Co-composting solid biowastes with alkaline materials to enhance carbon stabilization and revegetation potential
2014
Chowdhury, Saikat | Bolan, Nanthi S. | Seshadri, Balaji | Kunhikrishnan, Anitha | Wijesekara, Hasintha | Xu, Yilu | Yang, Jianjun | Kim, Geon-Ha | Sparks, Donald | Rumpel, Cornelia | Hannam University | Global Centre for Environmental Research (GCER) ; University of Newcastle (UoN) | University of Newcastle (UoN) | National Academy of Agricultural Science | Univ S Australia, CERAR, Adelaide, SA 5095, Australia ; Partenaires INRAE | University of Delaware [Newark] | Institut d'écologie et des sciences de l'environnement de Paris (iEES) ; Institut National de la Recherche Agronomique (INRA)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS) | Consortium on Health, Environment, Education & Research (CHEER). Hong-Kong, CHN.
International audience
Afficher plus [+] Moins [-]anglais. Co-composting biowastes such as manures and biosolids can be used to stabilize carbon (C) without impacting the quality of these biowastes. This study investigated the effect of co-composting biowastes with alkaline materials on C stabilization and monitored the fertilization and revegetation values of these co-composts. The stabilization of C in biowastes (poultry manure and biosolids) was examined by their composting in the presence of various alkaline amendments (lime, fluidized bed boiler ash, flue gas desulphurization gypsum, and red mud) for 6 months in a controlled environment. The effects of co-composting on the biowastes' properties were assessed for different physical C fractions, microbial biomass C, priming effect, potentially mineralizable nitrogen, bioavailable phosphorus, and revegetation of an urban landfill soil. Co-composting biowastes with alkaline materials increased C stabilization, attributed to interaction with alkaline materials, thereby protecting it from microbial decomposition. The co-composted biowastes also increased the fertility of the landfill soil, thereby enhancing its revegetation potential. Stabilization of biowastes using alkaline materials through co-composting maintains their fertilization value in terms of improving plant growth. The co-composted biowastes also contribute to long-term soil C sequestration and reduction of bioavailability of heavy metals.
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