New Trickling Filter Applications in the U.S. A
After falling in disfavor in the U.S. in the 1970s, trickling filters are now reappearing in new applications. The Trickling…
A Rapid “Purge-and-Transfer” Field Screening Technique for Volatile Organic Compounds in Groundwater
Brown and Caldwell Laboratories has developed a rapid screening technique for Volatile Organic Compounds (VOCs) in groundwater. The technique determines…
Using Operational Solubility Product Constants to Improve Water Softening Calculations
Lime-soda softening is one of the oldest and most important industrial water treatment processes. However, few engineers and chemists can…
Flow-Through Bioassay Testing: Sunnyvale Water Pollution Control Plant
The San Francisco Bay Area is the fourth largest metropolitan region in the United States. Its unique geographical setting and…
Engineering a Pond Closure
The paper describes details on the closure of a 7-acre surface impoundment owned by Pinole Point Properties, a subsidiary of…
Using a Stream’s Full Resources: How to Develop a Flow-Variable Industrial Discharge Permit
When the stream discharge permit for an industrial wastewater is set, the required level of treatment can either be based…
Enhancing Reaction Rates in Nitrifying Trickling Filters Through Biofilm Control
Reaction rates in tertiary nitrifying trickling filters have been significantly increased by the development of the biofilm-controlled nitrifying trickling filter…
The New Regulations–A Challenge for Small Systems
This article illustrates how the 1986 amendments to the Safe Drinking Water Act may affect small water systems by focusing…
State-of-the-Art Denitrification Process Protecting the Florida Environment
Successful design and operation confirms innovative approach! A unique wastewater process for nitrogen removal is operating in Hillsborough County, Florida….
Comprehensive Rehabilitation Results From Stege Sanitary District
Seven sewer agencies, including Stege Sanitary District, in the East Bay of the San Francisco Bay Area embarked on a…
U.S. Pipeline Infrastructure and Trenchless Methods
For most industrialized nations, the needs in terms of pipeline infrastructure are changing. The need is trending away from the…
The Energy Amenity: Heat Pumps Serve District Heating in Treatment Plant Energy Programs:
A treatment plant’s primary mission is to treat sewage, not be an energy utility. An energy complex that combines energy…