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...
Aerated Static Pile Composting of Wastewater Sludge: A Field Study in Longmont, Colorado
This is a report of experimental work at the Longmont wastewater plant at Colorado, on aerated static pile composting of wastewater sludge. 61% of the sludge mass used in compost piles...
Comprehensive Odor Control Programat East Bay Municipal Utility District (SD-1)
An odor control study was performed in a wastewater treatment plant in California to evaluate the interactive role of various factors tailored to site specific conditions. The scope of...
Radium Removal from Groundwater Using Sorption to Filter Sand
The use of this novel process to remove sufficient radium from drinking water by filter sand has been demonstrated. A major potential advantage of this process is that a minimal capital...
Design Considerations and Experiences with VOC Treatment Technologies
This paper presents a review of design considerations and experiences with packed column aeration for removal of volatile organic chemicals (VOC) from groundwater at various locations...
Ft. Lauderdale Wellfield Protection
Results of the study on groundwater contamination measurement and control are reported. The goal of this study was to ensure a safe and long-term supply of drinking water to the City of...
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...
Special Water Treatment in New Jersey
The New Jersey Department of Environmental Protection (NJDEP) performed a study on 'special water treatment'. The main goal of the project was to assess in detail...
Removal of Phenol from a Brine Aquifer: 2 Years of Operation
The article describes a pilot plant project to biologically treat groundwater polluted with phenols. The treatment scheme was based on laboratory tests, technical and economic analysis....
Chromium Removal by Activated Sludge
The behavior of chromium (Cr) in a laboratory-scale, activated sludge process was evaluated. Both pH and the oxidation state of Cr were confirmed as critical parameters for evaluating...
Large Scale ABF Mode Proves to be an Innovative Alternative for the City of Memphis
The article describes a modification carried out to overcome overloading of wastewater treatment plant at Memphis. The plant was originally constructed as a contact stabilization activated...
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...
Removal of Trace Organics in MunicipalWastewater
This paper presents the results of three years of monitoring effluent quality from two treatment facilities for trace organic chemicals in Pima County, Arizona. Approximately thirty 24-hour...
Evaluation of Chlorine Dioxide and Ozone Preoxidation on Conventional Treatment and Direct Filtration
The renewed interest in the use of chlorine dioxide and ozone as preoxidants has focused mainly on their effectiveness on color and THM precursor removal and as disinfectants. This paper...
Experimental Verification of a Unified Chlorine-Ammonia Reaction Model
A model of the reacting aqueous chlorine-ammonia system is proposed which describes equally well the rapid 'breakpoint' oxidation of ammonia or the slow decomposition...
Slow Rate Sand Filtration Using a Zeolite Surface Amendment
The objective of the study was to obtain detailed information regarding amended filter performance at surface loading rates 2 to 4 times higher than standard flow rates. Experiments were...
Meeting Revised Drinking Water Regulations Using Conventional Treatment Methods
This paper discusses the removal efficiency of standard treatment processes for each of the four groups of contaminants. The evaluation of a process's capability to meet the...
Removal of Radon and Uranium from a water supply
The removal of Radon and Radium from drinking water with the help of granulated activated carbon (GAC) adsorption was investigated. A packed bed column was used for the purpose. It has...
Low Head Filtration Removal Efficiencies of
The removal of Giardia cysts from low turbidity waters is of great concern in many areas of the United States. A pilot program was undertaken to determine if an established low head filtration...
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