City looks to oxygen for odor controlProblem: The city of Chestermere, Alberta, relies on Calgary municipal wastewater treatment plants. That requires extended force main for delivery. City leaders were concerned with odor control as Calgary maintained a hydrogen sulfide limit of 5 ppm at the monitoring station just upstream of its plants. The existing chemical odor-control program was expensive and required supply tanks and frequent truck deliveries, which sometimes bothered neighborhood residents. Untreated hydrogen sulfide levels exceed 300 ppm.Solution: Anue Water Technologies provided a demonstration trailer in a successful pilot test of oxygen treatment. It eliminated the odors and involved
