Planning and Funding Asset Replacement: One Agencies Experience
This paper will be of interest to any agency concerned with sound asset management and maintaining the quality and viability…
Pumping Station Modifications to Comply with Ansi/HI 9.8 Improve Performance While Lessening O&M Requirements — Two Case Studies.
Oversized wet wells in wastewater pumping stations lead to the accumulation of grit, sludge and floatable materials. Trench-type wet wells…
Pima County, Wastewater Management, Northwest Outfall Interceptor Emergency Rehabilitation Project
On September 7, 2002 two sinkholes opened on a busy arterial street in Tucson, Arizona. As a result of the…
Passive System Treats Industrial Stormwater for Class Vinjection Criteria
EPA has begun to more closely regulate Class V stormwater injection wells under the UIC permitting program. In cases where…
Operations and Maintenance Requirement of Vortex with Disinfection and Screening with Disinfection CS
Technologies such as screening, vortex and high-rate disinfection are successfully operating to meet CSO requirements at satellite locations through the…
Optimizing Nitrogen Removal in an MBR Under Abnormal Operating Conditions.
During startup and commissioning of a modified Ludzack-Ettinger (MLE) membrane bioreactor (MBR), Pima County Wastewater Management Division (PCWMD) staff were…
Operational Keys to Nitrite Lock
Nitrite-nitrogen seldom exceeds 1.0 milligram per liter (mg/L) in a properly controlled nitrification process. As soon as ammonia is oxidized…
Odor Control Improvements Using a Biofilter for the City of Glouchester, Massachusetts Wastewater Treatment Facility
The City of Gloucester, Massachusetts owns and operates a primary wastewater treatment facility (WWTF) that serves over 30,000 people and…
ODOR CONTROL BIOSCRUBBERS. A 20-YEAR HISTORY OF SUCCESSFUL APPLICATIONS.
Bioscrubbers, also known as biotrickling filters, have been used to control odors at many North American wastewater treatment plants since…
Now with Grease-Cutting Action!
Responsible for sanitary sewer overflows (SSOs) in many wastewater collection systems, grease blockages may be prevented via source control, mechanical…
North American Performance Experience with Anoxic and Anaerobic Selectors for Activated Sludge Bulking Control
Obtaining reliably high compaction characteristics and low SVI values has enormous economic consequences on activated sludge plant design and operation….
No Chemicals Required
The Metropolitan Wastewater Treatment plant in St. Paul was the first Minnesota plant to be converted to biological phosphorus removal…