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Method for inactivating microorganisms in drinking water based on photoelectrochemical reactor

A technology of photoelectrochemistry and chemical reaction, applied in chemical instruments and methods, light water/sewage treatment, water/sewage treatment, etc., can solve problems such as transportation and storage process safety, reduce disinfection energy consumption, and increase sterilization rate Effect

Inactive Publication Date: 2019-10-18
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the additional addition of H 2 o 2 Facing many problems such as transportation and storage process safety

Method used

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  • Method for inactivating microorganisms in drinking water based on photoelectrochemical reactor

Examples

Experimental program
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Effect test

example 1

[0037] The structure of the photoelectrochemical reactor used in this embodiment is as follows figure 1 shown.

[0038] 1. Pretreatment of drinking water:

[0039] Inject drinking water to be treated into the photoelectrochemical reactor with an injection volume of 1000mL, accounting for 85% of the capacity of the photoelectrochemical reactor. Add 0.20g of sodium sulfate, turn on the magnetic stirring and aeration switch, and aerate the air for 20 minutes to improve the dissolution rate in the water. oxygen concentration.

[0040] 2. Disinfection treatment of drinking water

[0041] Connect the DC steady current power supply of the photoelectrochemical reactor, turn on the lamp tube of the solar simulator, and treat for 3 hours; water molecules are decomposed into hydroxyl radicals at the anode, and oxygen is reduced to hydrogen peroxide at the cathode. With the continuous increase of the concentration of hydrogen peroxide, the ultraviolet disinfection effect in synergy wit...

example 2

[0047] The photoelectrochemical reactor used in this embodiment is as shown in Example 1.

[0048] 1. Pretreatment of drinking water:

[0049] Inject drinking water to be treated into the photoelectrochemical reactor with an injection volume of 1000mL, accounting for 85% of the capacity of the photoelectrochemical reactor. Add 0.20g of sodium sulfate, turn on the magnetic stirring and aeration switch, and aerate the air for 20 minutes to improve the dissolution rate in the water. oxygen concentration.

[0050] 2. Disinfection treatment of drinking water

[0051] Switch on the DC steady-current power supply of the photoelectrochemical reactor, turn on the lamp tube of the solar simulator, and treat for 2.5 hours; water molecules are decomposed into hydroxyl radicals at the anode, and oxygen is reduced to hydrogen peroxide at the cathode. With the continuous increase of the concentration of hydrogen peroxide, the ultraviolet disinfection effect in synergy with sunlight is very...

example 3

[0057] The photoelectrochemical reactor used in this embodiment is as shown in Example 1.

[0058] 1. Pretreatment of drinking water:

[0059] Inject drinking water to be treated into the photoelectrochemical reactor with an injection volume of 1000mL, accounting for 85% of the capacity of the photoelectrochemical reactor. Add 0.20g of sodium sulfate, turn on the magnetic stirring and aeration switch, and aerate the air for 20 minutes to improve the dissolution rate in the water. oxygen concentration.

[0060] 2. Disinfection treatment of drinking water

[0061] Switch on the DC steady-current power supply of the photoelectrochemical reactor, turn on the lamp tube of the solar simulator, and treat for 2.5 hours; water molecules are decomposed into hydroxyl radicals at the anode, and oxygen is reduced to hydrogen peroxide at the cathode. With the continuous increase of the concentration of hydrogen peroxide, the ultraviolet disinfection effect in synergy with sunlight is very...

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Abstract

The invention relates to a method for inactivating microorganisms in drinking water based on a photoelectrochemical reactor. The method for inactivating the microorganisms in the drinking water basedon the photoelectrochemical reactor is characterized by comprising the steps that (1) the drinking water is pretreated, specifically, the drinking water to be treated is injected into the photoelectrochemical reactor, electrolyte sodium sulfate is added, a magnetic stirring and aeration switch is turned on, air aeration is carried out for 20 minutes, and the dissolved oxygen concentration in wateris improved; and (2) drinking water disinfection treatment is carried out, specifically, a direct current stabilized current supply of the photoelectrochemical reactor is connected, a modulator tubeof a solar simulator is opened, and treatment is carried out for 2-3 hours; and escherichia coli is inactivated thoroughly and the drinking water standard is reached. By adopting the method for inactivating the microorganisms in the drinking water based on the photoelectrochemical reactor, dissolved oxygen is reduced as hydrogen peroxide through a modified cathode after the power supply is electrified, the hydrogen peroxide inactivates the microorganisms, and the drinking water standard is reached. The hydrogen peroxide generated by electrochemical reduction is combined with solar energy disinfection, the inactivation efficiency of the microorganisms is improved, and the drinking water treatment cost is reduced.

Description

technical field [0001] This patent relates to the technical field of drinking water treatment, in particular to a method for inactivating microorganisms in drinking water based on a photoelectrochemical reactor. Background technique [0002] Since the 21st century, with the rapid development of productivity and science and technology, human living standards have also been greatly improved. However, environmental problems still plague countries and regions in the world, and human health is facing a severe test. Among them, the water environment problem is very prominent. Scientists have found that the etiology of most human diseases is related to drinking water, and various waterborne pathogens are the culprit. In view of the serious diseases caused by waterborne pathogenic microorganisms to humans, the disinfection process is very important for the treatment of drinking water. Traditional water disinfection methods, such as chlorination, ozonation, etc., often require a l...

Claims

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Application Information

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IPC IPC(8): C02F9/08
CPCC02F1/4672C02F1/32C02F1/30C02F2303/04
Inventor 金延超施毅君郑曦陈日耀陈晓陈孖瑜
Owner FUJIAN NORMAL UNIV
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