Mountainous area flowing water culture cyclone sewage collection multi-stage precipitation tail water treatment method

Abstract

The invention discloses a mountain area running water culture rotational flow sewage collection multi-stage precipitation tail water treatment method, which comprises the following steps: carrying out layering treatment on culture tail water to realize direct overflow of the culture tail water with low excrement residual feed content from the upper part; according to the present invention, the breeding tail water with the high manure residual feed content is deposited at the lower part, is discharged after the treatment, is mixed with the breeding tail water with the low manure residual feed content, and is discharged after the ecological treatment, and the characteristics of large water flow, high breeding density, high unit area yield, secondary or repeated water use, direct tail water discharge and the like are provided for the traditional running water breeding mode in the mountainous area; cultivation tail water is treated and then discharged after reaching the standard, the method is a main measure for ensuring healthy and sustainable development of the running water aquaculture industry in the mountainous area, and tail water treatment is a process for repairing a water body before the tail water is recycled or discharged. The invention aims to remove or reduce solid particles, soluble organic matters, nitrogen and phosphorus nutrients and other culture pollutants in a water body, and has the advantages of strong dirt collecting capacity, simplicity in operation, convenience in management, low manufacturing cost and operation cost and suitability for running water culture in mountainous areas.

Description

technical field [0001] The invention relates to the technical field of agricultural flowing water freshwater aquaculture, in particular to a method for treating the tail water of mountainous flowing water aquaculture swirl collection and multi-stage sedimentation. Background technique [0002] Guizhou Province is rich in cold water resources, with excellent water quality and no pollution. It has unique natural conditions for the development of cold water (sub-cold water) fish such as sturgeon and salmon. Since the introduction and popularization of the sturgeon farming technology in mountainous areas, the farming area in Guizhou Province has continued to increase, and the proportion of output in the country's total output has continued to rise. [0003] In order to improve environmental protection, fishery development must adhere to ecological priority and strengthen resource conservation. It is required to actively change the development mode of the aquaculture industry, a...

AI Technical Summary

Problems solved by technology

[0005] The tail water after breeding cannot be directly discharged into the river because it contains a large amount of feces and residual bait. Due to the size and shape of the manure residual bait, the aperture of the sieve plate should not be too large, and the screen size and inclination of the plane sieve should be set to achieve a water flow of 0.01-0.03m 3 / s is appropriate. However, when the water flow rate of running water culture is too large, the area of ​​the sieve plate can only be increased to achieve the water flow rate. Due to the environmental restrictions of mountain aquaculture, the setting of the sieve plate is greatly restricted, resulting in the limitation of the sieve plate technology. The problem that the adoption cannot be well adapted to large-flow freshwater aquaculture

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