Abstract：
:Wood biochar (6%, 12% and 18% of fresh sludge weight) adding to a sludge-and-straw composting system was investigated to assess the potential of biochar as a composting amendment. Organic degradation efficiency, temporal humification profile of the water-extractable organic fraction and solid organic matter, through spectroscopic, microscopic and elementary analysis were monitored. Fluorescent excitation and emission matrix indicated that concentrations of aqueous fulvic-acid-like and humic-acid-like compounds were, respectively, 13-26% and 15-30% higher in the biochar-amended treatments, than those in the control without biochar-amended. On the first day of sludge aerobic incubation, the presence of biochar resulted in increased oxygen uptake rates of 21-37% due to its higher nano-porosity and surface area. SEM indicated that, in the biochar-amended sludge, the dense microstructure on the sludge surface disintegrated into fragments with organic fraction degraded and water lost. Results indicated that 12-18%w/w addition of wood biochar to sludge composting was recommended.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Zhang J,Lü F,Shao L,He Pdoi
10.1016/j.biortech.2014.02.080subject
Has Abstractpub_date
2014-09-01 00:00:00pages
252-8eissn
0960-8524issn
1873-2976pii
S0960-8524(14)00251-Xjournal_volume
168pub_type
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