期刊
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
卷 87, 期 -, 页码 128-137出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ibiod.2013.09.024
关键词
Co-composting sewage sludge-lignocelullosic waste; C/N and NH4+/NO3- ratios; Lipids; Fourier transform infrared spectroscopy (FTIR); Humification; Phytotoxicity
The co-composting of activated sludge and lignocellulosic waste (palm tree waste) was monitored to study the evolution of two mixtures, referred to as A (2/3 palm waste + 1/3 sludge) and B (1/2 palm waste + 112 sludge) for 6 mo. The biotransformation during the co-composting process was evaluated by physicochemical and spectroscopy analyses. The final composts exhibited a higher degree of decomposition than the controls as shown by a decrease of C/N and NH4+/NO3- ratios, and a 43% decrease in total lipid content. The decrease of aliphatic absorbance bands at 2964, 2922, and 2850 cm-1 and the increase of structure aromatic absorbance bands at 1514, 1426, and 1386 cm-1 reflect the progress of the humification process, which judging by the increase in the humification index, is about 60%. This efficiency of co-composting in reducing phytotoxicity was confirmed by the germination index, which reached over 90%, and by metallic trace element concentration. (C) 2013 Elsevier Ltd. All rights reserved.
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