Abstract
Composting technology is used to treat chicken manure in this study, and the dynamic change of the thermal, optical properties and the elemental composition of humic acid (HA) are systemically studied in the process of composting. Results showed that the medium exothermic peak temperature and the high exothermic peak temperature of HA are gradually increased with the prolonging of composting time, and weight loss also increased significantly at high exothermic peak. Infrared spectral analysis indicated that HA molecules such as polysaccharides, lipids, and other small molecule compounds decreased, while the aromatic compounds increased. The change of hue coefficient (ΔlgK) showed that HA molecular weight is relatively small even in the late composting and there is further stabilized potential. The H/C of HA molecules decreasing tendency further confirms that composting is conducive to higher degree of condensation of HA and further complicated molecular structure, which can promote the HA maturation.
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Acknowledgements
This research was funded by National Basic Research Program of China (973 Program) (No. 2011CB100503) and National Natural Science Foundation of China (NSFC) (40971141).
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© 2013 Zhejiang University Press and Springer Science+Business Media Dordrecht
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Wang, Y., Dou, S., Zhang, J. (2013). Studies on Dynamic Change of Humic Acid in Chicken Manure Composting. In: Xu, J., Wu, J., He, Y. (eds) Functions of Natural Organic Matter in Changing Environment. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-5634-2_26
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DOI: https://doi.org/10.1007/978-94-007-5634-2_26
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