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STEADY-STATE DESIGN OF VERTICAL WELLS FOR LIQUIDS ADDITION AT BIOREACTOR LANDFILLS
Citation:
Jain, P., T. G. Townsend, AND T. M. TOLAYMAT. STEADY-STATE DESIGN OF VERTICAL WELLS FOR LIQUIDS ADDITION AT BIOREACTOR LANDFILLS. WASTE MANAGEMENT. Elsevier Science Ltd, New York, NY, 30(11):2022-2029, (2010).
Impact/Purpose:
To present a series of design charts, that a design engineer can use, for designing a vertical well system for liquids addition at bioreactor landfills.
Description:
This paper presents design charts that a landfill engineer can use for the design of a vertical well system for liquids addition at bioreactor landfills. The flow rate and lateral and vertical zones of impact of a vertical well were estimated as a function of input variables such as waste properties (porosity, hydraulic conductivity, anisotropy ratio), well dimensions (radius and screen length), injection pressure, and volume of moisture added based on numerical modeling of fluid flow in saturated-unsaturated porous media. The flow rate, lateral and vertical zones of impact of a well, injection pressure, and volume of liquids added were normalized with the waste properties and well dimensions to formulate dimensionless variables. A series of design charts were created to present dimensionless flow rate, and lateral and vertical zones of impact as a function of dimensionless input variables. Several example problems are provided to illustrate the use of the design charts. The analysis and presentation of the design variables in terms of dimensionless variables not only extended the applicability of the simulation results to conditions beyond those used for simulations but also reduced the number of simulations needed to cover the range of conditions encountered for vertical well liquids addition systems.
