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Characterization of decomposition products from organic sludges after different digestion times in different media



Characterization of decomposition products from organic sludges after different digestion times in different media



Revista Brasileira de Ciencia do Solo 21(1): 1-8



The humification of organic residues from the cellulose industry and the resulting decomposition products were studied in samples taken periodically over a 9-month period from six different anaerobic biodigesters. Addition of protein, lime and amino acids stimulated the digestion process, the addition of protein increasing the yield of humic (HA) and fulvic (FA) acids. Contents of C, H, N and O in the HA fraction were similar to those in soil humic acids. The C:N ratio varied from 10 to 14.

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