Fish and shrimp fry raising water treatment method and device

Abstract

The invention discloses a fish and shrimp fry raising water treatment method and device, wherein the method comprises the following steps: (1) raw water passes through a grid and a security filter successively, and sediments and solid particles in the raw water are intercepted; (2) then the treated raw water is transported to an MBR device, the MBR device is a built-in type, a membrane assembly adopts antibacterial pollution-proof hollow fiber ultrafiltration membranes, aeration is continuously carried out in an MBR membrane pool by an aeration device, water in the MBR membrane pool is pumped to a water generation tank by a self suction pump and is treated by the MBR device, the removal of viruses in the water is 99.9%, the bacterial removal rate is 99.99%, and dissolved oxygen in the water is 3-6 mg / L; and (3) the water quality in the water generation tank is detected, the water quality pH and salinity are adjusted to meet the requirements of fish and shrimp culture. The dissolved oxygen quantity in the water for fish and shrimp fry raising is increased, bacteria and viruses in the water body are effectively removed, at the same time, a certain removal effect on ammonia nitrogen and organic matters in the water is achieved, and the use of chemical agents is avoided.

Description

[0001] Technical field: [0002] The invention relates to the technical field of aquaculture water treatment, in particular to a water treatment method for fish and shrimp nursery and a device thereof. [0003] Background technique: [0004] Fish and shrimp farming is an aquaculture project with high economic value in aquaculture. It starts with fish and shrimp breeding, and the water quality of aquaculture water is a key factor affecting the emergence rate at this stage. In the traditional aquaculture process, river water or seawater is used as raw water, which is directly used as aquaculture water after sedimentation and disinfection. However, with the deterioration of river water and sea water quality, harmful substances such as ammonia nitrogen and nitrite nitrogen in the water body appear or exceed the standard, and pathogenic bacteria in the water multiply. The pathogenic bacteria not only consume dissolved oxygen in the water body, but also easily cause group sex of fish...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a water treatment method for fish and shrimp nursery, which solves the problems of complex water treatment process, low dissolved oxygen content in the treated water, and easy pathogenicity caused by the existing chemical sterilization process. The resistance of bacteria and the lack of treatment of ammonia nitrogen and nitrite in the treatment process

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