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RISSensitivity Analyses of Biodegration/Adsorption Models
Publisher: American Society of Civil Engineers
Abstract: The research was directed toward additional development and refinement of mathematical models of simultaneous adsorption and biodegradation in granular activated carbon (GAC) columns used in the treatment of low concentrations ...
Chlorinated Solvent Biodegradation by Methanotrophs in Unsaturated Soils
Publisher: American Society of Civil Engineers
Abstract: Chlorinated aliphatic solvents arc common contaminants of unsaturated soils. This research focuses on the feasibility of treatment by
Adsorption of RDX and HMX in Rapid Small-Scale Column Tests: Implications for Full-Scale Adsorbers
Publisher: American Society of Civil Engineers
Abstract: The high explosive (HE) compounds royal demolition explosive or hexahydro-1,3,5-trinitro-1,3,5-triazocine (RDX) and high melting explosive or octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX) have been detected as ...
Removal of Perfluorooctanoic Acid and Perfluorooctane Sulfonate from Wastewater by Ion Exchange
Publisher: American Society of Civil Engineers
Abstract: Recent studies have demonstrated that fully fluorinated surfactant molecules have a tendency to accumulate in biological tissues. As a result, the Environmental Protection Agency has sought to reduce the usage of these ...
Biofilm Reactors for Treatment of Gas Streams Containing Chlorinated Solvents
Publisher: American Society of Civil Engineers
Abstract: Air streams contaminated with chlorinated solvents are increasingly common as by‐products of air‐stripping and soil‐vapor‐extraction operations. This research investigated treatment of such gas streams with a bioreactor ...
Niche for Steam Stripping in Treating Dilute SOC-Contaminated Waters
Publisher: American Society of Civil Engineers
Abstract: As regulatory limits for contaminants in air and water become increasingly stringent, interest in steam stripping to remove synthetic organic compounds (SOCs) from industrial waters has increased. To identify situations ...
Biofilm Shearing under Dynamic Conditions
Publisher: American Society of Civil Engineers
Abstract: Experimental data on biofilm shearing were collected for columns packed with granular activated carbon. The columns were operated under dynamic conditions, experiencing a wide range of biodegradation rates. Under conditions ...
Mathematical Modeling of Bioregeneration in GAC Columns
Publisher: American Society of Civil Engineers
Abstract: A mathematical model of simultaneous adsorption and biodegradation in beds of sorptive media is developed and tested. The model considers a single substrate; it describes adsorption by the Fruendlich isotherm and surface ...
Removal of Nonbiodegradable Chemicals from Mixtures during Granular Activated Carbon Bioregeneration
Publisher: American Society of Civil Engineers
Abstract: The purpose of this research was to better understand the interactions between biodegradable and nonbiodegradable synthetic organic chemicals (SOCs) during bioregeneration of biologically active granular activated carbon ...