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Cladophora and transparent daphnia combined algae control method

A clastophyte and transparent technology, applied in the field of water treatment, can solve the problems of harming human health, limited treatment scale, and large investment in equipment, and achieve the effect of no harm to the human body, reducing algae content and nutrient level, and high water treatment efficiency

Inactive Publication Date: 2008-12-31
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for combined algae control of clastephora and hyaline hyaline, which can solve the problem of endangering human health by using chemical agents to remove algae; the problems of complicated operation and high cost of using microfilter and air flotation to remove algae; Algae killing methods such as ozone, ultraviolet light or laser have the problems of large equipment investment, high cost and limited treatment scale

Method used

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specific Embodiment approach 1

[0006] Specific embodiment one: the combined algae control method of Cladophora and Daphnia hyalinea of ​​the present embodiment is completed by the following steps: a, construct the floating cage; in the pre-sedimentation tank of the waterworks, it is made of a stainless steel wire mesh with an aperture of 3-8mm. mouth net cage, the length × width × height of the net cage is (1~2m)×(1~2m)×(1~2m), and two pieces of nylon wire mesh parallel to each other and perpendicular to the bottom of the net cage are fixed inside the net cage, nylon The distance between the screens and the distance between the nylon screen and the adjacent parallel cage side walls are respectively 33 cm. The nylon screen is sewed together with the bottom surface of the cage and the corresponding cage side walls respectively. The aperture of the net cage is 1-2cm. The four corners of the net cage are fixed with floats to form a floating net cage. The side wall of the floating net cage is 0.2-0.4m above the w...

specific Embodiment approach 2

[0007] Specific embodiment two: the difference between this embodiment and the specific implementation one is: in the a step of this embodiment, in the pre-sedimentation tank of the waterworks, the stainless steel wire mesh with an aperture of 5mm is used to make an open net cage, and the net cage is long × width × height are 1.5m × 1.2m × 1.6m respectively, the aperture of the nylon mesh is 1.5cm, the distance between the nylon mesh and the distance between the nylon mesh and the adjacent parallel cage side wall is respectively 33cm, the side wall of the floating cage is 0.3m above the water surface, the distance between two adjacent floating cages is 13 times the length or width of the cage, and the floating cages are arranged in a matrix. Adopting this technical scheme can not only prevent larger filter-feeding and herbivorous fish from destroying the hyaline daphnia in the cage and the bristle algae attached to the nylon wire mesh, but also make the water plant eutrophic an...

specific Embodiment approach 3

[0008] Specific embodiment three: the difference between this embodiment and specific implementation one is: in the a step of this embodiment, in the pre-sedimentation tank of the waterworks, the stainless steel wire mesh with the aperture is 4mm to make an open net cage, and the net cage is long ×Width×Height are 1.2m×1.2m×1.2m respectively, the aperture of the nylon mesh is 1.2cm, the distance between the nylon mesh and the distance between the nylon mesh and the adjacent parallel cage side walls are respectively 30cm, the side wall of the floating net cage is 0.2m above the water surface, the distance between two adjacent floating net cages is 11 times the length or width of the net cage, and the floating net cages are arranged in a matrix. Adopting this technical scheme can not only prevent smaller filter-feeding and herbivorous fish from destroying the hyaline daphnia in the cage and the bristle algae attached to the nylon mesh, but also make the waterworks eutrophic and h...

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Abstract

This invention discloses a joint control algae method of Cladophora and transparent algae involving a water disposal method, which comprises the following steps: preparing open to ambient air net cage with rustless steel silk net of bore diameter at 3-8mm in preformed precipitate pool of water supply works; fixing nylon twine net of cross-paralleling and verticalling with bottom of net cage on the top of net cage; setting bore diameter of nylon twine net at 1-2cm; constructing floating net cage with fixed float of quadrangle of the top of net cage; making side wall of floating net cage exceed waterborne at 0.2-0.4m; residing 3-4 weeks in the water body; growing up Cladophora on the nylon twine net; making transparent algae natural grow in the floating net cage; or leading into floating net cage from the outside; setting density of transparent algae at 10-40 / L; picking Cladophora when Cladophora breed 1-2 weeks on the nylon twine net.

Description

technical field [0001] The invention relates to a water treatment method, in particular to a method for controlling algae and nitrogen and phosphorus nutrition levels in eutrophic raw water in a pre-sedimentation tank of a waterworks. Background technique [0002] The water body absorbs too many nutrients such as nitrogen and phosphorus, which causes the excessive reproduction of algae and other aquatic organisms, reduces the transparency of the water body, deteriorates the water quality, and eutrophic raw water greatly affects the normal production of the waterworks. 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 remove algae and other methods. Although chemical algae removal is flexible in application, it increases chemical substances that are harmful to health; microfiltration and air flotation algae removal are complicated and c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/00C02F3/32C02F3/10
CPCY02W10/10
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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