TY - JOUR
T1 - Potential reuse of domestic organic residues as soil organic amendment in the current waste management system in Australia, China, and The Netherlands
AU - Liu, Jiyao
AU - de Haan, Jesse
AU - Montaño Rey, Iván Felipe
AU - Bai, Zhanguo
AU - Chen, Wei Shan
AU - van Eekert, Miriam H.A.
AU - Buisman, Cees J.N.
PY - 2023/10/15
Y1 - 2023/10/15
N2 - Soil organic carbon (SOC) is essential for most soil functions. Changes in land use from natural land to cropland disrupt long-established SOC balances and reduce SOC levels. The intensive use of chemical fertilisers in modern agriculture accelerates the rate of SOC depletion. Domestic organic residues (DOR) are a valuable source of SOC replenishment with high carbon content. However, there is still a lack of knowledge and data regarding whether and to what extent DOR can contribute to replenishing SOC. This paper aims to unpack the potential of DOR as a SOC source. Total SOC demand and annual SOC loss are defined and calculated. The carbon flow within different DOR management systems is investigated in three countries (China, Australia, and The Netherlands). The results show that the total SOC demand is too large to be fulfilled by DOR in a short time. However, DOR still has a high potential as a source of SOC as it can mitigate the annual SOC loss by up to 100%. Achieving this 100% mitigation requires a shift to more circular management of DOR, in particular, more composting, and direct land application instead of landfilling and incineration (Australia and China), or a higher rate of source separation of DOR (The Netherlands). These findings form the basis for future research on DOR recycling as a SOC source.
AB - Soil organic carbon (SOC) is essential for most soil functions. Changes in land use from natural land to cropland disrupt long-established SOC balances and reduce SOC levels. The intensive use of chemical fertilisers in modern agriculture accelerates the rate of SOC depletion. Domestic organic residues (DOR) are a valuable source of SOC replenishment with high carbon content. However, there is still a lack of knowledge and data regarding whether and to what extent DOR can contribute to replenishing SOC. This paper aims to unpack the potential of DOR as a SOC source. Total SOC demand and annual SOC loss are defined and calculated. The carbon flow within different DOR management systems is investigated in three countries (China, Australia, and The Netherlands). The results show that the total SOC demand is too large to be fulfilled by DOR in a short time. However, DOR still has a high potential as a source of SOC as it can mitigate the annual SOC loss by up to 100%. Achieving this 100% mitigation requires a shift to more circular management of DOR, in particular, more composting, and direct land application instead of landfilling and incineration (Australia and China), or a higher rate of source separation of DOR (The Netherlands). These findings form the basis for future research on DOR recycling as a SOC source.
KW - Cropland
KW - Domestic organic residue
KW - Kitchen residue
KW - Organic carbon
KW - Soil organic carbon
KW - Wastewater treatment sludge
U2 - 10.1016/j.jenvman.2023.118618
DO - 10.1016/j.jenvman.2023.118618
M3 - Article
C2 - 37459813
AN - SCOPUS:85165117296
SN - 0301-4797
VL - 344
JO - Journal of Environmental Management
JF - Journal of Environmental Management
M1 - 118618
ER -