Characterization of organic matter from composting of different residues by physicochemical and spectroscopic methods

• DOI: 10.1016/j.biortech.2009.10.039
• Publication Date: 2009-12-02T10:12:04Z
• Authors: Lucimar Lopes Fialho; Wilson Tadeu Lope...; Débora M.B.P. Milori; Marcelo Luiz Simões; Ladislau Martin-Neto
• Keywords: Pomace; Residue (chemistry)

Chemical and spectroscopic methods were used to characterize organic matter transformations during the composting process. Four different residue mixtures studied: P1--garden trimmings (GT) only, P2 - GT plus fresh cattle manure, P3--GT orange pomace P4--GT filter cake. The thermophilic phase was not reached in P1 compost, but P2, P3 P4 composts showed all three typical process phases. CEC/C ratio stabilized after 90 days, while C/N ash content 60 days. increasing E(4)/E(6) indicated oxidation reactions occurring material from P4. (13)C NMR FTIR results suggested extraction of both pectin lignin HA-like fraction. ratio, temperature that within days humified. However, did show characteristics humified compost. From these data, it is apparent are reliable for monitoring