Process for inhibiting algoe in regenerating water using chuanman algoe

A technology of applying algae and reclaimed water, applied in chemical instruments and methods, biological water/sewage treatment, energy and wastewater treatment, etc., can solve the damage of landscape water ecosystem, can not achieve the effect of nutrient salt removal, and is not suitable for salty water. problems such as high volume of water, to achieve the effect of easy access, easy control and low cost

Inactive Publication Date: 2006-06-28
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The conventional secondary treatment of wastewater followed by phosphorus and nitrogen removal can reduce the nutrient salt in the reclaimed water, thereby inhibiting the growth of algae, but the cost of the treatment process is high and cannot be popularized.
[0004] Although the use of chemical algicides such as copper sulfate can inhibit the growth of algae, copper ions cannot be degraded in water bodies and will be transmitted in the ecosystem through the food chain, endangering aquatic animals and human health, and chemical reagents are effective in killing algae. At the same time, other higher plants in the aquatic ecosystem will be killed, the landscape water ecosystem will be destroyed, and the ecological function will disappear.
[0005] Ecological technologies such as artificial wetlands, artificial plant floating beds, artificial subsidence technologies, and construction of three-dimensional aquatic vegetation systems in shallow small water bodies are economical and efficient, but most of the aquatic plant materials currently selected are suitable for freshwater growth. It is not suitable for water bodies with high salinity, so the removal effect of nutrients in saline water cannot be achieved

Method used

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  • Process for inhibiting algoe in regenerating water using chuanman algoe
  • Process for inhibiting algoe in regenerating water using chuanman algoe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) get 15 grams of chrysanthemum algae, and transplant it into 3 liters of reclaimed water that needs to be treated with a salinity of 3.5 ‰;

[0038] (2) Give 5000lux light intensity day and night, and cultivate for 7 days at a temperature of 30°C;

[0039] (3) After 7 days, the nutrient salt in the water body drops to the ammonia nitrogen concentration of 0.5mg / L, and the total phosphorus concentration is below 0.2mg / l, and the algae can be removed to inhibit the growth of algae in the water body to be treated. The removed C. algae can be used for green manure or for extracting gram algae matter.

[0040] After testing, the removal rate of phosphate in water is 94.6%, and the removal rate of ammonia nitrogen is 96.5%. Chlorophyll a decreased by 79.2%,

Embodiment 2

[0042] (1) get 21 gram of chrysanthemum algae, and transplant to 3 liters of reclaimed water that needs to be treated with a salinity of 0.1‰;

[0043] (2) 3000lux light intensity was given day and night, and the temperature was 25°C, and cultivated for 10 days;

[0044] (3) After 10 days, the algae were removed. When the nutrient salt in the water body is reduced to the ammonia nitrogen concentration of 0.1mg / L and the total phosphorus concentration below 0.2mg / L, it can remove the algae and achieve the purpose of inhibiting the growth of algae in the water body to be treated.

[0045] After testing, the removal rate of phosphate in water is 96.5%, and the removal rate of ammonia nitrogen is 97.5%. Chlorophyll a decreased by 85.2%.

Embodiment 3

[0047] (1) Get 20 grams of Chuanmania, fix it with a mesh, and hang it in 2 liters of mixed solution with a salinity of 5‰, where the mixed solution is distilled water and seawater filtered through a 0.2 μ fiber membrane;

[0048] (2) Give light day and night, the sunlight can be used in the daytime, artificial light source is used at night, and the temperature of light is 25°C and cultivated for 5 days;

[0049] (3) remove the Chuanmania, and then concentrate the cultivation water to 10 milliliters by low-pressure rotary evaporation;

[0050] (4) Take 10 milliliters of the above-mentioned concentrated solution, and apply it to 1 liter of Microcystis aeruginosa pure culture solution in the water to be treated.

[0051] After testing for 96 hours, the inhibition rate to Microcystis aeruginosa is 92%.

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Abstract

A method for suppressing the reproduction of algae in reclaimed water by use of ruppia includes such steps as transplanting ruppia into the reclaimed water to be treated, culturing by light radiation for 7-10 days, transplating it in the mixture of distilled water and seawater or the distilled water, culturing by light radiation for 5-7 days, concentrating the culturing water by low-pressure rotary evaporation, and applying it to the reclaimed water, or extracting the liquid extract from ruppia and applying it to the reclaimed water.

Description

technical field [0001] The invention relates to the field of regenerated water treatment, in particular to a method for inhibiting algae in regenerated water by using algae. Background technique [0002] Reuse of urban reclaimed water for landscape water is an important aspect of sewage resource utilization. In recent years, the practice of this aspect has developed rapidly in my country's coastal water-scarce cities. However, when reclaimed water is reused in urban landscape water bodies, there are potential dangers, that is, reclaimed water often contains high nutrient salts, which can easily cause eutrophication of landscape water bodies, vicious growth of algae, and loss of landscape functions of water bodies. Therefore, inhibiting the growth of algae in reclaimed water is key. [0003] The conventional secondary treatment of wastewater followed by phosphorus and nitrogen removal can reduce the nutrient salt in the regenerated water, thereby inhibiting the growth of al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32
CPCY02W10/37
Inventor 王卫红季民
Owner TIANJIN UNIV
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