Intensive Flow Through to Waste Systems

Water either flows by gravity or is pumped through the aquaculture venture with minimal treatment of effluent waters. Water is not recirculated and treated within the farming operation. In some cases, incoming water may be filtered (and sterilised) and effluents filtered sterilised and nitrogen wastes removed.

An example of flow through aquaculture in Europe is the use of diverted river and spring flows through raceways to rear salmon, water pumped through raceways or tanks for abalone and salmon, or the use of net pens in hydro channels. The water flowing through the farm brings oxygen and flushes wastes away. 

The practice of intensive flow through aquaculture is both popular and widespread around the globe and is applied successfully to a wide range of species. 

Flow Through Info

One issue associated with flow through aquaculture is waste and nutrient removal before the water is returned to natural waterways. A plethora of technologies have been developed to achieve environmentally sustainable operations. The removal of dissolved nitrogen and other nutrients in purpose built wetland systems is popular.   

Solids Removal

Solid waste removal is reviewed at the following link: Solids management and removal for intensive land-based aquaculture production systems

Solids management and removal for intensive land-based aquaculture production systems