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…
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…
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…
Dissolved Organic Nitrogen * Is It Significant,
The dissolved organic nitrogen (DON) portion of effluent total nitrogen species is of increasing concern because of increasingly tighter effluent…
From Pump Drawdown Testing to
A widespread problem facing many utilities is that their sanitary sewer lift stations are often not equipped with flowmetering equipment,…
Risk Based Approach to Selecting and Implementing an Integrated Customer Information and Asset Maintenance Management System
In an effort to improve the level of service provided to the citizens of Fulton County and increase operational efficiency…