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A recycling clean sewage treatment method capable of reducing the amount of sludge

A sewage treatment method and technology of the treatment method, applied in the field of water treatment, can solve the problems of large amount of sludge, environmental pollution, waste of resources, etc., and achieve the effects of avoiding pollution, reducing environmental pollution, and reducing sludge quality.

Inactive Publication Date: 2019-01-25
李思琦
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem that the existing sewage treatment method has a relatively large amount of sludge, and the organic matter and nitrogen and phosphorus components in the sludge are directly discharged to cause waste of resources and environmental pollution, the present invention provides a cyclic cleaning system that can reduce the amount of sludge. sewage treatment method

Method used

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  • A recycling clean sewage treatment method capable of reducing the amount of sludge

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] (1) Biological treatment step

[0053] The sewage is transported to the anaerobic tank for anaerobic treatment, and the residence time of the sewage in the anaerobic tank is 0.5 hours.

[0054] The sewage discharged from the anaerobic tank is transported to the first aeration tank for aerobic biological treatment, wherein the ventilation volume in the tank is controlled at 0.1vvm, the pH is controlled at 5.0-5.5, and the sewage is in the first aeration tank. The residence time was 3 hours.

[0055] The sewage discharged from the first aeration tank is transported to the anaerobic tank for denitrification and phosphorus removal treatment, wherein the residence time of the sewage in the anaerobic tank is 1.5 hours.

[0056] The sewage discharged from the anaerobic tank is transported to the second aeration tank for aerobic biological treatment, wherein the ventilation volume in the tank is controlled at 1.0vvm, the pH is controlled at 5.5-6.0, and the sewage is in the se...

Embodiment 2

[0063] (1) Preprocessing step

[0064] The sewage is transported to the grit chamber for sedimentation to remove the large particle sediments, and then the sewage discharged from the grit chamber is passed through the grid to remove the suspended solids in the sewage.

[0065] (2) Biological treatment step

[0066] The sewage was transported to the anaerobic tank for anaerobic treatment, and the residence time of the sewage in the anaerobic tank was 1.0 hours.

[0067] The sewage discharged from the anaerobic tank is transported to the first aeration tank for aerobic biological treatment, wherein the ventilation volume in the tank is controlled at 0.5vvm, the pH is controlled at 7.5-8.0, and the sewage is in the first aeration tank. The residence time was 5 hours.

[0068] The sewage discharged from the first aeration tank is transported to the anaerobic tank for denitrification and phosphorus removal treatment, wherein the residence time of the sewage in the anaerobic tank ...

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Abstract

The invention relates to a circulating cleaning sewage treatment method capable of reducing the amount of sludge. The method comprises the following steps: (1) Biological treatment step: passing the sewage through the anaerobic tank, the first aeration tank, the anaerobic tank and the second aeration tank in sequence; The final sewage is transported to the sedimentation tank to obtain sedimentation sludge and clarified liquid; (3) sludge cracking step: transport the sedimentation sludge to the sludge cracking tank, and then add boron oxide and glycerol to the sedimentation sludge The sludge is decomposed to obtain the decomposed sludge and recovery liquid; wherein, the recovery liquid is transported to an anaerobic pool. The method not only reduces the quality of the sludge, but also returns the recovered liquid obtained after cracking to the anaerobic pool for use, thereby reducing environmental pollution and cost. In addition, the nitrogen and phosphorus contained in the recovered liquid can also be removed and absorbed through aerobic biological treatment, so as to avoid pollution caused by discharge into the external environment.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a circulating clean sewage treatment method that can reduce the amount of sludge. Background technique [0002] Due to human life and production activities, water use and drainage have both quantitative and qualitative impacts on the natural cycle of water. This effect has been exacerbated by population growth and the development of industrial and agricultural production since the mid-20th century. The discharged sewage has constituted serious pollution to the water environment and ecosystem, deteriorating the quality of surface water and even groundwater, and killing aquatic animals and plants. Since the early 1980s, my country's industry, agriculture and population have developed rapidly. The total annual discharge of industrial wastewater and urban sewage has reached about 40 billion cubic meters, and the treatment efficiency is low. 80% of rivers and lakes are pollut...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
CPCC02F1/283C02F1/52C02F3/308C02F9/00C02F2209/08C02F2301/046C02F2303/06
Inventor 李思琦
Owner 李思琦