Preparing for a Successful Decommissioning
Recent state-level reforms, combined with a seemingly more flexible federal regulatory environment, are encouraging the redevelopment of environmentally-impacted properties. It…
Evaluation of Critical Activated Sludge Parameters for Dynamic Process Models
Dynamic process models, which facilitate the design of activated sludge systems, require numerous input parameters that characterize the influent wastewater…
Design Considerations for Ultraviolet Disinfection
The Hillsboro and Forest Grove Facilities treat wastewater for discharge to the Tualatin River to meet a 200 fecal coliform…
An Integrated Approach to Site-Specific Water Quality-Based Permitting
In the summer of 1993, following discussions with the Nebraska Department of Environmental Quality (NDEQ), the City of Lincoln, made…
The Role of Data Analysis Protocols in Obtaining Groundwater Quality Management Information
A water quality data analysis protocol (DAP) has been developed for a groundwater monitoring program at an industrial facility in…
Struvite Control at Sacramento
The Sacramento Regional Wastewater Treatment Plant (SRWTP) has experienced struvite (magnesium-ammonium-phosphate) scale buildup on certain equipment and pipes at the…
Making TF/SC Work For Windsor
It is anticipated that the City of Windsor’s West Windsor plant will be required to be upgraded from its current…
Maximizing Trickling Filter Nitrification Rates Through Biofilm Control: Research Review and Full Scale Application
Tertiary nitrifying trickling filters (NTFs) at the Littleton/Englewood wastewater treatment plant provide for nitrification to meet seasonally varying effluent requirements…
Activated Sludge Solids Inventory Control Using the State Point Concept
Activated sludge solids inventory control using the state point concept initially appears to many to be as nonsensical as “Form…
Evaluation of Air Emissions at the Alcosan WWTP
Extensive field testing and modeling was conducted at the ALCOSAN Wastewater Treatment Plant (WWTP) during the spring and summer of…
Total Water Management
The first step to total water management is accomplished by admitting that there is a limited water resource that must…
A New Approach to Wet Well Design: Better! Cleaner! Cost Less!
Modeling studies at hydraulics laboratories at Montana State University and ENSR Consulting and Engineering have confirmed the validity of an…