Journal
WASTE MANAGEMENT
Volume 49, Issue -, Pages 545-552Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.wasman.2016.01.007
Keywords
Charcoal; Fulvic acid; Compost; Humic acid; Organic waste
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Funding
- Japan Society for the Promotion of Science
- CSIC (Consejo Superior de Investigaciones Cientificas)
- Fundacion Seneca (Murcia, Spain)
- Spanish Ministry of Economy and Competitiveness [AGL2012-40143-C02-01]
- government agency Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)
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Application of biochar (10% v/v) to a manure composting matrix was investigated to evaluate its effect on the chemical composition of humic substances during the composting process. The characteristics of the humic acid (HA) and fulvic acid (FA) fractions were analyzed in compost mixtures originating from two different manures (poultry manure (PM) and cow manure (CM)). The C contents of HA and FA from the manure compost/biochar blends (PM+B and CM+B) were higher than those from PM and CM, with an enhanced recalcitrant fraction, as determined by thermogravimetric analysis. Spectroscopic analysis showed that enrichment of aromatic C and carboxylic-C occurred in the FA fractions of PM+B and CM +B to a greater extent than in PM and CM. Biochar addition into the composting mixture improved the final compost quality, especially for the light humified fraction (FA). (C) 2016 Elsevier Ltd. All rights reserved.
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