AquaBlend Potable Water Mixing Systems provide mixing of water treatment process basins and water storage tanks using impurity-free compressed air. In potable water storage tanks, mixing is an effective tool for meeting regulatory requirements for control of microbial contaminants and reduction of disinfection byproducts (DBPs). AquaBlend can also provide mixing of water treatment plant sludge tanks to maintain homogeneity and in powdered activated carbon (PAC) contactors to improve removal efficiency of unpleasant taste and odor compounds.
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AquaBlend provides mixing in water storage tanks by firing programmed short bursts of impurity-free compressed air through patented engineered nozzles. The controller air injection valve intermittently fires to blend from the tank bottom to the water surface. The large bubbles create a distinctive mixing pattern, or “tank roll.” The blending parameters of the controller may be adjusted by the operator for optimal mixing and power utilization, or the automated instrumentation feedback control system may be used.
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Potable water storage tanks are kept mostly full (greater than 70%) in order to maintain pressure and meet peak demand. Daily volume levels rarely fluctuate more than 10%, creating stagnant water and thermally stratified layers. Aged water can lose its disinfectant residual, resulting in bacterial regrowth and waterborne illnesses.