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Method for effectively controlling algal blooms by utilizing microbes

A technology of microorganisms and algae, applied in biological water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problem that the removal rate can only reach 79.1%, and achieve good dirt removal effect. Good economic benefits and strong adaptability

Inactive Publication Date: 2011-08-03
HENAN UNIVERSITY
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Most of the current methods of using microorganisms to control algae use one or two types of bacteria, and can only degrade one or several pollutants that cause eutrophication
In the Chinese Patent Bulletin, an invention of "method for purifying aquaculture water by using microorganisms" was disclosed. Its application number is 200310107114.8. Four kinds of microorganisms purify the aquaculture water, and the removal rate of total nitrogen (TN) can only reach 79.1%

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0015] Treatment of eutrophic landscape water bodies. Four kinds of microorganisms Bacillus, Acinetobacter, denitrifying bacteria and photosynthetic bacteria provided by Beijing Wotu Tiandi Biotechnology Co., Ltd. are used to mix them into a mixed bacterial solution according to their volume ratio of 1:1:2:1 ,spare. The test water was taken from the seriously polluted waters in the zoo. The water quality characteristics: COD87.6mg / L, TN 1.55mg / L, TP 0.15mg / L, Chla117.3mg / L. In the eutrophic landscape water body, the dosage is 0.05‰ of the volume of the water body. The method of continuously feeding the bacterial solution is adopted, and the bacterial solution is injected once every 7 days. After 30 days of continuous treatment with the mixed bacterial solution, the water quality of the landscape water body is measured as COD 20.2mg / L, TN0.25mg / L, TP 0.02mg / L, Chla 11.3mg / L, and adopt the standard method: "Water and Wastewater Analysis and Monitoring Methods", edited by the Na...

Embodiment 2

[0017] Treatment of eutrophic river water. Four kinds of microorganisms Bacillus, Acinetobacter, denitrifying bacteria and photosynthetic bacteria provided by Beijing Wotu Tiandi Biotechnology Co., Ltd. are used to mix them into a mixed bacterial solution according to their volume ratio of 1:1:5:3 ,spare. Take Xiaoqing River water as the test water body, the water quality characteristics are COD 238.7mg / L, TN 7.97mg / L, TP 0.97mg / L, Chla 236.7mg / L, put the above-mentioned spare mixed bacterial solution into the eutrophication In the river water, the dosage is 0.2‰ of the volume of the water body. The mixed bacterial solution is continuously injected, and the mixed bacterial solution is used for treatment every 7 days. After 30 days of continuous treatment with the mixed bacterial solution, the water quality of the water body is measured as COD 40.7 mg / L, TN 1.56mg / L, TP "" 0.08mg / L, Chla 30..3mg / L, and use the standard method: "Water and Wastewater Analysis and Monitoring Meth...

Embodiment 3

[0019] Treatment of eutrophic aquaculture water. Four kinds of microorganisms Bacillus, Acinetobacter, denitrifying bacteria and photosynthetic bacteria provided by Beijing Wotu Tiandi Biotechnology Co., Ltd. are used to mix them into a mixed bacterial solution according to their volume ratio of 1:1:3:1 ,spare. Take aquaculture water as the test water body, water quality characteristics: COD 95.6mg / L, TN 2.07mg / L, TP 0.63mg / L, Chla134.6mg / L, put the above-mentioned spare mixed bacterial solution into the eutrophic aquaculture In the water body, the dosage is 0.1‰ of the volume of the water body. The method of continuously adding the mixed bacterial solution is used, and the mixed bacterial solution is used for treatment every 7 days. After 30 days of continuous treatment with the mixed bacterial solution, the water quality of the water body is measured as COD 20.0mg / L, TN 0.35mg / L, TP0.05mg / L, Chla 13.3mg / L, and use the standard method: "Water and Wastewater Analysis and Mon...

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Abstract

The invention relates to a method for effectively controlling algal blooms by utilizing microbes, which comprises the steps: four different physiological groups of microbes which are bacillus, acinetobacter, denitrifying bacterium and photosynthetic bacterium are mixed to form a mixed bacteria culture according to the volume ratio of 1 to 3 : 1 to 4: 1.7 to 6: 1 to 5; and bacteria addition treatment is carried out for one time every seven days according to 0.05 to 0.2per mill of addition volume of the volume of a treated water body by a continuous bacteria addition method. The mixed bacteria culture can simultaneously purify and treat various pollutants in eutrophic water body, has strong adaptability, can quickly form dominant microflora in water body, lead all pollutant indexes of purified and treated eutrophic water body to be obviously reduced and have good removal effect and higher removal rate, wherein in eutrophic water body, the removal rate of TN reaches 83.1 to 84.4%, the removal rate of TP reaches 86.7 to 92.1%, the removal rate of COD reaches 76.9 to 82.9 %, and the removal rate of Chla reaches 87.2 to 90.4%. The purification method is simple to operate and has low operating cost, is safe and reliable, can maintain water quality of water body for long term and has good economic, ecological and social benefits.

Description

technical field [0001] The invention relates to a method for controlling algae blooms, in particular to a method for effectively controlling algae blooms by using microorganisms, which is suitable for purification treatment of eutrophic water bodies. Background technique [0002] At present, the phenomenon of eutrophication in my country's water bodies is common, and the direct consequences are deterioration of water quality, foul smell of water, excessive algae growth, decline of biodiversity, frequent occurrence of algae blooms, serious impact on water quality, and threats to human health. In recent years, although great progress has been made in blocking sources and intercepting pollution, from the analysis of eutrophication degree, the nutrient status index of each water body is still higher than before. It can be seen that the control of water eutrophication by controlling the input of exogenous nitrogen and phosphorus has not achieved ideal results in a short period of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34
Inventor 王琳李季郭廷忠童海滨秦明周
Owner HENAN UNIVERSITY
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