Front, middle and rear ozone and central aerated biological activated carbon water supply treatment method

A technology of biological aeration and water treatment, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., to reduce ozone dosing rate, prevent microbiological leakage, and improve removal rate Effect

Inactive Publication Date: 2012-01-04
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the existing ozone-biological activated carbon process for drinking water sources that are slightly polluted by ammonia nitrogen and organic matter, and to provide an ozone-biological activated carbon process method in which the ozone dosing method is optimized to improve the water supply of the waterworks water quality

Method used

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  • Front, middle and rear ozone and central aerated biological activated carbon water supply treatment method
  • Front, middle and rear ozone and central aerated biological activated carbon water supply treatment method
  • Front, middle and rear ozone and central aerated biological activated carbon water supply treatment method

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Experimental program
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Effect test

Embodiment 1

[0033] The concentration of ammonia nitrogen in the test raw water is 0.6-3.8mg / L, COD Mn 2.7~6.5mg / L.

[0034] Such as image 3 Shown, a kind of pre-, middle and post-ozone and middle aeration biological activated carbon process comprises the following steps:

[0035] (1) Before the raw water enters the ozone contact tank, add ozone in the tank to pre-oxidize the raw water. Calculated according to the volume of raw water, the ozone dosing rate is 0.5mg / L, and the contact time is 5min;

[0036] (2) Step (1) Before the effluent enters the coagulation reaction tank, add the coagulant polyaluminium chloride. Calculated according to the volume of the raw water, the dosage is 80mg / L. After fully mixing, carry out the coagulation reaction and precipitation for 10-15 minutes . The influent turbidity is 20-40NTU, and the effluent turbidity is 1.0-1.7NTU;

[0037] (3) The effluent from step (2) enters the medium ozone contact pool, and ozone is added into the pool to oxidize and de...

Embodiment 2

[0044] The concentration of ammonia nitrogen in the test raw water is 0.2-0.8mg / L, COD Mn 1.7~4.5mg / L.

[0045] Such as image 3 Shown, a kind of pre-, middle and post-ozone and middle aeration biological activated carbon process comprises the following steps:

[0046] (1) Before the raw water enters the ozone contact tank, add ozone in the tank to pre-oxidize the raw water. Calculated according to the volume of the raw water, the ozone dosing rate is 0-0.5 mg / L, and the contact time is 5 minutes;

[0047] (2) Step (1) Add coagulant polyaluminium chloride before the effluent enters the coagulation reaction tank. Calculated according to the volume of raw water, the dosage is 30mg / L. After fully mixing, coagulation reaction and precipitation are carried out. The turbidity of the influent water is 20-40NTU, and the turbidity of the effluent water is 0.9-1.5NTU. The pre-ozone coagulation effect is not obvious, and other pre-oxidation methods can be used instead;

[0048] (3) Th...

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Abstract

The invention discloses a front, middle and rear ozone and central aerated biological activated carbon water supply treatment method. The method comprises the following steps: (1) causing raw water to enter a front ozone contact pool, and introducing ozone into the pool for preoxidation; (2) adding a coagulant and a coagulant aid into effluent in step (1), sufficiently mixing and carrying out coagulation reaction and precipitation in a coagulation precipitation pool; (3) introducing effluent in step (2) into a middle ozone contact pool, and introducing ozone into the pool for oxidation; (4) introducing effluent in step (3) into an aerated biological activated carbon filter, and blasting and aerating the filter; (5) adding chlorine into effluent in step (4), then entering a rear ozone contact pool, and introducing ozone into the pool to disinfect; and (6) causing effluent in step (5) to flow into a sand filtering pool, and filtering killed microorganisms and residual turbid matters in water to obtain treated clear water. In the method, an ozone adding mode is optimized, and the sand filtering pool is brought up the rear, thereby improving the effects on removing ammonia nitrogen and organic matters and killing microorganisms as well as lowering the total ozone adding rate.

Description

technical field [0001] The invention relates to the technical field of water supply treatment, in particular to the technical field of purifying slightly polluted drinking water sources, and in particular to a water supply treatment method with front, middle and post ozone and middle aeration biological activated carbon. Background technique [0002] At present, my country generally adopts figure 1 The conventional water purification process of "raw water→coagulation→sedimentation→sand filtration→disinfection" is shown to produce tap water. In recent years, urban drinking water sources have become more and more polluted. With the improvement of urban water quality standards in my country, conventional water purification processes with deturbidity and sterilization as the main functions have been difficult to adapt to existing water sources and water quality standards. Therefore, new water supply treatment technologies must be developed to adapt to deteriorating water supply...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 陆少鸣王建平
Owner SOUTH CHINA UNIV OF TECH
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