Accelerating Electrons
At a wastewater treatment plant in Miami, five scientists have pointed a 1.5 million v `e-beam' at pathogens and hazardous chemicals. It's the only full-scale...
Buying Tomorrow's Water
Cities are finding that selling future access rights to sewer and water treatment plants can get them needed expansion capital. Although the access rights system is similar to development...
High Hopes for Cattails
As other areas of wastewater treatment go high tech, man-made wetlands are treating wastewater from small towns and coal mines. Plants are grown in about 1 ft of water. Suspended solids...
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...
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...
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...
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...
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...
Disinfection Aid?An Innovation in the Chlorination of Wastewaters
A modification to the disinfection process, termed the 'disinfection aid process' for wastewater effluents has been investigated. The addition of a second chemical,...
Treatment Plant Modifications to Conserve Energy and Improve Performance
Creative funding along with thorough planning and design contributed to the successful energy conservation program at the Willow Lake Wastewater Treatment Plant, Salem, Oregon. By funding...
Application of the ASPEN System for Simulation of the Detroit Waste Water Treatment Plant
The objective of this study is to simulate the Detroit Wastewater Treatment Plant (DWWTP) using the Advanced System for Process Engineering (ASPEN). The primary treatment facility has...
Testing of a 5-Stage Modified Bardenpho? WWTP
The Eastern Service Area Wastewater Treatment Facility (ESA WWTF) is a 13.5-mgd advanced wastewater treatment facility employing biological nitrogen and phosphorus removal processes located...
Microfiltration/Adsorption Technology for Treatment of Industrial Wastewaters: Pilot- and Full-Scale Studies
In this work the development and testing of wastewater treatment system using coagulation, microfiltration and carbon adsorption is described. Studies were conducted first on a bench or...
Dewatering Municipal Sewage Sludges?Selecting a Process
A sequential review is made of key considerations in selecting an optimum dewatering process, including its simplicity of operation and performance capabilities. Selection criteria further...
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