Characterization of water-extractable organic matter during the biostabilization of municipal solid waste.
For the purpose of characterizing the evolution of water-extractable organic matter (WEOM) during the biostabilization of municipal solid waste (MSW) and investigating the correlation between biostability and WEOM characteristics, this study conducted 100-day investigation on biostabilization of MSW and applied various analytical approaches to characterize WEOM. The results showed that the respirometric activity of MSW was reduced by 93% to 10.7 mg kg(-1), and the dissolved organic carbon concentration of WEOM kept steady at around 4.0 g kg(-1) after day 44, when the MSW was considered to be stabilized. Moreover, the aromaticity of WEOM significantly increased and the high-molecular weight fraction became the main part of WEOM. Being highly related to the biostability of MSW, the excitation-emission matrix spectra indicated the stability by the fluorescence regional integration technique either by the presence of specific Ex/Em maxima (with wavelength pair of approximately 288/455) or by the rapid increase of normalized excitation-emission area volumes with respect to the humic substances.
Shao
Zheng-Hao
ZH
State Key Laboratory of Pollution Control and Resources Reuse, Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, Shanghai, PR China.
He
Pin-Jing
PJ
Zhang
Dong-Qing
DQ
Shao
Li-Ming
LM
D002244:Carbon / Q000032:analysis; D002947:Cities; D005470:Fluorometry; D006812:Humic Substances / Q000032:analysis*; D006841:Hydrocarbons, Aromatic / Q000032:analysis; D008970:Molecular Weight; D014865:Waste Disposal, Fluid / Q000379:methods*; D014867:Water / Q000737:chemistry
D006812:Humic Substances; D006841:Hydrocarbons, Aromatic; D014867:Water; D002244:Carbon