8/14/2023 0 Comments Pinpoint personnel plant cityWhen it comes to odor, however, it’s incredibly difficult to pinpoint a source without solid data. There was only about one a month, but it was consistent, especially in warm weather when many more people were enjoying the outdoors. Development encroached, and by the mid-90s, complaints about odor led to the covering of those clarifiers. We’re working through technology selection.”īuilt in 1960, Fish Creek’s primary clarifiers were initially uncovered, and the headworksĭischarge was not scrubbed. “Right now, it looks like aerobic granular sludge is preferred, but that’s debatable,” Colbran says. This is one of the main drivers of the upcoming plant upgrade, whose new process has yet to be identified. It does not remove ammonia, causing occasional noncompliant effluent into the Bow River. You’ve got everything from animal processing, food and beverage manufacturing, industrial machine shops, you name it,” on a gravity-feed system with a few lift stations.įish Creek uses a pure oxygen process. “There’s suspicion that a lot of the industrial waste doesn’t get mixed, and gets directed into the Fish Creek plant. And as the smallest plant, Fish Creek also gets the bulk of our industrial wastewater. “There’s still that 35 mgd going into Fish Creek on any given day,” explains Colbran, “but there are large trunks upstream of Fish Creek as well. But Pine Creek doesn’t currently have capacity to treat all that wastewater. A structure at Fish Creek diverts most of the flow in that system to the Pine Creek plant. The decades-old mystery would need to be solved, and soon.įish Creek shares a catchment with Pine Creek. “There’s a significant amount of public engagement required to upgrade and expand a plant like this,” says Kevin Colbran, the city of Calgary’s wastewater treatment plant manager. They realized there was no way popular sentiment would lean toward approving enlargement of a plant that already had an odor problem. But it also became clear that - at just 9 mgd - the Fish Creek plant would soon need to expand to keep pace with its siblings Bonnybrook at 91 mgd, and Pine Creek at 23 mgd. They of course wished to respond to their neighbors’ concerns, since these people were also their ratepayers. For years, they had tried to discern where the undeniable miasma was coming from, with frustrating results. City managers weren’t convinced the plant was the actual source of the odor, which they believed to be caused by H2S. Fish Creek Wastewater Treatment Plant is the smallest of three wastewater treatment plants in the metro area of about 1.4 million people.įor 40 years, citizens in surrounding neighborhoods have complained of odors they believed to be coming from the plant. Get Infrastructure articles, news and videos right in your inbox! Sign up now.Ĭalgary is the largest city in the western Canadian province of Alberta, about 230 miles north of the U.S.
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