Higee aeration system

Another variation of the PTA process is the Higee aeration system. To achieve the necessary air and water mix, water pumped into the center of a spinning disc of packing material and air is pumped countercurrently toward the center from the outside of... 

PTA systems are designed so that water cascades, which imparts the necessary turbulence and air-to-water interface. Tray-type towers impart the turbulence to water by using several layers of slats to mix water with air. Innovations in PTA are reflected in the newest additions to the tower aeration system. Emerging aeration techniques include the catenary grid and Higee systems, which are discussed below. 

Table 11 compares various aeration systems such as PTA, diffused aeration, multiple-tray aeration, mechanical aeration, catenary grid, and Higee aeration for operations, maintenance, and energy consumption (4,6,15-18,20). All aeration systems do not require high operational skills, but the major difference in these systems is in energy consumption. Multiple-tray and mechanical aeration require the lowest level of operational skill, maintenance, and energy consumption therefore, for small systems these two aeration systems will have the lowest operational cost. 

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