The Trickling Filter Finds a New Partner
After four years of study and evaluation at the pilot-and full-scale levels, the trickling filter/solids contact wastewater treatment process has…
Results-Oriented Sewer Flow Reduction Program at Alameda, California
In October 1982, the first phase of a sewer system evaluation survey was completed for the City of Alameda, California….
Preliminary Assessment of the Removal of Volatile Organic Compounds in a Biological Selector Process
The fate of selected volatile organic compounds (VOCs) in anoxic or anaerobic selectors was investigated at pilot scale. Tetrachloroethylene, 1,4-dichlorobenzene,…
Observations of Transport to Surface Water From a Plunging Inflow to Lake Mead
Algae growing in the surface water of Las Vegas Bay, an arm of Lake Mead, may receive nutrients contained in…
Heating and Cooling System Changes Slash Hospital’s Energy Bill
On the wall of John Henderson’s office at Albany General Hospital, two large graphs track consumption and costs for natural…
Energy Savings for the Plant Operator
The following discussion is divided into two main topics: energy conservation through process control and energy conservation through process changes….
Design of the Los Angeles Aqueduct Water Filtration Plant
Residents of Los Angeles have been drinking water from the Owens River since 1913 when the city’s water department engineers…
Acting Up * Why the Activated Sludge Process Is So Hard to Operate
Because the activated sludge process is highly controllable, it is the most commonly used biological treatment for municipal and industrial…
Water Conservation–Do We Need It?
Increasing demands and costs of supply have spurred a growing desire to use resources more efficiently. Federal, state, and local…
Process Design Considerations for Upgrading Secondary Treatment Systems in Integrated Bleached Kraft Mills
The secondary treatment system at a western integrated bleached kraft mill was evaluated for its ability to meet the proposed…
Flucculator-clarifiers bring performance benefits to large treatment plants
Clarifiers with a range of design features to promote flocculation are helping large treatment plants achieve consistently low effluent suspended…
How to Ensure Successful Passage of Proposed Wastewater Utility Investments: Capital Planning Processes for a New Era
In 1992, the Municipality of Metropolitan Seattle initiated a twenty-year capital planning process for the future design and construction of…