Update on Secondary Clarifiers: Design, Operation, and Performance
Activated sludge is the most commonly used biological process for treating municipal and industrial wastewaters. Although the following discussion focuses…
The Ownership of a Facility Management System
We are all too familiar with computer systems being procured, installed, loaded with data and after spending a lot of…
Integrating Modeling with GIS for Water Supply
Anyone who has used a computer model for planning a water distribution system knows that the actual running of the…
Integrating Modeling with AM/FM For Water Supply
Anyone who has used a computer model for planning a water distribution system knows that the actual running of the…
The Ownership of a GIS
We are all too familiar with computer systems being procured, installed, loaded with data and after spending a lot of…
A Discussion of The Advantages of Co-Thickening of Primary and Secondary Sludges in Dissolved Air Flotation Thickeners
Dissolved air flotation thickeners (DAFTS) are commonly used to thicken waste activated sludge; however, their use for co-thickening primary and…
Design and Operations Experience with Flocculator-Clarifiers in Large Plants
Historically, secondary clarifiers have contributed to instability in plant performance. The flocculator-clarifier development has demonstrated in a variety of plant…
Removal of Polycyclic Aromatic Hydrocarbons and Heterocyclic Nitrogren Compounds in a Municipal Treatment Plant
Emissions of polycyclic aromatic hydrocarbons (PAHs) and heterocyclic nitrogenous compounds (HNCs) were measured at a publicly owned treatment works (POTW)…
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…
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,…
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…
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…