Effects of Bonded Tyres on Leachate Recirculation of Bioreactor Landfills

Results and Conclusion: In this study, a numerical two-permeability flow model was used to investigate the effects of tyres embedding on the outflow rate of leachate injection. Furthermore, it was coupled with momentum balance equations to determine the local factor of safety of slope stability. The established model was applied to a simplified bioreactor landfill. The simulation results demonstrated that the tyre net can accelerate the rate of leachate injection and contribute to distribute the liquid more uniformly. Meanwhile, the slope stability was improved due to the enforcement of waste in the presence of tyres.

[1]  Horst H. Gerke,et al.  Evaluation of a first-order water transfer term for variably saturated dual-porosity flow models , 1993 .

[2]  Rajiv K. Giri,et al.  Design of horizontal trenches for leachate recirculation in bioreactor landfills using two-phase modelling , 2015 .

[3]  Thom Bogaard,et al.  How to Use COMSOL Multiphysics for Coupled Dual-permeability Hydrological and Slope Stability Modeling , 2014 .

[4]  Shi-Jin Feng,et al.  Modeling of leachate recirculation using vertical wells in bioreactor landfills , 2015, Environmental Science and Pollution Research.

[5]  Philip T. McCreanor.  Landfill leachate recirculation systems : mathematical modeling and validation , 1998 .

[6]  Philip T. McCreanor,et al.  The Bioreactor Landfill: Its Status and Future , 2003 .

[7]  Bhavna Arora,et al.  Inverse estimation of parameters for multidomain flow models in soil columns with different macropore densities , 2011, Water resources research.

[8]  Krishna R. Reddy,et al.  Two-Phase Modeling of Leachate Recirculation Using Drainage Blankets in Bioreactor Landfills , 2015, Environmental Modeling & Assessment.

[9]  A. Cabral,et al.  Behaviour of tire shred - sand mixtures , 2004 .

[10]  N. Janbu,et al.  Slope stability computations : In Embankment-dam Engineering. Textbook. Eds. R.C. Hirschfeld and S.J. Poulos. JOHN WILEY AND SONS INC., PUB., NY, 1973, 40P , 1975 .

[11]  Fan Yang,et al.  The impact of compaction and leachate recirculation on waste degradation in simulated landfills. , 2016, Bioresource technology.

[12]  Ning Lu,et al.  Analysis of rainfall‐induced slope instability using a field of local factor of safety , 2012 .

[13]  Krishna R. Reddy,et al.  Slope Stability of Bioreactor Landfill with Leachate Recirculation using Horizontal Trench System , 2014 .

[14]  M. V. Genuchten,et al.  Mass transfer studies in sorbing porous media. I. Analytical solutions , 1976 .

[15]  Timothy G. Townsend,et al.  Sustainable Practices for Landfill Design and Operation , 2015, Waste Management Principles and Practice.

[16]  M. V. Genuchten,et al.  A dual-porosity model for simulating the preferential movement of water and solutes in structured porous media , 1993 .

[17]  M. V. Genuchten,et al.  Macroscopic representation of structural geometry for simulating water and solute movement in dual-porosity media , 1996 .

[18]  Milind V. Khire,et al.  Leachate Recirculation Using Horizontal Trenches in Bioreactor Landfills , 2005 .

[19]  Krishna R. Reddy,et al.  Slope stability of bioreactor landfills during leachate injection: Effects of geometric configurations of horizontal trench systems , 2015 .

[20]  Jean E. Bogner.  Landfill bioreactor design and operation Debra R. Reinhart and Timothy G. Townsend, Lewis Publishers, Boca Raton, FL, (1998), 189 pages, [ISBN No.: 1–56670–259–3] U.S. List Price $69.95 , 1998 .

[21]  Poul V. Lade,et al.  Closure of "Static Instability and Liquefaction of Loose Fine Sandy Slopes" , 1993 .

[22]  Ning Lu,et al.  Suction Stress Characteristic Curve for Unsaturated Soil , 2006 .

[23]  John McDougall,et al.  Unsaturated Hydraulic Conductivity of Landfilled Waste , 2006 .

[24]  Krishna R. Reddy,et al.  Geoenvironmental Engineering: Site Remediation, Waste Containment, and Emerging Waste Management Technologies , 2004 .

[25]  N. Morgenstern,et al.  The analysis of the stability of general slip surfaces , 1965 .

[26]  Shi-Jin Feng,et al.  Modeling of Leachate Recirculation Using Spraying–Vertical Well Systems in Bioreactor Landfills , 2017 .

[27]  M. V. Genuchten,et al.  Mass Transfer Studies in Sorbing Porous Media: II. Experimental Evaluation with Tritium (3H2O)1 , 1977 .

[28]  Milind V. Khire,et al.  Two-Phase Modeling of Leachate Recirculation Using Vertical Wells in Bioreactor Landfills , 2013 .

[29]  D. Fredlund,et al.  Comparison of slope stability methods of analysis , 1977 .

[30]  Robert K. Ham,et al.  Microbial, Chemical and Methane Production Characteristics of Anaerobically Decomposed Refuse With and Without Leachate Recycling , 1992 .

[31]  Milind V. Khire,et al.  Leachate Recirculation Using Permeable Blankets in Engineered Landfills , 2007 .

[32]  Timothy G Townsend,et al.  Steady-state design of vertical wells for liquids addition at bioreactor landfills. , 2010, Waste management.

[33]  Milind V. Khire,et al.  Leachate Recirculation Using Geocomposite Drainage Layer in Engineered MSW Landfills , 2005 .

[34]  Jeffrey J. McDonnell,et al.  Lateral subsurface stormflow and solute transport in a forested hillslope: A combined measurement and modeling approach , 2014 .

[35]  J. M. Duncan,et al.  Soil Strength and Slope Stability , 2005 .

[36]  Radoslaw L. Michalowski,et al.  Stability Charts for Uniform Slopes , 2002 .

[37]  W. Clarke,et al.  Effect of recirculated leachate volume on MSW degradation , 1998 .

[38]  Albert J. Valocchi,et al.  An improved dual porosity model for chemical transport in macroporous soils , 1997 .

[39]  Timothy G. Townsend,et al.  Impact of Pressurized Liquids Addition on Landfill Slope Stability , 2012 .

[40]  A. Bishop.  The use of the Slip Circle in the Stability Analysis of Slopes , 1955 .

[41]  Krishna R. Reddy,et al.  GEOTECHNICAL ASPECTS OF BIOREACTOR LANDFILLS , 2006 .