Milwaukee*s Next Step: Watershed Restoration Plans
The United States Environmental Protection Agency’s (EPA’s) watershed approach to facilities planning has been completed in southeastern Wisconsin by the…
Dynamic Updating Program for Just In Time Design of Water Reclamation Facilities
The LOTT Alliance service population is expected to increase from 150,000 to 213,000 by the year 2030. Water quality issues…
Solids System Stress Testing and Process Optimization
The paper outlines the lessons learned from a series of stress testing and optimization studies performed at several municipal wastewater…
Solving the City of Tacoma*s High Effluent TSS Problem: Unexpected Causes of Deflocculation
The Central Treatment Plant for the City of Tacoma has had problems with elevated effluent TSS concentrations and turbidity during…
Alternative Secondary Clarifier Designs for Managing Wet Weather Flows: Evaluation of the Influence of Tank Depth Using Side By Side Testing and State-of-the-Art Modeling
Optimal secondary clarifier performance is crucial to meet treatment requirements, especially when treating peak wet weather flows (PWWFs), to prevent…
Reducing the Mystery from Micronutrient Addition
Many industrial wastewaters require micronutrient addition to achieve the desired organics removal and biological solids settling properties. Water conservation and…
The 2007 Sludge Thickening Adventure in Boulder, Colorado
The City of Boulder, Colorado 75th St. WWTP (Boulder WWTP) was recently converted from a trickling filter/solids contact (TF/SC) process…
Biosolids as Gels: A New Way of Looking at Conditioning and Dewatering
Fundamental improvements in conditioning and dewatering can be accomplished with an accurate understanding of the biosolids being processed. Historically, the…
Water Recycling in Small Communities
Developments in technology for soil dispersal for decentralized systems in small communities have been documented. Cases where potable water supplies…
Model Prediction of Completely Autotrophic Nitrogen Removal under Different Reactor Configurations
Alternative novel biological nitrogen removal technologies may provide advantages over the conventional nitrification-denitrification nitrogen removal. One such advantage is the…
Nitrification in one week without external seeding * Startup of a new BNR plant
The City of Boulder converted their existing TF/SC process to a 25 mgd BNR activated sludge plant. Initial construction required…
Is Your CMMS Helping Your Performance?
This paper describes the City of Phoenix Water Services Department project to assess and identify enhanced use of Computerized Maintenance…