Effect of Enhanced Biodegradation on Settlement of Municipal Solid Waste Landfills
نویسنده
چکیده
Recent studies of municipal solid waste landfills have revealed the influence of biodegradation upon secondary settlement. Modern landfills, however, are designed with efficient containment systems which minimise moisture ingress and thereby reduce leachate and gas generation. The shortage of moisture means that these containment systems delay decomposition and stabilisation of waste. An alternative approach is to enhance biodegradation by designing and operating landfills as bioreactors. Leachate and gas are then produced during the early stages when the containment system is new and risk of failure is low. Additionally, accelerated stabilisation allows earlier re-use of the site. This paper describes an investigation conducted in a full-scale bioreactor cell at the Lyndhurst Landfill in Victoria, Australia, to demonstrate the effect of enhanced biodegradation upon secondary settlement. A hyperbolic settlement model is used to quantify the acceleration of settlement due to enhanced biodegradation and to predict the continuing settlement-time relationship.
منابع مشابه
Modeling of leachate recirculation using vertical wells in bioreactor landfills.
Leachate recirculation (LR) in municipal solid waste (MSW) landfills operated as bioreactors offers significant economic and environmental benefits. The subsurface application method of vertical wells is one of the most common LR techniques. The objective of this study was to develop a novel two-dimensional model of leachate recirculation using vertical wells. This novel method can describe lea...
متن کاملA Coupling Kinetics Model for Pollutant Release and Transport in the Process of Landfill Settlement
A coupling kinetics model is developed to simulate the release and transport of landfill leachate pollutants in a deformable municipal solid waste landfill by taking into account of landfill settlement, seepage of leachate water, hydrolyse of insoluble and degradable organic pollutants in solid phase, biodegradation of soluble and degradable organic pollutants in solid phase and aqueous one, gr...
متن کاملApproach for the use of MSW settlement predictions in the assessment of landfill capacity based on reliability analysis.
In the analysis and design of municipal solid waste (MSW) landfills, there are many uncertainties associated with the properties of MSW during and after MSW placement. Several studies are performed involving different laboratory and field tests to understand the complex behavior and properties of MSW, and based on these studies, different models are proposed for the analysis of time dependent s...
متن کاملModelling for environmental assessment of municipal solid waste landfills (part II: biodegradation).
The biodegradation module of a simulation program for municipal solid waste landfills (MODUELO) was developed. The biodegradation module carries out the balance of organic material starting with the results of the hydrologic simulation and the waste composition. It simulates the biologic reactions of hydrolysis of solids and the gasification of the dissolved biodegradable material. The results ...
متن کاملMethane Production from Municipal Solid Waste
Introduction Archaeological investigations of landfills have revealed that biodegradable wastes can be found — virtually intact — 25 years after burial. We know that landfills contain bacteria with the metabolic capability to degrade many of the materials that are common components of municipal refuse. The persistence for decades of degradable materials in the presence of such organisms appears...
متن کامل