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…
A Unique Approach to Sulfide Modeling for Low Flows
The Elsinore Valley Municipal Water District’s Washington Avenue Lift Station, proposed for future (calendar year 2008) construction is located in…
A Rational Approach to Size Denitrification Filters to Meet TMDL Requirements
Both the Littleton/Englewood WWTP in Colorado, and the OWASA Mason Farm WWTP in North Carolina are being called upon to…
A Preventive Maintenance Program Lifts the Veil on Asset Management
In 2002, the City of Columbus, Ohio and the State of Ohio entered into a consent order agreement requiring Columbus…
WERF: Sewer Inspection Prioritization Using an Expert System
The sewer infrastructure of the US must be assessed and upgraded to meet the requirements of the EPA Sanitary Sewer…
A Combined Use Attainability Analysis and Technology-Based Approach to Setting Zinc Standards for TMDL Compliance
Historic mining activities at the London Fault Mine in Park County, Colorado, generate uncontrolled mine drainage which impacts water quality…
Ultraviolet Disinfection of Reverse Osmosis Product Water for Groundwater Replenishment in California
The Orange County Water District operates a reclamation facility in Fountain Valley, California. The Groundwater Replenishment (GWR) Project will reclaim…
The Role of Community Interaction in Sewer System Improvement Planning
The City of Columbus, Ohio has undertaken an aggressive Inflow and Infiltration (I/I) Remediation Program to eliminate designed sanitary sewer…
The Evolution of Sewer System Modeling for CSO Compliance in Onondaga County
Mathematical modeling has been an important tool in evaluating CSO abatement alternatives for Onondaga County, NY. The EPA Stormwater Management…
The City of Atlanta Wastewater Treatment Program: A Success Story
What began as a phosphorus control program wound itself through 1) public, political and environmentalist opposition, 2) a new Georgia…
Santa Rosa Fine Tunes its Flexible Biosolids Program
Beginning in 1992, Santa Rosa, California has developed a uniquely flexible biosolids disposal/reuse program consisting of a combination of reuse…