title: Decomposition characteristics of humic-like matters with the hollow ellipsoid structure sludge inoculated from decayed soil in mature landfill leachate.
abstract: The organics in mature leachate are mainly humic-like matters, which account for over 80% weight of the total organics. In this work, the microorganisms in decayed soil were found to be capable of decomposing the humic-like matters evidently using an anaerobic-aerobic/anoxic bioprocess in two sequencing bio-reactors. The 3D excitation-emission matrix and Fourier transform infrared (FT-IR) were applied to characterize the variation of dissolved organic matters in mature leachate while sludge morphology was characterized by scanning electron microscopy. The intensities of fluorescence peaks A and C of leachate effluents were 71.66% and 48.75% lower than those of influents, respectively, which indicated the extraordinary degradation ability of microorganisms inoculated from the decayed soil. Meanwhile a kind of distinctive hollow ellipsoid structure sludge organized by tiny soil particles was observed, which might favour the humic-like matters' decomposition and has never been reported before as we know. The formation mechanisms of hollow ellipsoid structure sludge will need further study.
authors.affiliation: a The State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering , Tongji University , Shanghai 200092 , China.
authors.forename: Jie
authors.initials: J
authors.lastname: Zhang
authors.affiliation: a The State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering , Tongji University , Shanghai 200092 , China.
authors.forename: Sijie
authors.initials: S
authors.lastname: Lan
authors.affiliation: a The State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering , Tongji University , Shanghai 200092 , China.
authors.forename: Dongjie
authors.initials: D
authors.lastname: Niu
authors.affiliation: a The State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering , Tongji University , Shanghai 200092 , China.
authors.forename: Youcai
authors.initials: Y
authors.lastname: Zhao
mesh_terms: D019149:Bioreactors; D006812:Humic Substances; D012722:Sewage; D012988:Soil Microbiology; D017550:Spectroscopy, Fourier Transform Infrared; D014873:Water Pollutants / Q000378:metabolism
chemical_list: D006812:Humic Substances; D012722:Sewage; D014873:Water Pollutants
keywords: Mature landfill leachate; granule-like sludge; hollow ellipsoid sludge; humic-like matters; soil inoculation