An Introduction to Cogeneration
Cogeneration is a somewhat general term that applies to a number of processes or systems. Cogeneration is probably best defined…
Upgrading Trickling Filter Effluents with the TF/SC Process
World-wide, there are many trickling filter plants that have given excellent service for decades, yet are in danger of abandonment…
Activated Sludge For Industrial Wastes-Process Control Considerations
Process control, as defined in this paper, includes all activities that result in the desired level of plant performance. Significant…
Liquid Stream Secondary Treatment Process Design at the Annacis Island Wastewater Treatment Plant of the Greater Vancouver Sewerage and Drainage District
The Greater Vancouver Sewerage & Drainage District (GVS&DD) is a major regional wastewater agency serving Vancouver, British Columbia and surrounding…
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)…