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Air-assisted electro-coagulation algae water separation device and using method thereof

A technology for algal water separation and electroflocculation, which is applied in chemical instruments and methods, biochemical equipment and methods, biological material sampling methods, etc. Surface area, the effect of improving the efficiency of electroflocculation

Inactive Publication Date: 2013-11-06
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a gas-assisted electric flocculation algae water separation device and its use method to overcome the defect that the current microalgae electric flocculation equipment is difficult to realize industrial continuous operation

Method used

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  • Air-assisted electro-coagulation algae water separation device and using method thereof
  • Air-assisted electro-coagulation algae water separation device and using method thereof
  • Air-assisted electro-coagulation algae water separation device and using method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1 Separation of algal hydroelectric flocculation and air flotation collection of cyanobacteria in Dianchi Lake, Kunming

[0039] The device of the present invention is used to investigate the separation effect of algae hydroelectric flocculation in the water body of cyanobacteria in Dianchi Lake, Kunming. Control the flow rate ratio of the feed liquid inlet 16 and the feed liquid outlet 12 to be 1:0.95, the applied voltage of the DC power supply 17 is 24 volts, the current is 1.5 amperes, the air supply time of the pulse blowing device 11 is 1 minute, the interval is 30 seconds, and the air pressure is 4.0 MPa , during the continuous separation and collection process, the microalgae biomass was measured on the clear liquid at the feed liquid outlet 12, and the microalgae yield was 98.5%.

Embodiment 2

[0040] Example 2 Separation of algal hydroelectric flocculation and air flotation collection of cyanobacteria in Taihu Lake, Wuxi

[0041] The device of the invention is used to investigate the separation effect of algae hydroelectric flocculation in Wuxi Taihu cyanobacteria water body. Control the flow rate ratio of the feed liquid inlet 16 and the feed liquid outlet 12 to be 1:0.85, the applied voltage of the DC power supply 17 is 24 volts, the current is 1.5 amperes, the air supply time of the pulse blowing device 11 is 5 minutes, the interval is 1 minute, and the air pressure is 2.0 MPa , during the continuous separation and collection process, the microalgae biomass was measured on the clear liquid at the feed liquid outlet 12, and the microalgae yield was 99.0%.

Embodiment 3

[0042] Example 3 Separation of algal hydroelectric flocculation and air flotation collection of microalgae in spirulina culture solution

[0043] The device of the invention is used to investigate the effect of hydroelectric flocculation separation of microalgae in spirulina culture solution. Control the flow rate ratio of the culture solution inlet 16 and the clear liquid outlet 12 to be 1:0.9, the applied voltage of the DC power supply 17 is 6 volts, the current is 1.0 ampere, and the gas supply time of the pulse blowing device 11 is 2 minutes with an interval of 45 seconds , air pressure 1.0MPa, during the continuous separation and collection process, the microalgae biomass was measured on the clear liquid at the feed liquid outlet 12, and the yield of spirulina was 97.5%.

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Abstract

The invention discloses an air-assisted electro-coagulation algae water separation device and a using method thereof, and belongs to the technical field of sewage treatment. The device comprises a tower, a main shaft, concentric cylinder electrode plates, a mechanical transmission device, a connecting rod mechanism, a floating ball device, an air distributor, a pulse air feeding device and the like. The device takes even pairs of concentric cylinders as cathode and anode for electro-coagulation which are distributed in a staggering way; the surface area of the electrode plate is large, the electro-coagulation efficiency is high, and the adsorption precipitation of microalgae on the surface of the electrode can be effectively prevented. The flowing direction of the liquid in the tower is opposite to the settlement direction of the microalgae so as to form cross flow to enhance the mass transfer and improve the electro-coagulation efficiency. The floating ball device can keep the moving components such as the main shaft in the tower, the concentric cylindrical electrode plates of the cathode and anode and the like in a floating state so as to reduce the running load of a transmission motor. The device of the invention can realize continuous operation of electro-coagulation and air floatation collection of the microalgae; and the basic structure is easy to amplify and implement so as to meet the requirements of large-scale industrial continuous running.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a gas-assisted electric flocculation algae water separation device and a use method thereof, which are used for the separation and purification of algae water rich in microalgae water bodies. Background technique [0002] Water resources are one of the key resources for human survival. With the acceleration of urbanization and industrial development, human beings are putting more and more pressure on the ecological environment of precious water resources. A large amount of industrial wastewater and domestic sewage are discharged into rivers, lakes and reservoirs, resulting in the continuous increase of ammonia, nitrogen and phosphorus nutrients in the water, the eutrophication of the lake water is becoming more and more serious, and the ecosystem is degraded. According to the latest statistics, 88.6% of the 133 large lakes in my country have water eutrophica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/463C02F1/24
CPCC12M21/02C12M47/02C12M33/00
Inventor 黄昆刘会洲安震涛
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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