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Construction by Computer
Olympia & York, the developers of the 8 million sq ft World Financial Center in lower Manhattan are using a computerized scheduling system to keep the flow of materials into the...

Implications of Soluble Microbial Products (SMP) Formation on Biofilm Reactor Performance
The objective of this study is to evaluate the implications of SMP formation for biofilm treatment. To do so, the extended steady-state model was applied to predict effluent concentrations...

The Optimization of Nitrification and Denitrification in Plug-Flow Activated Sludge Systems Treating Municipal Wastestreams
Most conventional plug-flow activated sludge plants experience nitrification, particularly during higher temperature conditions. Under these circumstances, additional power is required...

Predicting Radon Transport by Vegetation
Establishment of a vegetative cover on waste sites containing **2**2**6Ra (Radium) may provide conduits for transport of **2**2**2Rn (Radon) out of the waste into the above-ground environment...

Recyclying of Dust from Electric Arc Funances�An Experimental Evaluation
Each year the electric arc steelmaking industry generates approximately 650,000 tons of dusts containing valuable metallic resources such as iron, zinc, lead, and chromium. EAF dust is...

Combustion Sources of Residential Air Pollution: An Overview
Combustion by-products are a major source of indoor air pollution and have been measured in homes at levels above typical outdoor concentrations, and at levels which approach or exceed...

Emission and Control of Volatile Organics in Hazardous Waste Landfills
Landfill simulation and modeling can provide a useful tool in the management of hazardous wastes to estimate the vapor phase emissions of pollutants so that a realistic assessment can...

Testing of Permeable Materials for Retaining Contaminants in Subsurface Leachates
The use of a permeable, retentive treatment system could remove both organic and inorganic contaminants while still allowing flow. A testing procedure for determining the amounts of priority...

Permeability of Grouts Subjected to Chemicals
This paper presents the more recent results of a testing program which evaluated the long-term resistance to percolation of grouted soils, using acrylate, urethane and cement-bentonite...

A Field Study of Water Movement Through Clay Liners
A monitoring system has been designed for the field verification of a numerical model of water movement through the cover clay liner of hazardous waste landfills. The most unique aspect...

Design of Final Covers for Landfills
Final covers or caps are incorporated into a completed landfill to limit the amount of moisture percolation through waste materials. A properly designed final cover system provides the...

Effects of Industrial-Municipal Co-Disposal
A study was conducted to evaluate the physical, microbiological, and chemical conditions of nineteen experimental landfills after the completion of a ten-year long municipal refuse/industrial...

Hydrogeologic Investigation of the Chillicothe, Ohio Landfill
A hydrogeologic investigation of a municipal waste landfill determined that the local surface and ground water are being polluted. Water quality monitoring and aerial photography were...

Comparison of Two Audits for Electric Utilities
Two case studies on environmental audits were examined to illustrate the differences between the comprehensive audit and a focused audit. The differences in audit team composition, technical...

Full-Scale Automation of an SBR Wastewater Treatment Facility
Due to advantages offered by discontinuous wastewater processing, considerable attention has been given to the use of sequencing batch reactor (SBR). This paper will examine the implementation...

Incinerating Dioxin Contaminated Waste at the USEPA Combustion Research Facility
The objective of the tests reported herein was to evaluate the incinerability of the toluene stillbottoms by determining whether 99. 9999% DRE could be achieved. All tests were performed...

Power from the Incineration of Wastewater Sludge
The City of Kansas City, Kansas recently completed an upgrading of their existing primary treatment and sludge handling system in preparation for the addition of a high purity oxygen activated...

Trace Toxic Metals Emissions from Hazardous Waste Incinerators
A physical model is proposed in order to explain the vaporization of metals during metallic waste incineration and is based on work performed to investigate inorganic emissions from coal...

Multiple-Hearth and Fluid Bed Sludge Incinerators
This paper presents recommended practices for design and operation of multiple-hearth and fluid bed furnace systems for combustion of sludges in order to eliminate or mitigate the problems...

Detoxifying Metal-Contaminated Solid Wastes by Induced Ion Exchange?A Theoretical Evaluation
The presence of minor amounts of insoluble heavy metal precipitates may render a large body of innocuous solids (say fly ash, soil, calcium carbonate or even biological sludge) potentially...

 

 

 

 

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