Low-carbon zero-emission plant circulation water breeding system based anaerobic denitrification

Abstract

The invention discloses a low-carbon zero-emission plant circulation water breeding system based on anaerobic denitrification. The low-carbon zero-emission plant circulation water breeding system comprises a circulation water breeding pool, a microfiltration machine, a water pump, a denitrification device, a CO2 reducing drip biological filter, a movable biofilter, an ultrasonic sterilizing sterilizer, an efficient pure oxygen mixer and a settling pond; an anaerobic denitrification device is a cylinder or a cuboid, solid denitrification is utilized to release a carbon source as biological stuffing and is used as a carrier of anaerobic denitrification bacteria, and meanwhile, through biodegradation, the carbon source and transfer electrons can be provided for denitrification; a settling pond sewage collecting system is used for collecting periodically drained sewage of a vertex solid-liquid separator, the microfiltration machine and a biofilter, liquid supernatant of the settling pond sewage collecting system can be used for a circulation water breeding system again, and settling liquid can be squeezed as vegetable organic fertilizer. Zero drainage of the plant circulation water breeding system is achieved in real sense, and the low-carbon zero-emission plant circulation water breeding system is applicable to high-density plant circulation water breeding of all freshwater and seawater high-quality fish varieties.

Description

technical field [0001] The invention relates to the field of closed industrial circulating aquaculture, in particular to a low-carbon zero-emission industrial circulating aquaculture system based on anaerobic denitrification. Background technique [0002] With the pressure of the environment and environmental protection, lakes and offshore fish raft cages have been dismantled, and straight-line aquaculture ponds have been shut down. The pressure on aquaculture is also increasing. Closed factory recirculating aquaculture is a sustainable development model that can realize water recycling and no sewage discharge. [0003] At present, there are many kinds of industrial recirculating aquaculture systems developed and applied at home and abroad, but almost none of them meet the zero discharge standard in the true sense; first, the system design is not mature enough and the equipment stability is poor, resulting in ammonia nitrogen and nitrite nitrogen in the water body If it exc...

AI Technical Summary

Problems solved by technology

[0003] At present, there are many kinds of industrial recirculating aquaculture systems developed and applied at home and abroad, but almost none of them meet the zero discharge standard in the true sense. First, the system design is not mature enough and the equipment stability is poor, resulting in ammonia nitrogen and nitrite nitrogen in the water. If it exceeds the standard, it must be solved by changing a large number of water, resulting in the direct discharge of a large amount of aquaculture sewage; second, the lack of a mature anaerobic denitrification system device, the accumulation of nitrate produced by the nitrification reaction, the accumulation of nitrate to a certain amount will cause poisoning to fish The impact must be solved by changing a large number of water; at present, there is also a fish and vegetable symbiosis system to solve the problem of nitrate accumulation in the water body, which is solved by vegetable absorption. Large, it is difficult to operate in actual production

[0004] All in all, the current situation seriously restricts the promotion and application of domestic recirculating aquaculture

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