Abstract
The assessment of maturity and biological parameters is important in the composting process. In this study, excitation–emission matrix (EEM) fluorescence spectroscopy was applied to evaluate the maturity and biological parameters of compost produced from the co-composting of dairy and rice chaff. The results from a Pearson correlation analysis between traditional physico-chemical maturity indices and fluorescence regional integration (FRI) parameters showed that among the FRI parameters, PV,n/PIII,n and PV,n were suitable for the assessment of compost maturity. Moreover, the FRI parameters could be used to evaluate biological parameters including the germination index (GI) and ribotype evolution which indicate the bacterial community structure and dynamics. PIV,n was the most suitable indicator for revealing the community structure and dynamics during the composting process. Fluorescence spectroscopy combined with the FRI analysis could be used as a sensitive and efficient tool for assessing compost maturity and biological parameters.
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