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

A technology for hair algae and grass carp, applied in the field of algae content, 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

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of high operating cost and many by-products in the exist...

Method used

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specific Embodiment approach 1

[0005] Specific embodiment 1: The method of this embodiment is: putting grass carp in a eutrophic water body, the amount of grass carp is 20-100g per cubic meter of water, and the weight of a single tail of grass carp is 20-100g; placing the grass carp in the water body where the grass carp is put Floating cages, open net cages made of stainless steel wire mesh with a hole diameter of 4-6mm, floating net cages with a length×width×height dimension of 1~2m×1~2m×1~2m, floating net The four corners of the upper and bottom of the box are fixed with floats so that the side wall of the floating cage is 0.2~0.4m above the water surface. Two pieces of nylon wire mesh parallel to the side walls and perpendicular to the upper and lower bottoms are fixed inside the floating cage. The left and right sides and bottom of the nylon mesh are sewn together with the side walls and bottom of the floating cage respectively. The distance between the two pieces of nylon mesh and the side walls of the fl...

specific Embodiment approach 2

[0006] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the amount of grass carp in the eutrophic water body is 25~55g / m 3 . The other methods are the same as in the first embodiment.

specific Embodiment approach 3

[0007] Specific embodiment three: This embodiment is different from specific embodiment one in that the amount of grass carp in the eutrophic water body is 30-50g / m 3 . The 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 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 grass carp is cultured in eutrophication water body with a culturing density of 20~100 g/m<3> and a single weight of 20~100 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, 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. The present invention make the best of the food habit difference between grass carp and daphnia hyaline, and comparing with the prior art, the present invention is simple and easy, economy and shortcut, and has high efficiency and convenient operation.

Description

Technical field [0001] The invention relates to a water treatment method, in particular to a method for synergistically controlling the content of algae in the eutrophic raw water of a water plant by using multiple freshwater aquatic organisms. Background technique [0002] Water body eutrophication is the water body effect caused by the excessive input of nutrients such as nitrogen and phosphorus. It is mainly manifested by the excessive growth of algae in the water. At the same time, it is accompanied by a series of water quality and ecological changes, resulting in a decrease in water transparency and deterioration of water quality. The eutrophic raw water greatly affects the normal production of water plants. [0003] Among the existing algae removal methods, there are chemical methods using strong oxidants and algaecides as algae removal methods, as well as physical and chemical methods represented by air flotation, and physical methods such as microfiltration and membrane f...

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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