City of Waxahachie
Plummer designed a new 20 million gallons per day (mgd) microfiltration membrane water treatment plant (WTP) shared by the City of Waxahachie and Rockett Special Utility District. The WTP includes coagulation, flocculation, sedimentation with tube settlers, granular activated carbon (GAC) contactors (designed for the adsorption of total organic carbon and Geosmin), microfiltration membranes, advanced ultraviolet oxidation using hydrogen peroxide, storage, and pumping. A 3,000-lb-per-day hypochlorite generation system was designed that included solution water pretreatment, brine-making, generation, storage, and solution pumping systems. Designed initially to provide 20 mgd of treated water, the major process components and the chemical storage tanks were designed conservatively so that the plant can easily be uprated to 25 mgd by adding membranes and UV equipment. The site is planned for buildout capacity of 80 mgd, and the membrane building was designed to accommodate an additional 20 mgd of membrane capacity.
The on-site hypochlorite generation system and the UV oxidation/hydrogen peroxide process are the largest such facilities in Texas.
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