title: Relationship between anaerobic digestion of biodegradable solid waste and spectral characteristics of the derived liquid digestate.
abstract: The evolution of spectral properties during anaerobic digestion (AD) of 29 types of biodegradable solid waste was investigated to determine if spectral characteristics could be used for assessment of biological stabilization during AD. Biochemical methane potential tests were conducted and spectral indicators (including the ratio of ultraviolet-visible absorbance at 254nm to dissolved organic carbon concentration (SUVA254), the ratio of ultraviolet-visible absorbance measured at 465nm and 665nm (E4/E6), and the abundance of fluorescence peaks) were measured at different AD phases. Inter-relationship between organic degradation and spectral indicators were analyzed by principle component analysis. The results shows that from methane production phase to the end of methane production phase, SUVA254 increased by 0.16-10.93 times, the abundance of fulvic acid-like compounds fluorescence peak increased by 0.01-0.54 times, the abundance of tyrosine fluorescence peak decreased by 0.03-0.64 times. Therefore, these indicators were useful to judge the course of mixed waste digestion.
authors.affiliation: State Key Laboratory of Pollution Control & Resource Reuse, Tongji University, Shanghai 200092, PR China; Institute of Waste Treatment and Reclamation, Tongji University, Shanghai 200092, PR China.
authors.forename: Wei
authors.initials: W
authors.lastname: Zheng
authors.affiliation: State Key Laboratory of Pollution Control & Resource Reuse, Tongji University, Shanghai 200092, PR China; Institute of Waste Treatment and Reclamation, Tongji University, Shanghai 200092, PR China. Electronic address: lvfan.rhodea@tongji.edu.cn.
authors.forename: Fan
authors.initials: F
authors.lastname: Lü
authors.affiliation: State Key Laboratory of Pollution Control & Resource Reuse, Tongji University, Shanghai 200092, PR China; Institute of Waste Treatment and Reclamation, Tongji University, Shanghai 200092, PR China.
authors.forename: Khamphe
authors.initials: K
authors.lastname: Phoungthong
authors.affiliation: Institute of Waste Treatment and Reclamation, Tongji University, Shanghai 200092, PR China; Centre for the Technology Research and Training on Household Waste in Small Towns & Rural Area, Ministry of Housing and Urban-Rural Development (MOHURD), PR China.
authors.forename: Pinjing
authors.initials: P
authors.lastname: He
mesh_terms: D000693:Anaerobiosis; D001673:Biodegradation, Environmental; D005735:Garbage; D008697:Methane / Q000032:analysis; D025341:Principal Component Analysis; D013057:Spectrum Analysis; D014866:Waste Products / Q000032:analysis*
chemical_list: D014866:Waste Products; D008697:Methane
keywords: Biplot; Fabric; Food waste; Humification; Lignocellulose waste