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: This technical note presents data on the efficacy of an air injection system for zebra mussel removal from hard substratum. A preliminary study was undertaken to demonstrate the efficacy of air injection techniques for removing zebra mussels from colonized substratum and intake orifices. Comparisons were made of an air diffuser without a facing plate and one with a facing plate to determine which design removed zebra mussels more efficiently. The concept and principle of operation relies upon creating an energetically inhospitable environment for the zebra mussels. Air bubbles agitate the soft tissue siphon and prevent mussels from opening their valves for feeding. The two-phase alternating frictional force of water and air bubbles demands continual counteraction by the byssus-foot apparatus, resulting in an unacceptable energy demand in order for the mussel to stay in place.

Use of an Air Injection System to Control Zebra Mussels. May 1994.