News

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 1999 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.

For the latest version of the Adobe Reader go here.

Papers presented are the opinion of the author and not that of the Operators Association (AWWOA)

Planning a Digester Cleanout

The cleaning of a 9510 cubic meter digester is not something that is done that often and certainly can not be planned in a matter of a few hours. The OMI Canada staff at the Capital Region Sewage Treatment Plant (CRSTP) was faced with the task of cleaning their primary digester just 4 months after assuming the responsibility of operations and maintenance of the CRSTP. It is our hope that whomever may be considering such a task will be assisted by this write up.

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Iron Bacteria and Organic Carbons: What They Mean to Iron and Manganese Removal

by Elmer O. Sommerfeld, Marketing Manager, AWI, Calgary, Alberta.

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Introduction to Pressure Sewers

Pressure sewers have been shown to offer a viable solution to some very difficult small community sewering problems. The technology was developed and thoroughly demonstrated in the early '70s. Hundreds of projects were installed under the EPA's Innovative & Alternative Grants Program up into the middle '80s, and hundreds more have been installed under the incentives of the free enterprise system. This has produced a large base of installed systems from which the overall track record of this alternative technology can be readily determined.

Several case studies will be presented. Many of these systems have been in operation for at least fifteen years. Data on initial cost, operating costs and service call rates will be included. They will illustrate the high reliability, low operating costs, and successful sustained performance of grinder pumps and pressure sewer systems in a variety of applications where on site systems were not practical. These include small villages on rock with literally no soil, areas where the water table seasonally rises to or above the surface and environmentally fragile lakefront communities.

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Y2K Preparations
City of Calgary's Wastewater Treatment Plants

A detailed overview of the City of Calgary's preparations to meet the new millennium at its Bonnybrook & Fish Creek Wastewater Treatments Plants as well as the Shepard Sludge Lagoons by John Barret - City of Calgary

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Industrial Waste Disposal - The Cleanit Greenit Way

With the increasing cost of landfill and a growing demand for environmentally responsible companies an alternative method for waste disposal is high on the agenda for many businesses. KC Environmental Group Ltd. (KC Environmental) provides an environmentally preferable and economical option - industrial composting.

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Alternative Municipal Sludge Disposal Options:
Case Study
Town of Devon - WWT BIO Solids Disposal to Compost Site

The Town of Devon is faced with finding an alternative to its sludge disposal after changes are made to the landfill system. A study was carried out in order to put an option package together that was both cost effective over a 15 year period & also environmentally friendly.

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An overview of the use of UV Systems in Wastewater Treatment.

Trojan Technologies

Municipal wastewater generally requires disinfection to meet specific bacterial limits before discharge to surface waters. The main objective of disinfection is to reduce the number of waterborne pathogens to safe levels, and thereby lowering the risk of exposing the public to infectious disease. The persistence of some pathogens in receiving waters and soils indicates that disinfection of wastewater effluents provide the first line of defence for drinking water from surface or ground sources. To meet this objective, the disinfectant must inactivate a wide range of bacteria and viruses in a variety of water and wastewater qualities. Disinfection may be accomplished by chemical or physical methods. However, an increased awareness of the many disadvantages of chemical disinfectants, specifically chlorine, has resulted in the selection of UV as an alternative with many attractive features and benefits. Ultraviolet (UV) light provides a physical process for the disinfection of water and wastewater without the disadvantages associated with chemical disinfection. In total, it is estimated that over 2000 wastewater UV systems are in operation in the United States and Canada.

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