InPhase - Ultrasonic Antifouling Solution

A major challenge and cost driver today in aquaculture is the control of biofouling, which is the accumulation and growth of marine organisms on submerged surfaces. Not only cage nets, but also other submerged surfaces, such as the feed barge and cage structures, need to be cleaned regularly. Growth of organisms on net cages can lead to reduced solidity of the net and can negatively affect fish growth, health and welfare [1-2]. Current biofouling maintenance includes underwater high pressure cleaning of the nets, which is a costly and time-consuming task. Control of biofouling is estimated to cost 5-10% of aquaculture production costs, which is equivalent to $1.5-3 billion per year (2012 estimate) [1]. In addition, limited cleaning of rigid structures poses a risk for worsening of biofouling rates [3]. The environmental concern about chemical copper based anti-fouling technology (copper based paint and copper based protection of nets) is also increasing. A recent report indicates acute poisonous levels of copper for sea animals present under fish-farming facilities [4], posing a clear environmental threat.