Culture tail water treatment system

Abstract

The invention relates to a culture tail water treatment system. The system comprises a main sedimentation tank, an auxiliary sedimentation tank, a biological treatment internal circulation small system and the like which are sequentially connected, and the biological treatment internal circulation small system comprises: a biological membrane treatment tank; a tank body containing phytoplankton, aquatic plants, fungi and benthic organisms; a buffer pool which is adjacent to the biological membrane treatment tank, wherein when the tail water in the biological membrane treatment tank exceeds a threshold value, the tail water in the biological membrane treatment tank flows into the buffer pool, and a water lifting device is arranged in the buffer pool; and an oxygenation pool which is adjacent to the biological membrane treatment tank and the buffer pool, wherein oxygenation equipment is arranged in the oxygenation pool, the oxygenation pool is used for receiving tail water flowing out ofthe water lifting device in the buffer pool, and the bottom of the oxygenation pool is further communicated with the bottom of the biological membrane treatment tank. The culture tail water treatmentsystem has the advantages that solid impurities, nitrogen and phosphorus and harmful microorganisms in the tail water are reduced by establishing 'precipitation-biological nitrogen and phosphorus removal-disinfection', so that the aquaculture tail water is treated and recycled, and finally, up-to-standard discharge or recycling of the tail water is realized.

Description

technical field [0001] The invention relates to the field of farming, in particular to a farming tail water treatment system. Background technique [0002] Traditional aquaculture tail water is mostly treated by sedimentation and filtration (such as "three pools and two dams"). (sedimentation tank), filtration (such as filter dam or biofilm treatment), and the filtered sewage is discharged directly; the sediment is removed after a period of time and used directly as fertilizer. First, because the sediment is not removed from the system in time, the sediment will continue to release nitrogen and phosphorus, which will cause the nitrogen and phosphorus content of the water body to increase continuously; second, if the tail water flow is too large (such as traditional eel farming, high-level pond shrimp farming, etc. ), the biofilm treatment system in the dam is not perfect, or the time is not enough or after the system collapses, it is often difficult to achieve the "ideal" t...

AI Technical Summary

Problems solved by technology

First, because the sediment is not removed from the system in time, the sediment will continue to release nitrogen and phosphorus, which will cause the nitrogen and phosphorus content of the water body to increase continuously; second, if the tail water flow is too large (such as traditional eel

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