Integrated water treatment system for treating both water for seawater recirculating aquaculture and tail water

Abstract

The invention provides an integrated water treatment system for treating both water for seawater recirculating aquaculture and tail water. The integrated water treatment system comprises a sewage collection tank, a physical filtering device, an air floating pool, an electrode-suspended filler coupled biofilter treating unit, and an ozone-ultraviolet combined pathogenic microorganism killing unit which are connected in sequence, wherein the sewage collection tank, the physical filtering device, the air floating pool, the electrode-suspended filler coupled biofilter treating unit, the ozone-ultraviolet combined pathogenic microorganism killing pool are all connected with a sludge concentration-dehydration device, and the ozone-ultraviolet combined pathogenic microorganism killing pool is also connected with a culture pond. The integrated water treatment system of the invention has the characteristics of high water treatment efficiency and continuous maintenance of the high water quality of an aquaculture system, and the water circulation utilization rate of the system can reach 95% to 98%; and the integrated water treatment system can fully meet the demand for healthy culturing of cultured objects, has a tail water treatment function, and allows the tail water to be discharged after reaching the standard.

Description

[0001] 【Technical field】 [0002] The invention relates to an integrated water treatment system for seawater circulating aquaculture and tail water treatment. [0003] 【Background technique】 [0004] Recirculating aquaculture has developed rapidly in recent years, and the scale of aquaculture is expanding day by day. The types of seawater recirculating aquaculture mainly include grouper, turbot, large yellow croaker and Litopenaeus vannamei, etc., which have the advantages of water saving, land saving, high yield, high efficiency and high quality and safety of aquatic products. Although many daily water recycling rates can reach more than 90%, even the highest water recycling rate at the international leading level can reach 97%. However, generally there is still about 10% of high-concentration waste water every day (mainly in the water treatment process, the backwash water and sewage of the treatment unit, containing high-concentration nitrogen and phosphorus pollution such a...

AI Technical Summary

Problems solved by technology

Due to limited land area and high treatment costs, many farms failed to carry out tail water discharge treatment, polluting the surrounding coastal sea environment or facing the problem of being forced to stop production due to environmental protection failure

[0005] The current water treatment system for recirculating aquaculture is mainly based on the biological characteristics and ecological habits of the aquaculture objects (such as fish and shrimp) and the safe concentration requirements for the main factors of water quality such as ammonia nitrogen and nitrite nitrogen. Treatment process and construction of corresponding water treatment units, so that the water quality of circulating aquaculture water can meet the healthy breeding needs of aquaculture objects, and realize the healthy growth of aquaculture objects, without the treatment function of tail water discharge up to standard

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