Silver carp, bighead carp, grass carp, cladophora and daphnia hyaline cooperated algae control method

A technology of claste algae and silver carp, which is applied in the field of water treatment, can solve the problems of the impact of conventional treatment processes, the decrease of water transparency, and high production costs, and achieve the goal of reducing algae content and nutrient levels, reducing water nutrient levels, and extremely low cost Effect

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

[0005] The purpose of the present invention is to solve the problem that the transparency of the water body decreases and the water quality deteriorates due to the excessive growth of algae in the water, and it is especially suitable for solving the problem that

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0010] Specific embodiment 1: The steps of controlling algae in this embodiment are as follows: stocking silver carp, bighead carp and grass carp in eutrophic water and constructing floating cages; the nylon silk nets in the floating cages are attached with clitoris, and the floating cages There is a transparent minaret inside.

Example Embodiment

[0011] Embodiment 2: In this embodiment, the stocking density of silver carp in the eutrophic water body is 60-100 g / m 3 , The stocking ratio of silver carp and bighead carp is 3~4:1, the single tail weight of silver carp and bighead carp is 60~200g, and the stocking density of grass carp is 20~60g / m 3 , The single tail weight of grass carp is 30-100g. Others are the same as the first embodiment.

[0012] A large number of experiments have proved that stocking silver carp, bighead carp and grass carp according to this data can effectively reduce the nutrient content such as nitrogen and phosphorus in the water body, control the number of planktonic algae and clary algae, and have a more significant removal effect on blue algae in the high algae stage. The polyculture of silver carp and bighead carp can make comprehensive use of the differences in feeding habits of silver carp and bighead carp, so that planktonic algae, zooplankton and detritus in eutrophic water can be fully filte...

Example Embodiment

[0013] Specific embodiment 3: The stocking density of silver carp in this embodiment is 65~90g / m 3 . Others are the same as the second 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, grass carp, cladophora and daphnia hyaline, which relates to a water treatment method and solves the problem of water quality depravation caused by the descent of water body transparency due to the hypertrophy of alga. The method comprises the steps of that: silver carp, bighead carp and grass carp are cultured in eutrophication water body, and a floating net cage is arranged therein; cladophora attached grows in the nylon wire net of the floating net cage, and daphnia hyaline grows inside of the floating net cage. The present invention has the advantages of easy operation, high efficiency, economy and shortcut and easy control, and can be popularized on a large scale. In the present invention, the removal percentage of phosphor is 60~66%, the average removal percentage of alga is 68~73% and the average removal percentage of chlorophyll is 63~66%.

Description

technical field [0001] The invention relates to a water treatment method, and more specifically relates to a method for synergistically controlling algae content in eutrophic raw water of water plants by utilizing various freshwater aquatic organisms, which is suitable for eutrophic high algae raw water of water plants. 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 and high algal raw water greatly affect the normal production of waterworks. [0003] The existing algae removal methods in water treatment mainly include: dosing chemical agents to remove algae, microfiltration to remove algae, air flotation to remove algae, microorganisms to ...

Claims

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Application Information

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IPC IPC(8): C02F3/00C02F3/32C02F3/34
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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