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Mathematical modeling is a useful tool for the design, analysis and control of wastewater treatment systems.
The activated sludge process is one of the most common processes used in wastewater treatment, and therefore is a particularly important candidate for the application of mathematical models.
In the 1980s, a task group organized by the International Association on Water Quality (IAWQ) developed a conceptual model of the activated sludge process, which has become an industry-wide standard for the development of computer-based activated sludge models. A recent version of the IAWQ model incorporates 19 components, 17 processes, and numerous rate and stoichiometric coefficients.
It is difficult and costly to quantify all of the necessary coefficients for any given application of the model; consequently, it is important to identify the most critical wastewater and biomass components and the relevant coefficients to be quantified for the most common uses of the model.
It is also important to provide guidance to potential model users on the use of default and/or estimated values for the remaining parameters.
Development of Practical Methods to Assess the Presence of Bacterial Pathogens in Water
The objective of this project was to develop and evaluate a practical technique to indicate the probability of the presence of bacterial pathogens in receiving waters. A practical method was...
Bioavailability and Characteristics of Dissolved Organic Nutrients in Wastewater Effluents
This study aims to investigate and assess:
1) the bioavailability of various P fractions, particularly dissolved P fractions (DOP), in advanced wastewater effluents
2) the nature and...
Contributions of Household Chemicals to Sewage and Their Relevance to Municipal Wastewater Systems and the Environment
Of the total number of consumer product chemicals the U.S. Environmental Protection Agency has identified, approximately 500 are considered high production volume (HPV) chemicals. This study...
Demonstrating Advanced Oxidation Coupled with Biodegradation for Removal of Carbamazepine
Carbamazepine is hydrophilic anthropogenic pharmaceutical found in wastewater effluents that is quite resistant to removal by conventional wastewater treatment processes....
Microbial Community Analysis
Microbial Community Analysis surveys the vast amount of theoretical and practical knowledge on the design of biological treatment systems. It describes the different types of biological wastewater...
Promoting Equitable Consideration of Decentralized Wastewater Options: Research Digest
This study, managed by the Water Environment Research Foundation (WERF) and funded by the U.S. EPA, identified the principal barriers that prevent engineers from...
Optimizing Filtration and Disinfection Systems with a Risk-Based Approach
Treated wastewater effluents contain high concentrations of particles; many of these particles are large (with diameters greater than 100 μm) and consist of densely-packed bacterial cells. ...
Overview of State Energy Reduction Programs and Guidelines for the Wastewater Sector
Approximately 35% of a wastewater treatment facilities’ total cost to provide wastewater service is for energy use. Industry wide, about 0.6% of the electric energy produced in the United States...