Providing for the Public
                       
   

Located on the North Saskatchewan River, the Gold Bar Wastewater Treatment Plant is Edmonton’s sole wastewater treatment facility. The Gold Bar facility, which began operation in 1956 has been a leader through much of its history. In 1998, the plant installed Ultra Violet (UV) disinfection and at the time, its high intensity, medium pressure UV system was the largest application of its kind in the world. It has consistently ranked as one of Canada’s top wastewater facilities from the standpoint of effluent quality and a recently completed upgrade to tertiary level treatment means an even higher quality effluent is now produced.

Gold Bar made the transition to tertiary treatment when it upgraded the plant to include a bio nutrient removal process called BNR in December of 2001. The BNR process originated out of South Africa and was the brainchild of Dr. James Barnard, brother of the famous heart transplant pioneer, Dr. Christian Barnard. It works by a complex manipulation of wastewater bacteria within carefully controlled environments known as "bioreactors", variously depriving and then feasting them on air. Known as Bio-P bacteria, they are specially targeted for removing phosphorus and ammonia-nitrogen, the two nutrients most plentiful in domestic wastewater. The plant opted for this technology over the more traditional chemical phosphorus removal despite the challenges in adapting it to a northern climate, because it complemented the natural treatment processes that have long been the plant’s trademark.

Research & training at Edmonton’s Gold Bar Wastewater Treatment Plant

Construction has begun on the new Wastewater Research and Training Centre at the Gold Bar Wastewater Treatment Plant. As part of the City’s Waste Management Centre of Excellence, it will provide state-of- the-art facilities for research, development and testing of new technologies for improving wastewater treatment.

The centre is funded through the Infrastructure Canada-Alberta Prog-ram (ICAP) at a total cost of $3.65 million. It will be the first of its kind in North America and will include classrooms, a lecture theatre and a sophisticated pilot plant and laboratory.

When the centre is complete researchers will have unprecedented opportunities to conduct a wide range of projects at a leading-edge treatment plant. The centre’s educational facilities and partnerships with the academic and business community will allow it to provide and participate in a variety of workshops and conferences.

The centre will enhance the City’s ability to protect the environment and adapt to new environmental standards. It will also help identify more efficient means of treating waste. It is also expected to attract investment, business and training specialists to Edmonton.

Partners in the Centre of Excellence include AMEC, the Alberta Research Council, University of Alberta, NAIT and Olds College.

 
  Living laboratory

Gold Bar has embarked on an ambitious program to make the plant a living laboratory for wastewater treatment research and training. Some exciting research is now underway under the auspices of the City’s Centre of Excellence in Waste Management. It includes a micro-turbine that utilizes surplus biogas from the plant’s anaerobic digesters; membrane filtration of the final effluent, producing high-grade utility water for in-plant use and external customers; pilot testing of biofilters for odour control; ultrasonic treatment of digested sludge to enhance sludge digestion; and more.

           
  Outstanding wastewater treatment in Calgary

Calgary’s wastewater facilities are some of the best in Canada, in fact, it is the only Canadian city to receive a Grade A from the Sierra Legal Defence Fund's cross-country review of municipal wastewater treatment practices, This is in keeping with Chatelaine Magazine’s rating of Calgary as being the second most healthy Canadian city overall and #1 for wastewater treatment.

The above accolades are a result of hard work and good planning, engineering and management. Recently the City upgraded its Fish Creek wastewater treatment plant by adding an ultraviolet-disinfection unit and switched from chemical phosphorus removal to biological nutrient removal at the Bonnybrook plant. Both plants now provide 100 per-cent disinfecion of all effluent released into the Bow River.

Calgary’s sewage system protects public health and the environment by collecting and treating wastewater from residences, schools, hospitals, businesses, and industries throughout the city and adjacent municipalities. The Bonnybrook Water Treatment Plant serves about 750,000 citizens while the Fish Creek Water Treatment Plant serves about 165,000 citizens. In total the two plants process more than 470 litres per day per person. That is a lot of water handled in a manner that does not endanger the Bow River ecosystem and no doubt is partly why Chatelaine noted Calgary's reputation as the location of world-class trout fishing on the Bow River, downstream of the City.

   
         
       
         
Managing rainwater

The storm drainage system in Calgary is a separate network of underground pipes plus storm-water retention ponds to hold excess water during heavy rainstorms or spring runoff. The retention ponds also help collect sediment and reduce the amount of foreign materials that end up in the river.

The challenge in designing an adequate storm drainage system is to effectively handle heavy localized rainstorms or snowmelts. As good as Calgary’s storm drainage system is, there are still concerns about storm water having an adverse impact on the water in the B

   
   
Keeping it crystal clear

Delivering crystal clear mountain waters to your faucet requires a massive investment in plants, reservoirs, pumpstations and distribution pipes and the dedication of a highly skilled workforce to keep it all operating and well maintained.

As water flows down the Bow and Elbow rivers, its quality can deteriorate as manmade pollutants from urban and rural runoff as well as naturally occurring organisms enter the water, making it unsafe for human consumption. Some of the naturally occurring organisms may include Giardia and Cryptosporidium. That’s why, appearances aside, even water from mountain rivers has to be treated before it can be safely used for human consumption.

Treatment of water for Calgary’s residents and businesses starts at the Glenmore and Bearspaw water treatment plants. The design of these facilities is based on a multiple barrier approach. Each barrier is designed to remove impurities. The basic process consists of four steps; 1) the water as it enters the plants is disinfected with chlorine to help destroy harmful microorganisms; 2) alum is added to the water to help remove fine organic particles that make the water cloudy. Alum helps the particles clump together and settle out; 3) water is then passed through filters made of sand, gravel and anthracite. These layers screen out remaining particles and microorganisms; 4) chlorine is added to the filtered water as it leaves the treatment plant. This ensures that the water stays disinfected as it is distributed to homes and businesses.

The above is not the entire story. To ensure that breakdowns do not occur, water is tested at numerous points and at frequent intervals throughout the plants and distribution system. Health Canada and Alberta Environment establish the regulations and guidelines to be adhered to by municipalities. Not surprisingly, the employees of Calgary Waterworks ensure that the water that arrives at your faucet exceeds these standards.

 
       
 
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