Method for adopting ozonized air to remove pollution algae in water body

A technology of ozonation and air, applied in the field of ozonated air to remove polluted algae in water bodies, can solve the problems of high cost, secondary pollution of water body environment, etc., and achieve the effect of ensuring uniformity, safe and efficient way, and cost reduction

Inactive Publication Date: 2010-05-19
FUDAN UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0005] Aiming at the disadvantages of using single ozone or ozonated pure oxygen to kill algae in the prior art, the cost is relatively high, and it is easy to cause secondary pollution to the water environment. The purpose of the present invention is to propose a low-cost, non-secondary pollution Method for removing polluting algae in water bodies

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  • Method for adopting ozonized air to remove pollution algae in water body
  • Method for adopting ozonized air to remove pollution algae in water body

Examples

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Embodiment 1

[0019] Taking the treatment of eutrophic algae-containing sewage as an example, the process flow is as follows figure 1 shown. The volume of treated algae-containing sewage is 4.0L, and the volume ratio of ozone to air is 4*10 -4 : 1, the initial chlorophyll a concentration is 1800ug / L, the photosynthetic activity of algae is 0.45, and the time for ozonated air to remove algae is 7h. The effluent results after operation: the concentration of chlorophyll a is 40.4ug / L, the photosynthetic activity of algae is 0.02, the removal rate of algae (chlorophyll a) in sewage is 97.75%, and the photosynthetic activity is reduced by 95.55%.

Embodiment 2

[0021] Taking the treatment of eutrophic algae-containing sewage as an example, the process flow is as follows figure 1 shown. The volume of treated algae-containing sewage is 4.0L, and the volume ratio of ozone to air is 4*10 -4 : 1, the initial chlorophyll a concentration is 1700ug / L, the photosynthetic activity of algae is 0.40, and the time for ozonated air to remove algae is 5h. The effluent results after operation: the concentration of chlorophyll a is 32.8ug / L, the photosynthetic activity of algae is 0.02, the removal rate of algae (chlorophyll a) in sewage is 98.0%, and the photosynthetic activity is reduced by 95.0%.

Embodiment 3

[0023] Taking the treatment of eutrophic algae-containing sewage as an example, the process flow is as follows figure 1 shown. The volume of treated algae-containing sewage is 4.0L, and the volume ratio of ozone to air is 5*10 -4 : 1, the initial chlorophyll a concentration is 1800ug / L, the photosynthetic activity of algae is 0.45, and the time for ozonated air to remove algae is 7h. The effluent results after operation: the concentration of chlorophyll a is 33.6ug / L, the photosynthetic activity of algae is 0.015, the removal rate of algae (chlorophyll a) in sewage is 98.1%, and the photosynthetic activity is reduced by 96.67%.

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Abstract

The invention belongs to the technical field of environmental protection, and more particularly relates to a method for adopting ozonized air to remove pollution algae in water body. The method uses an ozone generator to generate the ozonized air and fills the ozonized air into an algal removal SBR reactor for algal removal treatment. The ozonized air is ozone mixed with air, and the concentration of the ozonized air is controlled by flow rate, so that the ozone concentration is reduced in the process of removing algae by the ozone, and the algal removal cost is greatly reduced. The bottom of the algal removal SBR reactor is set to be a ring shape and provided with a multi-point aerator pipe, so that the uniformity of aeration of the ozonized air can be ensured. The operation is carried out under the reasonable technological parameters, and the pollution algae (chlorophyll a) in the water body is removed by the ozonized air through the algal removal SBR reactor, so that the removal rate of the pollution algae and the reduction of algae photosynthetic activity can reach more than 90%.

Description

technical field [0001] The invention belongs to the technical field of biological treatment of water, waste water or sewage, and in particular relates to a method for removing polluted algae in a water body by using ozonated air. Background technique [0002] The problem of water eutrophication caused by excessive discharge of nutrients such as nitrogen and phosphorus has become increasingly prominent, and the water body lacks external renewal and self-purification capabilities. Studies have found that the growth of 1g of algae requires 0.009g of phosphorus and 0.063g of nitrogen. When TN>0.3mg / L and TP>0.015mg / L in water, the algae will reproduce viciously, resulting in a decrease in dissolved oxygen in the water, a decrease in water transparency, and serious water quality. Deterioration (Water and Sewerage, 2002, 28(12): 56-58). Algal blooms have become a global problem that seriously affects the quality of the water environment and the ecological security of water ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/78
Inventor 王祥荣姚晨超张页董小耘姚蔡轩沈哲林琳黄元龙
Owner FUDAN UNIV
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