The additional advantage of square vs round is that a square tower design allows the owner the option of utilizing both “Random Pack” and “Slat Tray” type for the media. So for projects with high concentrations of iron, hydrogen sulfide, or other minerals or potentially higher bacteria growth, the owner may wish to switch or use slat tray media to avoid higher operating costs and service cleanings.
Both round and square aerators and degasifiers can be manufactured in aluminum, fiberglass, or stainless steel so the material selection is not a variable when deciding what type of tower to select for your plant.
Another benefit for the square design over round is that most square towers come equipped with larger service doors and access hatches because of the ability to accept slat tray media. This provides easier access inside of the tower for cleaning and services when needed. Round towers are typically equipped with round access man ways so entering the tower and removing media is much slower and requires more labor costs.
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Related Blog: Why Select One Type of Degasifier Over Another Type?