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Sewage aeration sterilization method

A sewage aeration and sewage technology, applied in the direction of sterilization/microdynamic water/sewage treatment, etc., can solve the problems of poor disinfection effect, inability to use, high energy consumption, etc., to achieve improved antibacterial and bactericidal effects, low manufacturing cost, and easy operation simple effect

Inactive Publication Date: 2018-05-04
安徽仁维环保工程科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Various methods have their own advantages and disadvantages: chlorine gas has a good sterilization effect and a long duration, but it will produce a large number of halogenated oxidation by-products; chlorine ammonia sterilization has a long duration and produces fewer by-products, but the sterilization effect is poor; chlorine dioxide The bactericidal effect is better and the organic by-products are less, but it will generate inorganic chlorite that is harmful to the human body. In addition, the chemical properties of chlorine dioxide are unstable, and it must be prepared and added on site, which is costly and inconvenient to use; Ozone has a good instantaneous sterilization effect and produces few halogenated by-products, but by-products such as formaldehyde and bromate will be generated, and ozone must be prepared on-site, which is inconvenient to use; potassium permanganate will not produce harmful by-products , but the disinfection effect is poor, and it cannot be used as a secondary disinfectant; the amount of bleaching powder used is large, and it is usually only used in small water plants in towns and villages or where there are no perfect water purification facilities in rural areas; ultraviolet treatment has a good sterilization effect and does not produce oxidative by-products products, but the duration of the bactericidal effect is short and cannot maintain the continuous bactericidal effect. The ultraviolet rays are obtained by on-site high-voltage discharge, which consumes a lot of energy and requires a large one-time investment. In addition, the penetration of ultraviolet rays is limited by factors such as turbidity in water, and usually cannot be used in sewage treatment. used in

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The invention provides a sewage aeration sterilization method, comprising the following steps:

[0020] S1. Set the bacterial content to 2.13×10 6 Each / mL of sewage is discharged into the blast aeration tank in a closed space, which is filled with sterilizing gas, and the air pressure in the closed space is 122kPa;

[0021] S2. 3.5 aerators are evenly distributed per square meter at the bottom of the blast aeration tank, and sterilizing gas is sprayed from the aerators. The ventilation volume of a single aerator is 0.052m 3 / min for 3.7 hours.

[0022] Wherein, the raw materials of the sterilizing gas include by weight: 56 parts of nitrogen, 11.3 parts of oxygen, 14.2 parts of carbon dioxide, and 4.8 parts of carbon monoxide.

Embodiment 2

[0024] The invention provides a sewage aeration sterilization method, comprising the following steps:

[0025] S1. Set the bacterial content to 3.25×10 5 Each / mL of sewage is discharged into the blast aeration tank in a closed space, which is filled with sterilizing gas, and the air pressure in the closed space is 128kPa;

[0026] S2. 3.1 aerators are evenly distributed per square meter at the bottom of the blast aeration tank, and sterilizing gas is sprayed from the aerators. The ventilation volume of a single aerator is 0.057m 3 / min for 3.4 hours.

[0027] Wherein, the raw materials of the sterilizing gas include by weight: 54 parts of nitrogen, 10.4 parts of oxygen, 14.7 parts of carbon dioxide, and 5.1 parts of carbon monoxide.

Embodiment 3

[0029] The invention provides a sewage aeration sterilization method, comprising the following steps:

[0030] S1. Set the bacterial content to 8.76×10 4 Each / mL of sewage is discharged into the blast aeration tank in a closed space, which is filled with sterilizing gas, and the air pressure in the closed space is 124kPa;

[0031] S2. 3.7 aerators are evenly distributed per square meter at the bottom of the blast aeration tank, and sterilizing gas is sprayed from the aerators. The ventilation volume of a single aerator is 0.042m 3 / min for 3.1 hours.

[0032] Wherein, the raw materials of the sterilization gas include by weight: 55 parts of nitrogen, 11.7 parts of oxygen, 13.8 parts of carbon dioxide, and 5.4 parts of carbon monoxide.

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PUM

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Abstract

The invention discloses a sewage aeration sterilization method. The method comprises the following steps: introducing sewage into an air-blowing aeration tank in an enclosed space filled with bacterium killing gas; and blowing out bacterium killing gas for 3 to 4 hours from an aerator arranged in the bottom of the air-blowing aeration tank. The method has the advantages that bacterium killing gasis continuously introduced into sewage, the growth environment of bacteria is changed, the metabolism of bacteria is disturbed, the goal of killing bacteria is realized, moreover, the method does notgenerate any harmful byproduct, and the bacterium killing gas can be repeatedly used.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a sewage aeration and sterilization method. Background technique [0002] Sterilization is an essential unit operation process in the water treatment process and an important barrier to ensure the biological safety of treated water. Sterilization is usually required in drinking water treatment to ensure that pathogenic bacteria and other bacteria in the water are completely inactivated and inhibit their growth in the water distribution pipe network to effectively ensure the biological safety of drinking water. The treated water in urban sewage plants is reused or discharged to Bacteria must also be killed before receiving water bodies to avoid endangering people's health and destroying the ecological environment. [0003] At present, chlorine gas, chlorine ammonia, chlorine dioxide, ozone, potassium permanganate, bleaching powder and ultraviolet rays are usually used in the oxida...

Claims

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Application Information

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IPC IPC(8): C02F1/50
CPCC02F1/50
Inventor 周燕王建泉周洁
Owner 安徽仁维环保工程科技有限公司