Control system for fish farming in recirculation systems mainly consisting of sensors (probes), programmable logic control (PLC), input panel and monitors

Bioreactors for biological sewage treatment, especially nitrogen elimination, by using substances (fixed and fluidized beds) as settling area for micro-organisms; apparatus for the separation of solids, mainly consisting of tanks with in- and out-flow connections for the water to be treated, with built-in movable screens with equipment for the cleaning of the screens with air and/or water and equipment to create an air/water mixture