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Silver carp, bighead carp and cladophora united algae control method

A technology of claste algae and bighead carp, applied in the field of water treatment, can solve the problems of high operating cost and many by-products

Inactive Publication Date: 2007-09-19
HARBIN INST OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a joint algae control method for silver carp, bighead carp and Clado algae in order to solve the problems of high operating cost and many by-products in the existing algae control methods

Method used

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specific Embodiment approach 1

[0005] Specific embodiment one: the method of this embodiment is: throw silver carp and bighead carp in eutrophic water body, and the stocking density of silver carp and bighead carp in water body is 60~100g / m 3 , the stocking ratio of silver carp and bighead carp is 3:1~4:1, and the weight of single tail of silver carp or bighead carp is 60~200g; set floating cages in the eutrophic water body where silver carp and bighead carp are stocked, The floating cage is an open cage made of stainless steel wire mesh with an aperture of 4-6mm. The length x width x height of the floating cage is 1-2m x 1-2m x 1-2m. Floats are fixed so that the side wall of the floating cage is 0.2-0.4m above the water surface. Inside the floating cage are fixed two pieces of nylon mesh parallel to the side wall and perpendicular to the upper and lower bottoms with an aperture of 1-2cm. The left and right sides and the bottom of the screen are sewed together with the side wall and bottom of the floating c...

specific Embodiment approach 2

[0006] Specific embodiment two: In this embodiment, the density of silver carp and bighead carp in eutrophic water body is 60~80g / m 3 . Other methods are the same as in the first embodiment.

specific Embodiment approach 3

[0007] Specific embodiment three: In this embodiment, the density of putting silver carp and bighead carp in eutrophic water body is 80~100g / m 3 . Other methods are the same as in the first embodiment.

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Abstract

The present invention relates to a method of cooperative control of alga in a water body comprising silver carp, bighead carp and cladophora, which relates to a water treatment method and solves the problem of high operating cost and much of the by-products of the current alga control method. In the present invention silver carp and bighead carp are cultured in eutrophication water body with a culturing density of 60~100 g / m<3>, a culturing ratio of 3:1~4:1 and a single weight of 60~200 g; a floating net cage is arranged in the eutrophication water body, which is an open net cage made from stainless wire net having an aperture of 4~6 mm and has a length*width*height size of 1~2m*1~2m*1~2m, besides, the four corners of the upper bottom of the floating net cage are provided with floater, by which the side walls of the floating net cage can overtop the water level by 0.2~0.4 m. The present invention is simple and easy, and can reduce the alga content and the trophic level in raw water of water plant effectively so as to solve the problem of that the eutrophication high algae-laden raw water affects the conventional treatment in current water plant, to reduce the cost and improve the water quality.

Description

technical field [0001] The invention relates to a water treatment method, in particular to a method for synergistically controlling algae content in eutrophic raw water of a water plant by using a variety of freshwater aquatic organisms. Background technique [0002] Eutrophication of water body is a water body effect caused by excessive input of nutrients such as nitrogen and phosphorus. It is mainly manifested in the excessive growth of algae in water, accompanied by a series of changes in water quality and water ecology, resulting in a decrease in water transparency and deterioration of water quality. Eutrophication of raw water greatly affects the normal production of waterworks. [0003] Among the existing algae removal methods, there are chemical methods using strong oxidants and algicides as algae removal methods, physical and chemical methods represented by air flotation, and physical methods such as microfiltration and membrane filtration. The common advantage of c...

Claims

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Application Information

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IPC IPC(8): C02F3/00C02F3/32
CPCY02W10/37
Inventor 崔福义范振强马华何文杰阴沛军王振江贾柏樱
Owner HARBIN INST OF TECH
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