In the summer of 2018, the City of Chestermere, AB commissioned their new Lift Station 13 to pump sewage to the Bonnybrook wastewater treatment plant in Calgary and relieve pressure on their already overloaded sanitary sewer system. A new challenge emerged when the lift station was brought online due to the 5.5 kilometers the sewage had to travel to Calgary’s collection system tie-in. When sewage spends a long time in a transfer pipe, conditions can go anaerobic and large amounts of Hydrogen Sulfide (H2S) can be formed, leading to odour and corrosion concerns.
BlueInGreen’s super-saturated dissolved oxygen collection system (SDOX-CS®) solves this issue by taking a side-stream from the lift station wet well and supersaturating it with Oxygen. This supersaturated side stream is then returned to the sewer force main where it supplies enough residual oxygen to avoid unwanted anaerobic conditions.
As part of this project, BlueInGreen embarked on a 12-month demonstration trial by sending one of their containerized SDOX-CS® units to site. During this trial, the oxygen supplied by the SDOX-CS® unit was able to keep the H2S levels down to an average of just over 1 ppm, when historical H2S peaks of over 180ppm had been recorded before bringing the SDOX-CS® unit online. The trial concluded successfully in December 2021, and led to the client making a capital purchase of the onsite unit.
Combat your collection system odour and corrosion problems with BlueInGreen technology.