Designing for Water Quality in a Developing Watershed
In the summer of 1999 a multi-purpose reservoir is scheduled to open for recreational use by the public. Located in…
Anaerobic Digestion Options to Create Class A Biosolids Processes
Class A biosolids can be produced within high-temperature anaerobic digestion systems. Several process options and arrangements utilizing thermophilic digestion processes…
Nitrogen Management Protocols for Biosolids Beneficial Use – WERF Project Status Report
Where other factors are not limiting, biosolids are land applied at “agronomic rates” to ensure that surplus nitrogen (above crop…
Partnering Makes Privatization Work
In 1995, the City of San Diego signed a contract with NEO Corporation and Minnesota Methane, LLC, located in Minneapolis,…
Can A Major Industrial Wasterwater Reuse Project Be Economically Feasible?
Industrial wastewater reuse is always a good idea, especially in arid and environmentally sensitive areas where wastewater discharge is restricted….
Improving Secondary Clarifier Performance and Capacity Using A Structured Diagnostic Approach
The causes of high effluent suspended solids (ESS) from secondary clarifiers are often incorrectly identified resulting in improperly focused remedial…
Extended Thermophilic Anaerobic Digestion For Producing Class A Biosolids At The Greater Vancouver Regional Districts Annacis Island Wastewater Treatment Plant
The Greater Vancouver Regional District (GVRD) is a major regional agency managing wastewater collection and treatment for Vancouver, Canada and…
Enhancing Nitrification In North American Activated Sludge Plants
Many plant owners, operators and designers consider the nitrifying activated sludge process as being a high hydraulic residence time (HRT)…
Digester Evaluation
Submerged fixed-cover design, introduced in 1993, gives conventional-shaped digesters the same key features that have made egg-shaped digesters successful in…
Chemically Assisted Primary Treatment: A New Approach To Evaluating Enhanced Suspended Solids Removal
Chemically enhanced primary treatment can provide enhanced total suspended solids removal. With these enhanced removals, enhanced removals of other pollutants…
Applying Private Sector Manufacturing Techniques to Wastewater Treatment to Improve Competitiveness
Public utilities are spending $358 million more on assets to deliver the same throughput when compared to private utilities. To…