Infiltration Reduction Utilizing Flood Grouting Technology
The 1950s-era concrete pipe sanitary sewer system in Seattle’s Broadview neighborhood experiences significant wet weather inflow and infiltration. Intense wet…
Industrial Growth with Shifting Outfalls: How the City of Quincy is Solving a Unique Wastewater Challenge by Optimizing the Use of Four Utilities
Faced with a unique challenge of supporting economic development, balancing water resource issues, changing environmental permit regulations, and reversing aquifer…
Using Hydrologic and Hydraulic Modeling to Assess Wet-Weather Performance and Sanitary Sewer System Capacity for Charlotte-Mecklenburg Utilities
Charlotte-Mecklenburg Utilities Department (CMUD) developed a system-wide hydrologic and hydraulic model to support its Capacity Assurance Program (CAP) and system…
Optimizing Primary Sedimentation and Wet Weather Flow Treatment Using CFD Modeling
Computational fluid dynamic (CFD) modeling was used to evaluate primary settling tank (PST) performance and a novel wet weather chemically…
Dissolved Air Flotation as Secondary Clarification
Dissolved Air Flotation (DAF) units have long been used in the food industry to remove fats, oils and grease (FOG),…
Comparison of Three Wet Weather Flow Treatment Alternatives to Increase Plant Capacity
The Milwaukee Metropolitan Sewerage District is evaluating alternatives to increase the South Shore Water Reclamation Facility wet weather treatment capacity…
Comparison of Process Alternatives for Enhanced Nutrient Removal: Perspectives on Energy Requirements and Costs
As part of the Chesapeake Bay Restoration Act’s Enhanced Nutrient Removal (ENR), the Maryland Department of Environment (MDE) issued a…
Development of Guideline Documents for the Inspection and Condition Assessment of Pressure Mains
Pressure mains, including both potable water mains and wastewater force mains, rarely receive the levels of inspection and maintenance routinely…
Breakpoint Chlorination of Petroleum Refinery WWTP Effluent
Breakpoint chlorination followed by dechlorination was studied as a non-biological option to remove ammonia and nitrite from a California petroleum…
The Best Bang for the Buck: Making the Most of Available Influent Carbon for Nutrient Removal
The premise of this paper is that, even if influent carbon is insufficient to meet effluent nutrient limit requirements, it…
The Dirty Secret of Primary Sludge Prefermenters
The impacts of the recycled solids load from primary sludge prefermenters on activated sludge BNR treatment processes are evaluated in…
Solids Process and Overall Plant Automation * A Systematic Approach
Instrumentation and supervisory control and data acquisition (SCADA) systems are becoming more and more sophisticated and allow processes and treatment…