Stormwater Utility Funding
Cities nationwide are under regulatory pressure to upgrade local stormwater utility programs to comply with increasingly stringent NPDES permits. For…
So, You Decided to Build an MBR? Tips to help optimize process performance.
Tips to help optimize process performance. Membrane bioreactors (MBRs) are a viable treatment alternative when a wastewater utility has footprint…
Sludge Quality: The Key to Secondary Clarifier Performance
Within the wastewater treatment profession there is considerable disagreement as to the best method for controlling the activated sludge process…
Sizing Denitrification Filters
Although different in many respects, the Littleton-Englewood (Colo.) Wastewater Treatment Plant (WWTP) and the Orange Water and Sewer Authority (OWASA)…
Should I Keep It or Replace It? A Risk-Based Approach to Making Asset Rehabilitation and Replacement (R&R) Decisions.
Most of the US wastewater assets that went into operation 25 to 30 years ago in response to the Clean…
Shifting From Disposal to Sustainable Resource-Based Strategies — Implementing LOTT's Wastewater Resource Management Plan
This paper discusses implementation of the LOTT Wastewater Resource Management Plan (Brown and Caldwell, 1998) from planning through finance and…
Security in our Nation's Capital – The DC WASA Perspective
Most people do not think of wastewater systems as significant vulnerabilities or as being prone to malevolent, intentional acts. Most…
Secondary Clarifiers: The Mechanisms Behind the Myths
All biological wastewater treatment processes depend largely on the solids capture efficiency of their secondary clarifiers. Because solids escaping secondary…
Scenario-based Financial Planning: A New Tool for Utility Managers
The Goleta Sanitary District has developed a financial model of its operations that takes into account all important aspects of…
Saving the Chesapeake Bay — Planning for Less Than 3 mg/l Total N and 0.1 mg/l Total P — the Lynchburg Regional WWTP Story
This paper describes work carried out to evaluate alternatives to allow enhanced nutrient removal at the Lynchburg Regional WWTP, to…
Risk-Based Model/Decision Support Tool for Wastewater Asset Refurbishment and Replacement (R&R) Planning
Utility best management practice, as embodied in asset management terms, is delivering to customers defined levels of service at an…
Recent Improvements to Trench-Type, Self-Cleaning Wet Wells
In trench-type wet wells, pump intakes are in a deep, narrow trench, below and in line with the influent conduit….