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Bighead carp, grass carp, cladophora and daphnia hyaline multi-biology cooperated algae control method

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

Inactive Publication Date: 2007-09-19
HARBIN INST OF TECH
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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 synergistic algae control method for bighead carp, grass carp, Clata and hyaline multi-organisms 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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Effect test

specific Embodiment approach 1

[0005] Specific embodiment one: the method of the present embodiment is: one, the stocking of bighead carp and grass carp: in the eutrophication water body, the feeding amount of bighead carp is 60~100g / m 3 , the weight of a single tail of bighead carp is 60-200g; the dosage of grass carp in eutrophic water is 20-60g / m 3 , the single tail weight of grass carp is 30-100g; the weight ratio of bighead carp and grass carp is 3:1-4:1. Net cage, the length × width × height of the floating net cage is 1~2m×1~2m×1~2m. Two pieces of nylon mesh with a diameter of 1 to 2 cm parallel to the side wall and perpendicular to the upper and lower bottoms are fixed inside the cage. Together, the distance between two pieces of nylon wire mesh and the side walls of the floating cage parallel to it is 30-35 cm, and the nylon wire mesh is attached to the growth of Cladophora, and the density in the cage is 10-50 cm. A / L of transparent daphnia. Stocking bighead carp and grass carp in this embodime...

specific Embodiment approach 2

[0006] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the amount of bighead carp in eutrophic water body is 60~80g / m 3 .

specific Embodiment approach 3

[0007] Specific embodiment three: the difference between this embodiment and specific embodiment one is that the feeding amount of bighead carp in eutrophic water body is 80~100g / m 3 .

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Abstract

The present invention relates to a method of cooperative control of alga in a water body comprising bighead carp, grass carp, cladophora and daphnia hyaline, 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 bighead carp is cultured in eutrophication water body with a culturing density of 60~400 g / m<3> and a single weight of 60~200 g; grass carp is also cultured in eutrophication water body with a culturing density of 20~60 g / m<3> and a single weight of 30~100 g; the ratio of bighead carp to grass carp is 3:1~4:1; 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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Patent Type & Authority Applications(China)
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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