Biological Treatment for the Control of Toxic Contaminants in Bleached Kraft Mill Effluents
Much emphasis has been placed on the adverse environmental effects of effluents from chemical pulp mills utilizing chlorine-based bleaching. Bleached…
Process Optimization and Design of Anaerobic Digesters for the Sacramento Regional County Sanitation District
The Sacramento Regional Wastewater Treatment Plant (SRWTP) treats primary and thickened waste activated sludge in seven conventional shaped primary anaerobic…
Efficient Water Use–A Part of Areawide Environmental Management
The Association of Bay Area Governments (ABAG), which is the regional planning agency for the nine-county San Francisco Bay Area,…
Effect of Operating Variables on Nitrification Rates in Trickling Filters
A 2-year pilot study was conducted by the City of Malmo, Sweden, to determine the maximum capacity of existing trickling…
Long-term Odor and VOC Performance Tests on Biofilters
This paper presents results and observations from a long-term pilot test of bulk media biofilters to assess their reduction of…
Development of a Document Management System for Plant Drawings
This paper discusses a document management system developed for the City of Medford, Oregon, Water Quality Control Plant. The computerized…
The Effects of Wastewater Characteristics on Metals Partitioning in Activated Sludge Mixed Liquor
Batch experiments were performed using mixed liquors from an activated sludge process receiving mainly residential wastewater and another activated sludge…
Low SRT Anaerobic Selector Pilot Plant Operation for SVI Control
A 75.6 liter per minute (lpm, 20 gallons per minute) anaerobic selector pilot plant was operated at the King County…
Using Simulations to Enhance Process Understanding
This paper discusses the use of simulations for training wastewater treatment plant operators. The simulations combine common laboratory tests with…
Al West Meets W. Edwards Deming: A Statistical Approach to the Control of the Activated Sludge Process
Shewhart control charts are used extensively in manufacturing to statistically monitor product quality, a key element in the total quality…
Should You Be Partnering?
Partnering on public works projects involving owners, construction contractors, and engineering firms is beginning to occur more often. The American…
Chemical Modeling to Solve Struvite Scaling Problems at the Sacramento Regional Wastewater Treatment Plant: A Progress Report
The precipitation of struvite (MgNH4PO4.6H2O) is a recurring problem in anaerobic sludge digestion systems. Soluble magnesium, ammonia, and phosphorus (P)…