TY - JOUR
T1 - Characterization of digestate composting stability using fluorescence EEM spectroscopy combining with PARAFAC
AU - Huang, Jing
AU - Han, Lujia
AU - Huang, Guangqun
PY - 2019/5/1
Y1 - 2019/5/1
N2 - A laboratory scale experiment of digestate composting was carried out using a reactor system. In this study, conventional physicochemical and biological analyses were carried out and fluorescence excitation-emission matrix (EEM) spectroscopy combined with parallel factor analysis (PARAFAC) was used to assess the maturity and stability during digestate composting. A four-component model was obtained and three components, i.e. fulvic-like (C1 and C3), protein-like (C2), and humic-like (C4) components, were identified. Furthermore, the ratios of each two components were calculated and the relationships with other parameters were established using Pearson correlation analysis. The results showed that the main humification process during digestate composting was the accumulation of fulvic-like substances and that secondary formation occurred at the late stage of digestate composting. Moreover, the EEM–PARAFAC technique could be used as a sensitive and efficient tool for assessing the dynamic changes of digestate composting. The ratio C4/(C1 + C3) is the most suitable indicator in evaluating the stability of digestate composting.
AB - A laboratory scale experiment of digestate composting was carried out using a reactor system. In this study, conventional physicochemical and biological analyses were carried out and fluorescence excitation-emission matrix (EEM) spectroscopy combined with parallel factor analysis (PARAFAC) was used to assess the maturity and stability during digestate composting. A four-component model was obtained and three components, i.e. fulvic-like (C1 and C3), protein-like (C2), and humic-like (C4) components, were identified. Furthermore, the ratios of each two components were calculated and the relationships with other parameters were established using Pearson correlation analysis. The results showed that the main humification process during digestate composting was the accumulation of fulvic-like substances and that secondary formation occurred at the late stage of digestate composting. Moreover, the EEM–PARAFAC technique could be used as a sensitive and efficient tool for assessing the dynamic changes of digestate composting. The ratio C4/(C1 + C3) is the most suitable indicator in evaluating the stability of digestate composting.
KW - composting
KW - Digestate
KW - excitation-emission matrix spectroscopy
KW - fluorescence
KW - parallel factor analysis
UR - http://www.scopus.com/inward/record.url?scp=85061787837&partnerID=8YFLogxK
U2 - 10.1177/0734242X19828181
DO - 10.1177/0734242X19828181
M3 - Journal article
C2 - 30770032
AN - SCOPUS:85061787837
SN - 0734-242X
VL - 37
SP - 486
EP - 494
JO - Waste Management and Research
JF - Waste Management and Research
IS - 5
ER -