Combined mixed-cell and raceway aquaculture device, system and method of use thereof, and method for growing fish thereby

A subsystem for water purification, comprising:

• one or more filters for removing solid material;
• one or more pumps for lifting water;
• one or more aerators for exchange of gas dissolved in the water;
• one or more raceway tanks;
• one or more moving bed bioreactors;
• and
• an oxygen supersaturation unit configured to oxygenate the water leaving the water purification subsystem by applying oxygen to the water leaving the water purification subsystem at a pressure below 1.5 bar;
• wherein the one or more pumps are configured to lift the water through a desired height either before or after the water has passed through at least one of the one or more filters,
• wherein the one or more aerators degas the water after it has passed through the at least one of the one or more filters and through the one or more moving bed bioreactors,
• wherein the moving bed bioreactors contact the water either before or after the water has passed through the at least one of the one or more filters but before the water contacts the one or more aerators;
• wherein the subsystem is configured to discharge the oxygenated water into each of first ends of the one or more raceway tanks, each of the one or more raceway tanks having a plurality of virtual cells produced by rotating hydraulic flow patterns disposed along a corresponding raceway tank, via a plurality of discharge manifolds;
• wherein the oxygenated water flows along a length of the one or more raceway tanks in a laminar flow pattern;
• and
• wherein the subsystem is configured to receive a first portion of deoxygenated water in the one or more raceway tanks from each of second ends of the one or more raceway tanks and a second portion of the deoxygenated water in the one or more raceway tanks from a plurality of drains each disposed in a respective cell of the plurality of virtual cells, the first ends being opposite of the second ends.