Practice Periodical of Hazardous, Toxic, and Radioactive Waste Management: Recent submissions
Now showing items 181-200 of 519
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Isolation, Characterization, and Identification of Bacteria from Activated Sludge and Soluble Microbial Products in Wastewater Treatment Systems
(American Society of Civil Engineers, 2007)Activated sludge process is the most widely used technology for municipal and industrial wastewater treatment. The microbial community of activated sludge is a mixed population of microorganisms containing many species of ... -
Disinfection Processes and Stability Refinements to Biosolids Treatment Technologies
(American Society of Civil Engineers, 2008)This paper reviews the current United States sewage sludge disinfection regulations and their associated practices; discusses the limitations of the practices; the criteria employed in evaluating a new (innovative or ... -
Mathematical Modeling and Simulation of Ocean Disposal of Harbor Dredged Materials
(American Society of Civil Engineers, 2007)Ocean disposal of wastes such as dredged materials causes the concentrations of contaminants and some other water quality parameters in the water column to change. In this study, the STFATE (short-term Fate) system, a model ... -
Degradation of Microcystin-LR through Biological Sand Filters
(American Society of Civil Engineers, 2007)Cyanobacteria are a global problem as they are able to produce compounds which can compromise the quality of potable water. Of major concern are the microcystin toxins which in dissolved form are not well removed by ... -
Characterization of Chromite Ore Processing Residue
(American Society of Civil Engineers, 2007)This paper summarizes the characteristics of chromite ore processing residue (COPR) in terms of their chemical compositions, phases, and recycling potential of iron and chromium through preliminary magnetic separation. ... -
Safety Management of RF Radiation Sources in the United Arab Emirates
(American Society of Civil Engineers, 2007)The research focused on the effects of radio frequency/microwave (RF/MW) radiation on the UAE population, measured their effects, identified their sources, and developed management processes to control the level of exposure. ... -
Removal of Oil from Produced Water by Dissolved Air Flotation
(American Society of Civil Engineers, 2008)Oil production generates a significant amount of water byproduct known as produced water. Following primary gravity separation, produced water is normally disposed of by injection into the formation from which it came. ... -
Design of a Passive Biobarrier System for Chromium Containment in Confined Aquifers
(American Society of Civil Engineers, 2007)Trench-type biobarrier is one of the commonly used in situ systems for bioremediation of contaminated aquifers. Design variables for such a system are the length of the biobarrier, -
Kinetic Model for the Remediation of Soils Contaminated with Hydrocarbons Using Low-Temperature Oxidation
(American Society of Civil Engineers, 2007)This paper presents a kinetic model for the remediation of soils contaminated with hydrocarbons by low-temperature oxidation (LTO). The oxidation of hydrocarbons, which consist of a mixture of straight chained, branched ... -
Development of a Novel Depleted Uranium Treatment Process at Lawrence Livermore National Laboratory
(American Society of Civil Engineers, 2008)A three-stage process was developed at Lawrence Livermore National Laboratory to treat potentially pyrophoric depleted uranium metal wastes. The three-stage process includes waste sorting/rinsing, acid dissolution of the ... -
On-Site Treatment of Septic Tank Effluent by Using a Soil Adsorption System
(American Society of Civil Engineers, 2007)A septic tank and soil absorption system (SAS) is a simple means of treating domestic wastewater using the filtration, sedimentation, chemical absorption, and biological characteristics of soil. Data obtained from countries, ... -
Modeling the Fate of Pharmaceuticals and Personal Care Products in Sewage Treatment Plants
(American Society of Civil Engineers, 2008)Chemical fate models can be used to estimate the transformation reactions and the partitioning behavior of pharmaceuticals and personal care products (PPCPs) in sewage treatment plants (STPs). Modeling the fate of PPCPs ... -
Comprehensive One-Dimensional Mathematical Model for Heat, Gas, and Moisture Transport in Methane Biofilters
(American Society of Civil Engineers, 2007)The long-term operation of a methane biofilter depends on maintaining a favorable environment for methanotrophic bacteria within the porous medium supporting their growth. The concentrations of methane and oxygen, moisture ... -
Field Demonstration of Biologically Active Zone Enhancement Using Acetate as a Sole Carbon Source for In Situ Reductive Transformation of RDX in Groundwater
(American Society of Civil Engineers, 2007)A field demonstration of acetate mediated biologically active zone enhancement (BAZE) for in situ reductive transformation of hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) in groundwater was conducted at the former Nebraska ... -
Growth of Four Serovar of <i>Bacillus thuringiensis</i> (Var. <i>Kurstaki</i>, <i>Israelensis</i>, <i>Tenebrionis</i>, and <i>Aizawai</i>) in Wastewater Sludge
(American Society of Civil Engineers, 2007)Growth patterns of four different serovar of -
Mixing Recovered Waste Fiber-Reinforced Plastic with Polyethylene Plastic Waste
(American Society of Civil Engineers, 2007)Polyblending was applied to mix waste fiber-reinforced plastic (FRP) and polyethylene (PE) plastic waste in various proportions and particle sizes. Compatibility, morphology, mechanical properties, and dynamical mechanical ... -
Application of Biocoagulant on Drinking Water Treatment
(American Society of Civil Engineers, 2007)A biocoagulant developed by the writers and called Bio-CoA was used to treat the turbid water in a bench-scale reactor as well as in a large pilot plant. The water quality after Bio-CoA treatment was compared to that treated ... -
Removal of Model Organic Precursors by Coagulation
(American Society of Civil Engineers, 2007)Low-molecular-weight organics, i.e., phloroglucinol (P), resorcinol (R), and p-hydroxybenzoic acid (PHBA), were selected as the target compounds to evaluate their removal and precursor reduction efficiency by coagulation ... -
Renewable Energy Generation by Full-Scale Biomass Gasification System Using Agricultural and Forestal Residues
(American Society of Civil Engineers, 2007)This study investigated the application of biomass gasification to generate renewable energy, using three different types of agricultural and forestal residues: rice husk, almond shell, and waste wood. The field work was ... -
Leaching of Heavy Metals Stabilized in Asphalt Matrix
(American Society of Civil Engineers, 2007)Long-term impact of stabilized/solidified hazardous waste on the environment was evaluated using a combination of long-term leaching tests and mathematical modeling. The waste used in this research is a dust collected from ...