Pig slurry acidification and separation techniques affect soil N and C turnover and N2O emissions from solid, liquid and biochar fractions

Beatriz Gomez Muñoz; Sean Case; Lars Stoumann Jensen

doi:10.1016/j.jenvman.2015.12.018

Pig slurry acidification and separation techniques affect soil N and C turnover and N₂O emissions from solid, liquid and biochar fractions

Beatriz Gomez Muñoz, Sean Case, Lars Stoumann Jensen

Section for Plant and Soil Sciences

11 Citations (Scopus)

Abstract

The combined effects of pig slurry acidification, subsequent separation techniques and biochar production from the solid fraction on N mineralisation and N2O and CO2 emissions in soil were investigated in an incubation experiment. Acidification of pig slurry increased N availability from the separated solid fractions in soil, but did not affect N2O and CO2 emissions. However acidification reduced soil N and C turnover from the liquid fraction. The use of more advanced separation techniques (flocculation and drainage > decanting centrifuge > screw press) increased N mineralisation from acidified solid fractions, but also increased N2O and CO2 emissions in soil amended with the liquid fraction. Finally, the biochar production from the solid fraction of pig slurry resulted in a very recalcitrant material, which reduced N and C mineralisation in soil compared to the raw solid fractions.

Original language	English
Journal	Journal of Environmental Management
Volume	168
Pages (from-to)	236-244
Number of pages	9
ISSN	0301-4797
DOIs	https://doi.org/10.1016/j.jenvman.2015.12.018
Publication status	Published - 1 Mar 2016

Keywords

Acids
Animals
Carbon
Charcoal
Gases
Nitrogen
Soil
Soil Pollutants
Swine
Journal Article
Research Support, Non-U.S. Gov't

Access to Document

10.1016/j.jenvman.2015.12.018

Cite this

@article{57e1a2ee09c54a3bbbde55532d92258a,

title = "Pig slurry acidification and separation techniques affect soil N and C turnover and N2O emissions from solid, liquid and biochar fractions",

abstract = "The combined effects of pig slurry acidification, subsequent separation techniques and biochar production from the solid fraction on N mineralisation and N2O and CO2 emissions in soil were investigated in an incubation experiment. Acidification of pig slurry increased N availability from the separated solid fractions in soil, but did not affect N2O and CO2 emissions. However acidification reduced soil N and C turnover from the liquid fraction. The use of more advanced separation techniques (flocculation and drainage > decanting centrifuge > screw press) increased N mineralisation from acidified solid fractions, but also increased N2O and CO2 emissions in soil amended with the liquid fraction. Finally, the biochar production from the solid fraction of pig slurry resulted in a very recalcitrant material, which reduced N and C mineralisation in soil compared to the raw solid fractions.",

keywords = "Acids, Animals, Carbon, Charcoal, Gases, Nitrogen, Soil, Soil Pollutants, Swine, Journal Article, Research Support, Non-U.S. Gov't",

author = "{Gomez Mu{\~n}oz}, Beatriz and Sean Case and Jensen, {Lars Stoumann}",

year = "2016",

month = mar,

day = "1",

doi = "10.1016/j.jenvman.2015.12.018",

language = "English",

volume = "168",

pages = "236--244",

journal = "Journal of Environmental Management",

issn = "0301-4797",

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TY - JOUR

T1 - Pig slurry acidification and separation techniques affect soil N and C turnover and N2O emissions from solid, liquid and biochar fractions

AU - Gomez Muñoz, Beatriz

AU - Case, Sean

AU - Jensen, Lars Stoumann

PY - 2016/3/1

Y1 - 2016/3/1

N2 - The combined effects of pig slurry acidification, subsequent separation techniques and biochar production from the solid fraction on N mineralisation and N2O and CO2 emissions in soil were investigated in an incubation experiment. Acidification of pig slurry increased N availability from the separated solid fractions in soil, but did not affect N2O and CO2 emissions. However acidification reduced soil N and C turnover from the liquid fraction. The use of more advanced separation techniques (flocculation and drainage > decanting centrifuge > screw press) increased N mineralisation from acidified solid fractions, but also increased N2O and CO2 emissions in soil amended with the liquid fraction. Finally, the biochar production from the solid fraction of pig slurry resulted in a very recalcitrant material, which reduced N and C mineralisation in soil compared to the raw solid fractions.

AB - The combined effects of pig slurry acidification, subsequent separation techniques and biochar production from the solid fraction on N mineralisation and N2O and CO2 emissions in soil were investigated in an incubation experiment. Acidification of pig slurry increased N availability from the separated solid fractions in soil, but did not affect N2O and CO2 emissions. However acidification reduced soil N and C turnover from the liquid fraction. The use of more advanced separation techniques (flocculation and drainage > decanting centrifuge > screw press) increased N mineralisation from acidified solid fractions, but also increased N2O and CO2 emissions in soil amended with the liquid fraction. Finally, the biochar production from the solid fraction of pig slurry resulted in a very recalcitrant material, which reduced N and C mineralisation in soil compared to the raw solid fractions.

KW - Acids

KW - Animals

KW - Carbon

KW - Charcoal

KW - Gases

KW - Nitrogen

KW - Soil

KW - Soil Pollutants

KW - Swine

KW - Journal Article

KW - Research Support, Non-U.S. Gov't

U2 - 10.1016/j.jenvman.2015.12.018

DO - 10.1016/j.jenvman.2015.12.018

M3 - Journal article

C2 - 26716355

SN - 0301-4797

VL - 168

SP - 236

EP - 244

JO - Journal of Environmental Management

JF - Journal of Environmental Management