Nitrogen mineralisation and greenhouse gas emission from the soil application of sludge from reed bed mineralisation systems

TY - JOUR

T1 - Nitrogen mineralisation and greenhouse gas emission from the soil application of sludge from reed bed mineralisation systems

AU - Muñoz, Beatriz Gomez

AU - Larsen, J.D.

AU - Bekiaris, Georgios

AU - Scheutz, C

AU - Bruun, Sander

AU - Nielsen, S.

AU - Jensen, Lars Stoumann

N1 - Copyright © 2017 Elsevier Ltd. All rights reserved.

PY - 2017/12/1

Y1 - 2017/12/1

N2 - A sludge treatment reed bed system (STRB) is a technology used for dewatering and stabilising sewage sludge via assisted biological mineralisation, which creates a sludge residue suitable for use as fertiliser on agricultural land. We evaluated the effect of sludge residue storage time (stabilisation time) for three STRBs on soil N mineralisation and CO2 and N2O emissions in soil. The experiment revealed that the N mineralisation rate and emissions of CO2 and N2O decreased as a function of treatment time in the STRBs. Mixed sludge residue (sludge residue subjected to different treatment times) for the three STRBs resulted in N mineralisation rates similar to the sludge residue subjected to a shorter treatment time but lower N2O emissions similar to the values of the older sludge residue. This finding reveals that combining fresh and more stabilised sludge residue ensures high N availability and reduces N2O emissions when applied to land.

AB - A sludge treatment reed bed system (STRB) is a technology used for dewatering and stabilising sewage sludge via assisted biological mineralisation, which creates a sludge residue suitable for use as fertiliser on agricultural land. We evaluated the effect of sludge residue storage time (stabilisation time) for three STRBs on soil N mineralisation and CO2 and N2O emissions in soil. The experiment revealed that the N mineralisation rate and emissions of CO2 and N2O decreased as a function of treatment time in the STRBs. Mixed sludge residue (sludge residue subjected to different treatment times) for the three STRBs resulted in N mineralisation rates similar to the sludge residue subjected to a shorter treatment time but lower N2O emissions similar to the values of the older sludge residue. This finding reveals that combining fresh and more stabilised sludge residue ensures high N availability and reduces N2O emissions when applied to land.

KW - Journal Article

U2 - 10.1016/j.jenvman.2017.07.042

DO - 10.1016/j.jenvman.2017.07.042

M3 - Journal article

C2 - 28778006

SN - 0301-4797

VL - 203

SP - 59

EP - 67

JO - Journal of Environmental Management

JF - Journal of Environmental Management

IS - Part 1

ER -