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The Technical Area of the AWWOA web site is provided for any Operator that would like some insight into various topics of interest within the field of water and wastewater treatment. Most all of the papers presented come from technical sessions held during the Associations' Annual Seminars. However, if any of you would like to have a paper published on this site, we would welcome your effort. E-mail awwoa@awwoa.ab.ca with your information and arrangements can be made to publish your paper.
Here you will find a number of papers that were presented at the AWWOA 2000 Annual Seminar held in Banff. A short synopsis details each of the papers presented.
The following papers are in an Adobe® Acrobat® PDF file format. You will need to have the Acrobat® Reader installed in your computer in order to view these files or be using the latest browser with the Adobe® plug-in installed.
Papers presented are the opinion of the author and not that of the Operators Association (AWWOA).
The Optimization of a Wastewater Stabilization Lagoon System
This paper presents a case study of the wastewater treatment system for the Village of Hamel, IL, USA. The wastewater treatment system was originally constructed in 1930 as a single cell passive lagoon. In 1975, Hinde Engineering (Lake Bluff, IL) fine bubble aeration equipment and concrete barrier walls were installed to improve effluent quality and increase capacity by delineating the single cell into a three-cell system with a total retention time of 42 days. In 1997 the aeration system was upgraded with an Air Diffusion System (ADS) fine bubble aeration. One of the two in-ground sand filters was converted to a aerated rock biofilter (living rock filter) to enhance final polishing and ammonia removal. Pre-formulated natural bacteria and enzymes were applied to solubilize and reduce the approximate 0.45 meter (18 inch) sludge layer online without necessitating removal of the system from service or applying for desluding permits.
Non-Contacting Flow and Level Measurement
This presentation will give you an overview of the types of non-contacting flow and level instruments that are available, along with examples of how these technologies are used in water and wastewater treatment. Recent advances in instrument and sensor designs that are expanding applications and improving performance and accuracy.
"Parallel-Series - A New Kind of Pump Station"
With the ever increasing development of new subdivisions and the infill of land, a need is generated to upgrade existing pump stations to meet new the demands. This must be accomplished with limited funding and in many cases must be achieved utilizing existing forcemains. Mr. Richard Jacobs P. Eng. looks at meeting these demands with a "New Kind of Pump Station".
Development of a Real-Time Disinfection Evaluation (CT) Program at a Large Conventional Water Treatment Plant
With regulatory requirements for evaluating, monitoring, and reporting disinfection performance at drinking water treatment plants (WTP's) on the rise across the industry, the starting point for most drinking water producers is the development of a disinfection evaluation program. This paper reports on the process and results of the City of Calgary's disinfection evaluation program at the City's Bearspaw Water Treatment Plant (BWTP). The objective of the paper is to outline the process developed for this project, using the BWTP results to illustrate the concepts.The three main elements of the evaluation process are discussed, and the logical progression of the process from the planning stage, to the field-work, to the use of computer spreadsheet models, and finally to the extension to real-time CT evaluation, is presented. A detailed discussion of the required field-work (tracer tests) is given, including useful lessons learned from this project, along with the methodology of tracer test data reduction. To provide context for the discussion, an explanation of the CT Concept is given. Also, the determination of WTP disinfection requirements based on regulations for the removal of water-borne contaminants is illustrated.