrenfeldt

Publikation: KonferencebidragKonferenceabstrakt til konferenceForskning

Resumé

The return of residual products from bioenergy generation to soils is a step towards closing nutrient cycles, which is especially important for nutrients produced from non-renewable resources such as phosphorus (P). Low-temperature gasification is an innovative process efficiently generating energy from different biomass fuels, such as agricultural residues and waste streams, and at the same time producing a biochar product potentially valuable for soil amendment. In pot experiments, different residual products originating from low-temperature gasification were tested for their P-fertilizing potential with spring barley as a test crop. Biochar resulting from gasification of pure wheat straw showed the best P fertilizer value, however, because of the low P content, extremely high amounts had to be applied when crop P demand should be met, which came along with an over-fertilization of potassium (K). Gasification of pure sewage sludge with a high Fe and Al content practically eliminated its P fertilizer value, while co-gasification of sludge lower in Fe and Al together with wheat straw resulted in a biochar product with only somewhat reduced P availability and improved P/K ratio for fertilization purposes. Operationally defined P pools in soil obtained by sequential chemical extraction of the biochar-amended soils could be related to the observations made in the pot experiments. The results emphasize the potential of combining different feedstocks for thermal conversion processes when aiming at improving the usability of the residual products.

Konference

KonferenceJoint International Biochar Symposium 2015
LokationGeisenheim University
LandTyskland
ByGeisenheim
Periode28/09/201530/09/2015

Citer dette

Müller-Stöver, D. S., Jensen, L. S., Grønlund, M., Jakobsen, I., Hauggaard-Nielsen, H., & Ahrenfeldt, J. (2015). Return of phosphorus in agricultural residues and urban sewage sludge to soil using biochar from low-temperature gasification as fertilizer product. Abstract fra Joint International Biochar Symposium 2015, Geisenheim, Tyskland.
Müller-Stöver, Dorette Sophie ; Jensen, Lars Stoumann ; Grønlund, Mette ; Jakobsen, Iver ; Hauggaard-Nielsen, Henrik ; Ahrenfeldt, Jesper. / Return of phosphorus in agricultural residues and urban sewage sludge to soil using biochar from low-temperature gasification as fertilizer product. Abstract fra Joint International Biochar Symposium 2015, Geisenheim, Tyskland.
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title = "Return of phosphorus in agricultural residues and urban sewage sludge to soil using biochar from low-temperature gasification as fertilizer product",
abstract = "The return of residual products from bioenergy generation to soils is a step towards closing nutrient cycles, which is especially important for nutrients produced from non-renewable resources such as phosphorus (P). Low-temperature gasification is an innovative process efficiently generating energy from different biomass fuels, such as agricultural residues and waste streams, and at the same time producing a biochar product potentially valuable for soil amendment. In pot experiments, different residual products originating from low-temperature gasification were tested for their P-fertilizing potential with spring barley as a test crop. Biochar resulting from gasification of pure wheat straw showed the best P fertilizer value, however, because of the low P content, extremely high amounts had to be applied when crop P demand should be met, which came along with an over-fertilization of potassium (K). Gasification of pure sewage sludge with a high Fe and Al content practically eliminated its P fertilizer value, while co-gasification of sludge lower in Fe and Al together with wheat straw resulted in a biochar product with only somewhat reduced P availability and improved P/K ratio for fertilization purposes. Operationally defined P pools in soil obtained by sequential chemical extraction of the biochar-amended soils could be related to the observations made in the pot experiments. The results emphasize the potential of combining different feedstocks for thermal conversion processes when aiming at improving the usability of the residual products",
author = "M{\"u}ller-St{\"o}ver, {Dorette Sophie} and Jensen, {Lars Stoumann} and Mette Gr{\o}nlund and Iver Jakobsen and Henrik Hauggaard-Nielsen and Jesper Ahrenfeldt",
year = "2015",
language = "English",
note = "Joint International Biochar Symposium 2015 : The Joint International Biochar Symposium 2015 aims at understanding mechanisms that enable beneficial and safe biochar implementation, by uniting the two often separated, co-existing “worlds” of practitioners, stakeholders and applicants with biochar scientists for inspiring exchange. ; Conference date: 28-09-2015 Through 30-09-2015",

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Müller-Stöver, DS, Jensen, LS, Grønlund, M, Jakobsen, I, Hauggaard-Nielsen, H & Ahrenfeldt, J 2015, 'Return of phosphorus in agricultural residues and urban sewage sludge to soil using biochar from low-temperature gasification as fertilizer product', Geisenheim, Tyskland, 28/09/2015 - 30/09/2015, .

Return of phosphorus in agricultural residues and urban sewage sludge to soil using biochar from low-temperature gasification as fertilizer product. / Müller-Stöver, Dorette Sophie; Jensen, Lars Stoumann; Grønlund, Mette; Jakobsen, Iver; Hauggaard-Nielsen, Henrik; Ahrenfeldt, Jesper.

2015. Abstract fra Joint International Biochar Symposium 2015, Geisenheim, Tyskland.

Publikation: KonferencebidragKonferenceabstrakt til konferenceForskning

TY - ABST

T1 - Return of phosphorus in agricultural residues and urban sewage sludge to soil using biochar from low-temperature gasification as fertilizer product

AU - Müller-Stöver, Dorette Sophie

AU - Jensen, Lars Stoumann

AU - Grønlund, Mette

AU - Jakobsen, Iver

AU - Hauggaard-Nielsen, Henrik

AU - Ahrenfeldt, Jesper

PY - 2015

Y1 - 2015

N2 - The return of residual products from bioenergy generation to soils is a step towards closing nutrient cycles, which is especially important for nutrients produced from non-renewable resources such as phosphorus (P). Low-temperature gasification is an innovative process efficiently generating energy from different biomass fuels, such as agricultural residues and waste streams, and at the same time producing a biochar product potentially valuable for soil amendment. In pot experiments, different residual products originating from low-temperature gasification were tested for their P-fertilizing potential with spring barley as a test crop. Biochar resulting from gasification of pure wheat straw showed the best P fertilizer value, however, because of the low P content, extremely high amounts had to be applied when crop P demand should be met, which came along with an over-fertilization of potassium (K). Gasification of pure sewage sludge with a high Fe and Al content practically eliminated its P fertilizer value, while co-gasification of sludge lower in Fe and Al together with wheat straw resulted in a biochar product with only somewhat reduced P availability and improved P/K ratio for fertilization purposes. Operationally defined P pools in soil obtained by sequential chemical extraction of the biochar-amended soils could be related to the observations made in the pot experiments. The results emphasize the potential of combining different feedstocks for thermal conversion processes when aiming at improving the usability of the residual products

AB - The return of residual products from bioenergy generation to soils is a step towards closing nutrient cycles, which is especially important for nutrients produced from non-renewable resources such as phosphorus (P). Low-temperature gasification is an innovative process efficiently generating energy from different biomass fuels, such as agricultural residues and waste streams, and at the same time producing a biochar product potentially valuable for soil amendment. In pot experiments, different residual products originating from low-temperature gasification were tested for their P-fertilizing potential with spring barley as a test crop. Biochar resulting from gasification of pure wheat straw showed the best P fertilizer value, however, because of the low P content, extremely high amounts had to be applied when crop P demand should be met, which came along with an over-fertilization of potassium (K). Gasification of pure sewage sludge with a high Fe and Al content practically eliminated its P fertilizer value, while co-gasification of sludge lower in Fe and Al together with wheat straw resulted in a biochar product with only somewhat reduced P availability and improved P/K ratio for fertilization purposes. Operationally defined P pools in soil obtained by sequential chemical extraction of the biochar-amended soils could be related to the observations made in the pot experiments. The results emphasize the potential of combining different feedstocks for thermal conversion processes when aiming at improving the usability of the residual products

M3 - Conference abstract for conference

ER -

Müller-Stöver DS, Jensen LS, Grønlund M, Jakobsen I, Hauggaard-Nielsen H, Ahrenfeldt J. Return of phosphorus in agricultural residues and urban sewage sludge to soil using biochar from low-temperature gasification as fertilizer product. 2015. Abstract fra Joint International Biochar Symposium 2015, Geisenheim, Tyskland.