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Biochemical treatment-ozonation coupled sewage treatment method and application thereof

A sewage treatment method and ozone oxidation technology, which are applied in the fields of oxidized water/sewage treatment, biological water/sewage treatment, special compound water treatment, etc., which can solve the problems of increased investment cost and floor space.

Pending Publication Date: 2020-12-25
BLUESTAR LEHIGH ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this invention further increases the post-ozone oxidation tank treatment unit after the ozone oxidation-biological aerated filter tank, resulting in increased investment costs and floor space

Method used

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  • Biochemical treatment-ozonation coupled sewage treatment method and application thereof
  • Biochemical treatment-ozonation coupled sewage treatment method and application thereof
  • Biochemical treatment-ozonation coupled sewage treatment method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0101] Municipal sewage, COD 450mg / L, NH 3 -N 25mg / L, TN 30mg / L, SS 80mg / L, adopt method A respectively (attached Figure 5 ), method B (attached figure 1 A) and method C (attached figure 1 B) carry out treatment, sewage treatment scale Q=1m 3 / h, the ozone reaction time is 60min, the front-end biochemical unit adopts the anaerobic hydrolysis-A / O-secondary sedimentation tank process and the residence time is 18h; the back-end advanced treatment unit ozone oxidation returns to the anaerobic hydrolysis section, and q =0.1~3m 3 / h, and the dosage of ozone is 20mg / L. The wastewater treatment effects of different methods and conditions are shown in Table 1 below.

[0102] Table 1 Effect of biochemical treatment-ozone oxidation coupling method on municipal sewage treatment

[0103]

[0104] As can be seen from Table 1, the method A of the present invention is used to process the above-mentioned municipal sewage, there is no back-end biochemical treatment after the ozone ox...

Embodiment 2

[0107] Municipal sewage, water quality is identical with embodiment 1, adopts method A, method B respectively (attachment figure 1 A) and method C (attached figure 1 B) carry out treatment, sewage treatment scale Q=1m 3 / h, the ozone reaction time is 60min, the front-end biochemical unit adopts anaerobic hydrolysis-A / O-secondary sedimentation tank, and the total residence time is 15h; the back-end ozone oxidation unit effluent returns to the anaerobic hydrolysis section and q=0.1 ~3m 3 / h, and the dosage of ozone is 20mg / L. The wastewater treatment effects of different methods and conditions are shown in Table 2 below.

[0108] Table 2 Effect of biochemical treatment-ozone oxidation coupling method on municipal sewage treatment

[0109]

[0110] As can be seen from Table 2, the method A of the present invention is used to process the above-mentioned municipal sewage, there is no back-end biochemical treatment behind the ozone oxidation unit, and the effluent of the ozo...

Embodiment 3

[0114] Municipal sewage, water quality is identical with embodiment 1. Method A and method B were used respectively (attached figure 1 A) and method C (attached figure 1 B) carry out treatment, sewage treatment scale Q=1m 3 / h, and the ozone reaction time is 60min. The difference is that the front-end biochemical units all adopt anaerobic hydrolysis-A / O-secondary sedimentation tank-contact oxidation process, and the total residence time is 18h; the back-end ozone oxidation unit effluent returns to Contact oxidation section and q=0.3~3m 3 / h, and the dosage of ozone is 20mg / L. The wastewater treatment effects of different methods and conditions are shown in Table 3 below.

[0115] Table 3 Effect of biochemical treatment-ozone oxidation coupling method on municipal sewage treatment

[0116]

[0117] As can be seen from Table 3, the method A of the present invention is used to process the above-mentioned municipal sewage, and there is no back-end biochemical unit after t...

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Abstract

The invention discloses a biochemical treatment-ozonation coupled sewage treatment method and application thereof. The sewage treatment process comprises pretreatment, biochemical treatment and advanced treatment, wherein the advanced treatment is ozonation; outlet water of a rear-end ozone oxidation unit flows back to a front-end biochemical unit, a sewage biochemical treatment system and a sewage advanced treatment ozonation system which are relatively independent are combined, and the outlet water reflux ratio of the ozonation unit is adjusted and the reflux outlet water flows back to different positions of the biochemical unit, the ozonation effect of advanced sewage treatment can be improved, and meanwhile, the reduction of the ozonation treatment cost, the engineering investment andthe occupied area of the advanced sewage treatment is realized. The method disclosed by the invention is applied to advanced sewage treatment, municipal sewage treatment or industrial sewage treatment, and the degradation capacity of a front-end biochemical treatment system on COD (Chemical Oxygen Demand), ammonia nitrogen and total nitrogen and the operation stability of the system can be improved through the dilution effect of reflux sewage of the ozonation unit and the toxicity reduction effect of ozone in the reflux sewage.

Description

technical field [0001] The invention belongs to the technical field of ozone oxidation treatment of sewage, and in particular relates to a sewage treatment method coupled with biochemical treatment-ozone oxidation and an application thereof. Background technique [0002] Both biochemical technology and ozone oxidation technology are conventional sewage treatment methods. The cost of biochemical technology for sewage treatment is much lower than that of ozone oxidation, but it cannot degrade organic pollutants with complex structures in sewage. Therefore, it is difficult for sewage to meet the current stringent sewage discharge standards using biochemical technology alone. Ozone oxidation technology can completely degrade organic pollutants with complex structures in sewage, but the cost of sewage treatment, especially the cost of COD degradation per unit, is much higher than that of biochemical technology, so it is rarely used as the main process of sewage treatment alone, b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/28C02F103/30C02F103/34C02F103/36
CPCC02F9/00C02F1/78C02F2305/00C02F3/00C02F3/02C02F3/28C02F3/30C02F1/725C02F2001/007C02F2103/30C02F2103/28C02F2103/365C02F2103/34C02F1/722C02F1/32C02F3/12C02F1/001C02F1/24
Inventor 徐军王强王开春张璐璐李坤张文杰田凤蓉孟庆强
Owner BLUESTAR LEHIGH ENG INST CO LTD
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