Industrialized fish and algae farming system and method with recirculating water

An industrialized fish and algae farming system with recirculating water, comprising:

• a fish and algae farming system, a fiber rotary disc filter system, and a magnetic loading flocculation system:
• wherein the fish and algae farming system comprises a fishpond body, a water inlet device, and a water outlet device:
• the fiber rotary disc filter system comprises a first fiber rotary disc filter device and a second fiber rotary disc filter device;
• the first fiber rotary disc filter device is located in a first filter pond:
• the second fiber rotary disc filter device is located in a second filter pond;
• the first fiber rotary disc filter device and the second fiber rotary disc filter device each comprise a fiber rotary disc filter, a backwash device, a sludge discharge device, and a supporting electric control device;
• the first fiber rotary disc filter device and the second fiber rotary disc filter device have equal filtration flux for same aquaculture sewage:
• filtering pores of filter cloths in a first fiber rotary disc filter have a diameter ranging from 15 μm to 30 μm:
• filtering pores of filter cloths in a second fiber rotary disc filter have a diameter ranging from 1 μm to 5 μm:
• a filtered water collecting tank is arranged between the first filter pond and the second filter pond:
• the filtered water collecting tank is provided with a filtered water outlet:
• the first fiber rotary disc filter device and the second fiber rotary disc filter device share the filtered water collecting tank, the filtered water outlet, a back suction pump and a drain outlet:
• the water outlet device of the fish and algae farming system communicates with the first filter pond and the second filter pond through pipelines, respectively:
• the filtered water outlet of the fiber rotary disc filter system communicates with the water inlet device of the fish and algae farming system through a pipeline:
• the drain outlet of the fiber rotary disc filter system communicates with a water inlet of the magnetic loading flocculation system through a pipeline:
• the magnetic loading flocculation system comprises a mixing pond, a coagulation pond, a flocculation pond, a sedimentation pond, a magnetic powder recovery device, and a sludge dewatering device:
• the sedimentation pond of the magnetic loading flocculation system is provided with a clarified water outlet, and the clarified water outlet communicates with the first filter pond and the second filter pond through pipelines.