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Method and device for purifying fish farming sewage by electrocoagulation-gas flotation process

A sewage device and air flotation technology, which is applied in chemical instruments and methods, flotation water/sewage treatment, water/sewage treatment, etc., can solve the problems of high energy consumption, high cost, and high cost, and achieve energy consumption Low cost, reduced processing cost, and easy management

Inactive Publication Date: 2015-02-11
FISHERY MACHINERY & INSTR RES INST CHINESE ACADEMY OF FISHERY SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high current density used, the operation energy consumption is high, the cost is expensive, and the corresponding cost is increased. So far, it has not been applied to the treatment of fish farming sewage.

Method used

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  • Method and device for purifying fish farming sewage by electrocoagulation-gas flotation process
  • Method and device for purifying fish farming sewage by electrocoagulation-gas flotation process
  • Method and device for purifying fish farming sewage by electrocoagulation-gas flotation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] An electrocoagulation air flotation method for purifying fish farming sewage is characterized in that an insulating positioning bar 6 is arranged at the bottom of the tank body 1, and grooves are arranged on the positioning bar; several pole plates 2 are suspended and positioned on the tank wall by the upper cantilever, The lower part of the pole plate 2 is separated by the groove of the positioning bar;

[0048] The unipolar parallel connection method is adopted between the plates: the first plate is the positive pole, the second plate is the negative pole, and they are arranged in sequence; the positive poles of all the unipolar plates are connected in parallel through the upper wire, and connected to the DC stabilized voltage through the variable resistor 3 The positive pole of the power supply 4; the negative poles of all the unipolar plates are connected in parallel through the upper wires, and the negative poles of the DC stabilized power supply 4 are connected throu...

Embodiment 2

[0054] The distance between the pole plates 2 is 8mm. Other structures are with embodiment 1.

[0055] 1) Mix pH7.6, COD85mg / L, SS80mg / L, total number of bacteria 3.5×10 4 The cfu / mL fish farming sewage is introduced into the tank of the electrocoagulation device.

[0056] 2) Adjust the variable resistor 3, the current density of the control device is 0.15 A / dm 2 , start the power switch of the electrocoagulation device, and control its electrolysis time for 30 minutes.

[0057] 3) Remove the suspended matter in the upper layer, and let it settle for 15 minutes to obtain the supernatant, which is the purified solution.

[0058] The COD removal rate of the purified fish farming sewage reached 62.6%, and the SS removal rate reached 64.4%, achieving a good water purification effect.

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Abstract

A device for purifying fish farming sewage by an electrocoagulation-gas flotation process is provided. The bottom of a tank body 1 is provided with an insulation positioning bar 6. The positioning bar is provided with grooves. A plurality of polar plates 2 are suspended and positioned on the tank wall through upper suspending arms. The lower parts of the polar plates 2 are separated by the grooves in the positioning bar. The polar plates adopt a monopolar type parallel connection method, wherein the first polar plate is a positive electrode, the second polar plate is a negative electrode, and the rest of the polar plates are arranged successively. The positive electrodes of all the monopole plates are in parallel connection through upper wires and are connected to the cathode of a direct-current stabilized power supply 4 through a variable resistance 3. The negative electrodes of all the monopole plates are in parallel connection through upper wires and are connected to the anode of the direct-current stabilized power supply 4 through an ampere meter 5. The polar plates are aluminum plates. According to the method and the device for purifying the fish farming sewage by the electrocoagulation-gas flotation process, and by unique performance of the method and the device, COD reduction, SS removal, sterilization and disinfection are achieved, good water purification effects are achieved, and a treatment cost is effective reduced.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a method and a device for purifying fish farming sewage by electrocoagulation air flotation. Background technique [0002] Fish farming sewage contains a large amount of suspended organic matter, high content of nitrogen and phosphorus substances, and the direct discharge of untreated fish farming sewage will cause great pollution and damage to the environmental waters. A water purification method to treat it to recycle it or discharge it up to the standard came into being, but the high treatment cost has become a bottleneck restricting its application and development. With the development of electrochemical science, electrocoagulation air flotation has attracted great attention as a competitive sewage treatment technology. Its characteristic is that under the action of an external electric field, the soluble anode is used to produce the coagulant for destab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C02F1/463C02F1/465
CPCC02F1/463C02F1/46104C02F1/46109C02F1/465C02F1/467C02F1/4672C02F1/4676C02F2103/20C02F2201/46105
Inventor 杨菁管崇武吴凡
Owner FISHERY MACHINERY & INSTR RES INST CHINESE ACADEMY OF FISHERY SCI