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Method for treating eutrophicated water body by using microalgae

A technology of eutrophication and microalgae, applied in microorganism-based methods, chemical instruments and methods, biochemical equipment and methods, etc., can solve the problems of large investment in processing technology, complex process and high cost

Inactive Publication Date: 2011-03-16
北京芳能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the problems of large investment, high cost, complex process, and easy secondary pollution of existing treatment technologies, the present invention provides a method for removing pollutants such as nitrogen and phosphorus in eutrophic water bodies by using microalgae

Method used

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  • Method for treating eutrophicated water body by using microalgae
  • Method for treating eutrophicated water body by using microalgae

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Sodium bicarbonate 6.8-26.8g / L Sodium chloride 0.01-0.2g / L

[0068] Magnesium sulfate 0.05-0.3g / L Potassium sulfate 0.5-2.0g / L

[0069] Dipotassium hydrogen phosphate 0.1-2.0g / L Calcium chloride 0.01-0.09g / L

[0070] Sodium nitrate 0.5-4.5g / L Gibberellin 0.05-0.4mg / L

[0071] Trace elements 0.5-2ml / L

[0072] Wherein the trace element preparation method is:

[0073] Boric acid 1-5mg Ferric chloride 150-800mg

[0074] Zinc sulfate 0.04-0.3mg Sodium molybdate 5-40mg

[0075] Manganese sulfate 0.35-2.5mg Cobalt chloride 3.5-10mg

[0076] Copper sulfate 0.02-0.09mg Add distilled water to 1L

[0077] The culture conditions are: temperature 28-32°C, light 4000-25000 lux, pH: 6.5-8, growth cycle 5-8 days.

[0078] A better medium formula is:

[0079] Sodium bicarbonate 10.8-20.8g / L Sodium chloride 0.01-0.2g / L

[0080] Magnesium sulfate 0.12-0.25g / L Potassium sulfate 0.5-1.6g / L

[0081] Dipotassium hydrogen phosphate 0.3-1.2g / L Calcium chloride 0.03-0.06g / L

[0082] ...

Embodiment 2

[0113] Sodium nitrate 0.1-2g / L Dipotassium hydrogen phosphate trihydrate 0.01-0.08g / L

[0114] Magnesium sulfate heptahydrate 0.01-0.15g / L Calcium chloride dihydrate 0.01-0.1g / L

[0115] Ferric citrate 0.001-0.012g / L Sodium bicarbonate 0.01-0.05g / L

[0116] Disodium EDTA 0.0005-0.002g / L Tridecyl Alcohol 0.1-1.0mg / L

[0117] Trace elements 0.5-2ml

[0118] Among them, the trace element configuration method:

[0119] Boric acid 1.43-5.72g / L Manganese chloride monohydrate 0.9-3.6g / L

[0120] Copper sulfate pentahydrate 0.04-0.16g / L Zinc sulfate heptahydrate 0.11-0.45g / L

[0121] Sodium molybdate dihydrate 0.2-0.8g / L Cobalt nitrate hexahydrate 0.025-0.09g / L

[0122] Add water to make up to 1L.

[0123] The culture conditions are: temperature 28-33°C, light 4000-25000 lux, pH: 6.5-8.5, growth cycle 5-8 days.

[0124] A better medium formula is:

[0125] Sodium nitrate 0.3-0.9g / L Dipotassium hydrogen phosphate trihydrate 0.02-0.06g / L

[0126] Magnesium sulfate heptahydrate ...

Embodiment 3

[0159] Potassium nitrate 0.2-0.5g / L Sodium dihydrogen phosphate dihydrate 0.005-0.25g / L

[0160] Calcium chloride 0.01-0.05g / L Potassium chloride 0.05-0.3g / L

[0161] Magnesium Sulfate 0.02-0.15g / L Auxin 0.1-0.9mg / L

[0162] Cytokinin 0.05-0.2mg / L Iron EDTA 0.01g / L

[0163] Sodium acetate 0.05-0.3g / L Trace elements 0.5-2.0ml / L

[0164] Among them, the trace element configuration method:

[0165] Manganese chloride tetrahydrate 0.1-0.4g / L Cobalt chloride hexahydrate 0.05-0.2g / L

[0166] Copper sulfate pentahydrate 0.01-0.04g / L Zinc sulfate heptahydrate 0.02-0.08g / L

[0167] Sodium molybdate dihydrate 0.005-0.025g / L

[0168] Add water to make up to 1L.

[0169] The culture conditions are: temperature 28-33°C, light 4000-25000 lux, pH: 6.5-9, growth cycle 5-8 days.

[0170] A better medium formula is:

[0171] Potassium nitrate 0.25-0.4g / L Sodium dihydrogen phosphate dihydrate 0.008-0.15g / L

[0172] Calcium chloride 0.02-0.03g / L Potassium chloride 0.05-0.2g / L

[0173] M...

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Abstract

The invention discloses a method for treating eutrophicated water body by using microalgae, which comprises the following steps of: selecting microalgae capable of efficiently absorbing nitrogen and phosphorus as algae seeds, and performing domestication such as reducing the nitrogen and phosphorus content and adapting to the water body to be treated by regulating culture medium ingredients; and performing amplification culture step by step, introducing the algae seeds into a primary eutrophicated water body treatment tank, making the nitrogen and phosphorus flowing into the water body of theprimary treatment tank greatly absorbed by the microalgae, discharging into a secondary treatment tank for sedimentation and filtration, discharging most of the treated water, flowing back a little water to the primary treatment tank along with the microalgae, and recycling to fulfill the aim of improving the water quality finally. In the method, the defects of high technical investment, high cost, complex technology, secondary pollution and the like in the prior art are overcome. The COD of the eutrophicated water body treated by the method can be reduced by about 95 percent, the BOD can be reduced by about 93 percent, the total nitrogen can be reduced by about 97 percent, the total phosphorus can be reduced by about 97 percent, and the eutrophicated water body treated by the method completely meets the national type III water quality standard.

Description

technical field [0001] The invention provides a method for improving eutrophic water body by using microalgae to absorb nitrogen, phosphorus and other elements in water body. Background technique [0002] At present, the increasingly serious shortage of water resources and water environment pollution have plagued the development of my country's economy and society, and have become the main factors restricting the sustainable development of society and economy. The amount of water in our country is generally not much, and there is a serious uneven distribution. my country's per capita water resources are 2700m 3 , which is only 1 / 4 of the world average. Since more than 80% of eutrophic water bodies are directly discharged into the water environment without treatment, more than 90% of urban waters have been seriously polluted, nearly 50% of key urban water sources do not meet drinking water standards, and even urban groundwater has 50% % are heavily polluted. The pollution...

Claims

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Application Information

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IPC IPC(8): C12N1/12C02F3/34C12R1/89
Inventor 单东杰孙树刚
Owner 北京芳能科技有限公司
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