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…
New Process Design Procedure for Dealing with Variable Trickling Filter Effluent Suspended Solids
Based on a survey which showed that seven of eight conventional trickling filter (CFT) plants exceeded the U.S. Environmental Protection…
More Realistic Soil Cleanup at Standards Using Dual-Equilibrium Desorption Model 918
The desorption of contaminants from soils/sediments is one of the most important processes controlling contaminant transport and environmental risks. None…
Mitigation the Cost of Dentrification in Fixed Film Plant with Nitrate Recycle
This paper describes the extensive modeling carried out to determine the design expansion requirements for each unit process of the…
Minimising Odors for a New Biosolids Program
The City of Toronto, Ontario, operates four wastewater treatment plants (WWTPs) in an urban environment of 2.5 million people. At…
Miami-Dade Water and Sewer Department Disinfection Demonstration
Miami-Dade Water and Sewer Department (MDWASD) conducted pilot testing of alternative disinfection technologies at the MDWASD South District Wastewater Treatment…
Measuring Nitrification Rates for Big Payouts
A three year-long investigation sponsored by the Water Environment Research Foundation and many supporting agencies addressed the need for simple…