CUED Publications database

A dual-permeability hydro-biodegradation model for leachate recirculation and settlement in bioreactor landfills

Feng, SJ and Bai, ZB and Chen, HX and Cao, BY and Lu, SF and Chen, YM (2018) A dual-permeability hydro-biodegradation model for leachate recirculation and settlement in bioreactor landfills. Environmental Science and Pollution Research, 25. pp. 14614-14625. ISSN 0944-1344

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Abstract

© 2018, Springer-Verlag GmbH Germany, part of Springer Nature. A dual-permeability hydro-biodegradation model is developed to describe the leachate flow in municipal solid waste (MSW) and predict the long-term settlement induced by biodegradation in bioreactor landfills. The model is verified against Hydrus-1D and a recirculation experiment conducted in a full-scale landfill. Preferential flow and mass transfer between fissure and matrix can be reasonably modeled by the proposed model. A higher recirculation flow rate can speed up the stabilization process of landfill. However, too much recirculation leachate is not economical and environmental friendly. A stabilization speed index and a leachate utilization index are adopted to evaluate the stabilization speed of bioreactor landfill and utilization rate of leachate, respectively, and the optimal recirculation flow rate is estimated. A flow rate of q = 5 × 10−5–5 × 10−4 m/h (equivalent to recirculation intensity of Q = 15–150 L/tonwaste/year) is recommended for recirculation, which has been verified by the field data in numerous bioreactor landfills.

Item Type: Article
Uncontrolled Keywords: Biodegradation Bioreactor landfill Dual-permeability model Recirculation Settlement Biodegradation, Environmental Bioreactors Models, Theoretical Permeability Refuse Disposal Solid Waste Waste Disposal Facilities Water Pollutants, Chemical
Subjects: UNSPECIFIED
Divisions: Div D > Geotechnical and Environmental
Depositing User: Cron Job
Date Deposited: 09 May 2018 20:10
Last Modified: 17 Sep 2020 02:27
DOI: 10.1007/s11356-018-1690-2