Case Study

Omaha Municipal Utility District


The Omaha Municipal Utility District initiated a major facility improvement project to enhance the recarbonation process of its 160 million-gallon per day (~606,000 m3) water treatment plant, installing a new pressurized CO2 feed system and static mixers to normalize the pH of the water after the lime softening process.

The municipal water treatment plant uses finished water as the carrier stream for the facility’s recarbonation process, directing a portion of the plant’s finished water to the process. Consequently, one of the key objectives for the improvement project focused on the need to minimize the quantity of carrier water required by the recarbonation process. Other operational objectives included the ability to stabilize the pH levels within three minutes and a desire to increase overall efficiency of water treatment facility.

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