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....
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...
Selective Calcium Removal for Water Softening
The paper reports on a 'Water Quality Control Study' for the City of Lafayette, Louisiana. This paper focuses on the laboratory phase of the project. The City...
Use of Water Hyacinths to Upgrade Treatment Plants
The primary objective of this research was to evaluate the feasibility of utilizing water hyacinths to upgrade effluents from heavily-loaded municipal wastewater treatment plants located...
A Method for Design and Evaluation of Rapid Sand Filters Treating Secondary Effluents
The information presented in this paper provides a framework for analysis of rapid sand filter performance. Process variables are quantitatively related to filter design variables in a...
Removal of Priority Pollutants in Wastewater by Secondary Treatment and Groundwater Recharge
Monitoring influent and effluent wastewater for organic priority pollutants at two Tucson-area treatment facilities has shown significant removal rates for commonly detected pollutants....
Full-Scale Evaluation of Filter Influent Chlorination and Ozonation
Ozone and chlorine applied ahead of pressure filters are compared to determine the effect of the chemical addition on the pressure differential across the filter bed. The study was significant...
Design and Construction of Slow Sand Filters
The belief that large area requirements are necessary is based on old concepts and contemporary engineering designs that overstate area requirements. Large area requirements result from...
Mass Balance Analysis of Decomposed Refuse in Laboratory Scale Lysimeters
Decomposition of shredded municipal refuse was studied under laboratory conditions with leachate recycle and neutralization. Cellulose and hemicellulose accounted for 91% of the methane...
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