Integrated Management Of The Sanitary, Combined, and Separate Storm Sewer Systems At The City of Portland, Oregon
The City of Portland, Oregon, is developing an integrated maintenance system for its three types of sewer systems, combined, sanitary,…
Why The Activated Sludge Process Is So Hard to Operate: Modeling Brings New Light To Operations
A kinetics based activated sludge model was calibrated using historical data obtained from the Blue River Treatment Plant. Simulations were…
Villa Dominico Landfill Vertical Expansion Project (VEP) Leachate Treatment System Design
In conjunction with Techint S.A., Brown and Caldwell designed a vertical expansion for the Villa Dominico Municipal Solid Waste (MSW)…
WERF: Impact of Bubble-Induced Surface Turbulence on Gas-Liquid Mass Transfer in Diffused Aeration Systems
The effect of turbulence, induced by diffused bubble aeration, on mass transfer at the water surface of a pilot aeration…
Change and Competition: The New Management Implementation Challenges
It is predicted that the changes that will occur in the next 50 years will exceed the changes that have…
Seismic Imaging Helps Define The Risk of Pipeline Collapse
Agencies all across the country are struggling with their infrastructure needs. Unfortunately, news stories about street collapse associated with aging…
VOCs in Fixed Film Processes. II: Model Studies
Models incorporating liquid-gas mass-transfer and biofilm mass-transfer resistances were developed for trickling filters (TF) and rotating biological contractors (RBC). Biodegradation…
VOCs in Fixed Film Processes. I: Pilot Studies
A study of the fate of volatile organic contaminants (VOCs) in trickling filters (TF) and rotating biological contactors (RBC) was…
Estimation of Fugitive Emissions from Refinery Process Drains
Fugitive emission sources in petroleum refineries are generally defined as volatile organic contaminant (VOC) emission sources from leaking equipment (valves,…
Odor Control Features Make Lagoons an Acceptable Sludge Process
Studies and full-scale test operations at Sacramento’s new Regional Treatment Plant site show that large-scale facultative sludge lagoons can be…
Are You Ready for an EPA Audit?
Does an auditor actually have the final word in determining grant eligibility? Can the grantee do anything about it? Is…
Cleanup and Containment of PCBs–a Success Story
This paper describes the methodology employed in meeting the requirements of the regulatory agencies and the General Electric Company and…