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SYSTEMS TO ACCELERATE IN SITU STABILIZATION OF WASTE DEPOSITS
Citation:
Amdurer, M., R. Fellman, J. Roetzer, AND C. Russ. SYSTEMS TO ACCELERATE IN SITU STABILIZATION OF WASTE DEPOSITS. U.S. Environmental Protection Agency, Washington, D.C., EPA/540/2-86/002.
Description:
In-situ systems to accelerate the stabilization of waste deposits involve three essential elements: selection of a chemical or biological agent (reactant) which can react with and stabilize the waste, a method for delivery of the reactant to the deposit and a method for recovery of the reaction products or mobilized waste. Four reactant categories have been examined: biodegradation, surfactant-assistant flushing, hydrolysis, and oxidation. Of these, biodegradation and surfactant-assisted flushing appear most promising as in-situ treatment techniques. Methods of delivery of reactants based upon gravity include surface flooding, ponding, surface spraying, ditching, and subsurface infiltration beds and galleries. Forced injection (pumping) may also be used. Permeability is an important consideration in selecting the delivery system. Recovery systems using gravity include open ditching and buried drains, and pumped methods include wellpoint and deep well systems. Basically, the same limitations that apply to delivery systems are also true for recovery systems.