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Method for controlling algae in water

A control method and algae technology, applied in the field of environmental water treatment, can solve the problems of inability to prevent the growth and reproduction of algae, high cost, low efficiency of algae removal technology, etc., and achieve stable removal and thorough control, strong vitality, and thorough algae control. Effect

Inactive Publication Date: 2019-03-29
ZHEJIANG GONGSHANG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a safe, economical, efficient and stable method for the current algae removal technology, which has low efficiency, high cost, secondary pollution risk, and inability to prevent algae growth and reproduction. A method of controlling algae in water to achieve effective removal and thorough control of algae cells

Method used

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  • Method for controlling algae in water

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Embodiment 1

[0029] With reference to the accompanying drawings, this embodiment is a biological / chemical combined water algae control method, and the object of treatment is algae in landscape lakes. Taking a certain eutrophic river channel as the treatment object, the algae in it are removed by the method of the present invention. Lake water quality characteristics: pH 7.3, water temperature 25°C, algae content 2×10 7 pcs / liter.

[0030] In this embodiment, the algae in the water are treated with the first treatment method, the second treatment method, and the third treatment method in sequence. Among them, the first treatment method is black-shell shrimp, black-shell shrimp (Zhejiang rice shrimp, Caridina Zhejiangensis ) dosage is 100 / L, and the concentration of dissolved oxygen in water is controlled to 8 mg / L by aeration. During the treatment process, dark treatment and artificial light source are alternately controlled (irradiation with 10w fluorescent lamp for 1 hour every 24 ho...

Embodiment 2

[0039] With reference to the drawings, this embodiment is a biological / chemical combined water algae control method, and the object of treatment is algae in surface water. The method of the invention is applicable to the removal and control of algae in various surface waters. Taking a certain eutrophic river channel as the treatment object, the algae in it are removed by the method of the present invention. River water quality characteristics: pH 7.2, water temperature 26°C, algae content 7×10 7 piece / liter.

[0040] The method used in this embodiment is: the water to be treated is sequentially passed through the first treatment method, the second treatment method, and the third treatment method. Among them, the first treatment method is black-shell shrimp, black-shell shrimp (Zhejiang rice shrimp, Caridina Zhejiangensis ) dosage is 300 / L, and the concentration of dissolved oxygen in water is controlled by aeration to 10 mg / L. During the treatment process, dark treatment...

Embodiment 3

[0043] A biological / chemical combined water algae control method in this embodiment is basically the same as in Embodiment 2, except that: the object of treatment in this embodiment is lake water; the water quality of the lake is pH 7.4, the water temperature is 22°C, and the algae content is 1 ×10 8 pcs / L; the first treatment method is black-shell shrimp, black-shell shrimp (Chinese sawtooth rice shrimp, Neocaridina denticulate sinensis ) dosage is 500 / L, the concentration of dissolved oxygen in the water is controlled by aeration to 12 mg / L, and the hydraulic retention time is 36 hours; the second treatment method is sodium sulfite reduction treatment, and the dosage is 160 mg / L. The time is 15 minutes; the third treatment method is ultraviolet light irradiation treatment, and the ultraviolet dose is 50 J / cm 2 , The hydraulic retention time is 60 minutes.

[0044] The algae control effect of present embodiment is as follows figure 2 shown. The method adopted in this em...

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Abstract

The invention discloses a method for controlling algae in water, which comprises the following steps: (1) adding a reducing agent to the water to-be-treated, wherein the reducing agent is selected from one of sulfite, pyrosulfite, thiosulfate and sulfide, and controlling the dissolved oxygen in water to be less than 2 mg / L, wherein the treatment time is 0.5 to 20 minutes; and (2) placing the watertreated in step (1) in a closed reactor, controlling the dissolved oxygen in the water to be less than 0.5 mg / L, and performing ultraviolet irradiation treatment; or treating the water to-be-treatedby neocaridina denticulata biological treatment, and performing further processing by the steps (1) and (2). The control method of the invention can achieve effective removal and thorough control of algae cells safely, economically, efficiently and stably.

Description

technical field [0001] The invention relates to the technical field of environmental water treatment, in particular to a method for controlling algae in water. Background technique [0002] Human activities such as production and living discharge a large amount of nutrients into nature, resulting in eutrophic pollution in many water environments. Eutrophication exists in most lakes and reservoirs in my country, and blue-green algae and algae blooms occur from time to time. Eutrophication of water bodies is a serious hazard, directly destroying the health of the ecological environment, affecting the balance of the ecosystem, threatening the effective use of water resources, causing huge losses to public drinking water, industrial and agricultural water supply, aquaculture, tourism, and water transportation, and posing a threat to human public health. It is one of the biggest environmental problems facing the water environment. Therefore, how to effectively improve water eut...

Claims

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Application Information

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IPC IPC(8): C02F1/70C02F1/50C02F1/32C02F9/14
CPCC02F1/32C02F1/50C02F1/70C02F3/32
Inventor 李旭春张心瑜张小魏吕欣吴永亨
Owner ZHEJIANG GONGSHANG UNIVERSITY
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