Potential of biochar in composting: Effect on process performance and greenhouse gas emissions

C. Mondini, T. Sinicco, B. Vandecasteele, T. D'Hose

    Onderzoeksoutput: Bijdrage aan tijdschriftA2: Artikel in een internationaal wetenschappelijk tijdschrift met peer review, dat niet inbegrepen is in A1

    Uittreksel

    The aim of this study was the evaluation of biochar as a means of improving the performance of the composting process and the quality of the end product. For this purpose, oak biochar was added at a rate of 10% dry weight to a 50:50 mixture of green waste and the organic fraction of municipal solid waste in a full-scale composting process. The main improvements caused by biochar addition were an enhanced rate of organic matter (OM) decomposition during the bio-oxidative phase of the process (OM losses of 21 and 11% for feedstocks with or without biochar, respectively), without affecting the total OM loss at the end of the process, a significant reduction of N losses (3 and 22% of initial N for compost with or without biochar, respectively) and a larger amount of easily available P (17.4 vs. 14.9 mg L-1 for compost with or without biochar, respectively). Biochar caused a reduction or no effect on greenhouse gas (GHG) emissions, depending on the specific gas and conditions of the composting process. The results indicate that adding biochar to the feedstock mixture before composting represents an effective improvement to the traditional composting system, especially in the case of N-rich organic wastes, as it may reduce the process costs and GHG emissions, without affecting the quality of the end product.
    TaalEngels
    TijdschriftActa Horticulturae
    Pagina's (van-tot)251-256
    Aantal pagina's6
    ISSN0567-7572
    DOI's
    StatusGepubliceerd - 21-nov-2016

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