Heavy Metals Pollution Monitoring Through the Critical Pathways Analysis: The Sepetiba Bay Case
The methodology of the critical pathway analysis has been widely employed to monitor the environmental impact of nuclear power plants in the aquatic environment. This methodology has been...
Recent Erosion in the Stable Ipanema-Leblon Beach in Rio De Janeiro
This paper presents the findings of a diagnostic study contracted by the City Hall of Rio de Janeiro, concerning beach erosion problems. It first reviews the problem and existing data....
Automated Design of Wastewater Plants
Computers have been used for individual steps in design of wastewater treatment plants, and now these steps have been tied together, linked by an aggregate computer program the designers...
Sulfide in Wastewater Collection and Treatment Systems
ASCE Manual 69, Manual of Practice on Sulfide in Wastewater Collection and Treatment Systems, is intended to help planners, designers, and operators of wastewater facilities understand...
POU/POE Devices: Availability, Performance, and Cost
In order to gather and summarize information and data on point of use/point of entry (POU/POE) devices, a committee was established by the Environmental Engineering Division of the American...
POU/POE Water Treatment: Regulatory Challenge
During the past few years the use of point-of-use (POU) and point-of-entry POE) water treatment devices has grown dramatically. One attendant consequence has been the proliferation of...
Use of POE/POU Technology at US Army Installations
A wide spectrum of adverse water quality characteristics has been experienced at US Army installations throughout the country. These characteristics, both interim and long-term in nature,...
Point-of-Entry/Point-of-Use Water Treatment-? Where Do We Go From Here?
The development and marketing of point-of-entry-entry/point-of-use (POE/POU) devices has become a multi-million dollar business, and is projected to become even larger with the annual...
Contact Stabilization Process Analysis and Formulation
In this paper, the contact stabilization process is analyzed. In comparison to the conventional activated sludge process, there are a larger number of independent design variables involved...
Application of Field Proven Fine Bubble Membrane Aeration Technology
Fine bubble membrane diffusers represent a significant technological advancement in diffused aeration technology by providing the consistently high transfer efficiencies of fine bubble...
Importance of Aeration Basin Detention Time in the Activated Sludge Process
Aeration basin detention time is a key design parameter for an activated sludge system at a wastewater treatment plant. The impacts of reducing the aeration time is illustrated by a case...
Control of
The paper reports on a study to determine the cause(s) of the biological imbalance and identify corrective measures. Project activities included: isolation and identification of filamentous...
Optimizing the Activated Sludge Process by Encouraging Futile Cycling
A study was conducted to demonstrate that cell yield in activated sludge processes can be decreased without increasing oxygen consumption by applying operating conditions that encourage...
Risk of Waterborne Infectious Illness Associated with Diving in the Point Loma Kelp Beds, San Diego, CA
There is considerable interest in estimating the risk of bacterial and viral illness (i.e., disease, infection) associated with scuba diving in the Point Loma kelp beds located within...
Gamma Exposure from Rn Progeny in GAC Units
An investigation into the gamma exposure rate generated by granular activated carbon (GAC) water treatment units focused on ten sites that covered a range of source radon (Rn) in water...
Ozonation of a Biorefractory Organic Compound
This study involved determination of the degradation of chlorendic acid due to ozonation, possible biodegradation of the resultant products, and possible toxicity of the resultant products....
Conducting a Waterline Corrosion Evaluation
A study has been conducted to determine the level of corrosion activity occuring on the U.S. Navy's potable waterlines on Guam. The study evaluated soil parameters including...
Loss of Carrying Capacity in Pipes?Transporting Softened Water with High pH
The increase in pipe roughness and loss in carrying capacity for water mains carrying high pH water is documented with over 20 field tests conducted in Austin, Texas. The data show that...
Pre-Treatment Process Control of a Variable Quality Raw Water Supply
The West Coast Regional Water Supply Authority is the public agency charged with the development of public water supply for the Tampa Bay Area in the state of Florida. The Authority's...
Study of Direct Potable Reuse of Reclaimed Wastewater: Preliminary Results
The study includes a comprehensive attempt to measure as many as possible of the parameters which may effect the public health risk associated with reuse of municipal wastewater, after...
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