Anoxic or Anaerobic Selectors: Which is Better?
Obtaining reliably high compaction characteristics and low SVI values has enormous economic consequences on activated sludge plant design and operation….
An Overview of the Lincoln, NE Nitrifying Activated Sludge System, Control of Filamentous Builking with an Anoxic Selector and Enhancing System Performance with an Automatic Solids Retention Time Control System
The City of Lincoln, Nebraska Theresa Street Wastewater Treatment Facility (WWTF) has recently made several modifications to the activated sludge…
A Comparison of Nutrient Removal at Three County of Maui Facilities
The County of Maui, Hawaii, operates three wastewater reclamation facilities (WWRF) on the island of Maui: Kihei WWRF, Lahaina WWRF,…
A New Activated Sludge Process Control Test Uncovers Secondary Clarifier Inefficiencies
A program was implemented at the Littleton/Englewood Wastewater Treatment Plant to monitor the flocculating, settling, and compacting characteristics of the…
70 Percent I/I Reduction – Sweet Home, OR
In Sweet Home, Oregon, flow monitoring and hydrologic modeling evaluations predict a 20:1 ratio of peak hour 5-year recurrence flows…
ALTERNATIVE OPERATIONAL STRATEGIES TO CONTROL POLLUTANTS IN PEAK WET WEATHER FLOWS
The design of King County’s new 38-mgd Brightwater Treatment Plant calls for using chemically enhanced primary treatment (CEPT) of high…
Alternative Disinfection Technology Demonstrates Advantages for Wet Weather Applications — A Pilot Study of Powdered Bromine Technology.
A bromine disinfection technology currently utilized in Japan for CSO disinfection was piloted by the City of Akron, Ohio. Bromochlorodimethylhydantoin…
Alternative Considerations in Sizing Aeration Basins
With greater emphasis on water conservation, more industries are discharging more concentrated wastewaters. This has caused organic concentrations of the…
Advances in Thermophilic Anaerobic Digestion
Significant advances have been made in the knowledge base and practical options for improving thermophilic anaerobic digestion over the past…
Advanced Anaerobic Digestion Performance Comparisons
Advanced anaerobic digestion processes are being developed and used at more wastewater treatment facilities in recent years, especially in North…
Addressing Digester Foaming by Fixing Activated Sludge System and Gaining Capacity in Both
The City of Richland Wastewater Treatment Facility digesters have experienced Nocardiainduced digester foaming problems from the time they went into…
Activated Sludge in a BNR World (Workshop 107) Process Control
Most controls used in the activated sludge process are also important for biological nutrient removal (BNR) processes since activated sludge…