Ozonation-biochemical coupled water treatment method

A technology of ozone oxidation and biochemical treatment, applied in the field of water treatment, can solve the problem of high treatment cost and achieve the effect of increasing investment and land occupation

Pending Publication Date: 2020-10-09
BLUESTAR LEHIGH ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] What the present invention is to solve is the technical problem that the ozone oxidation-biochemical method treatment cost is higher in the existing water treatment technology, and the new technical problem that improves this and produces:

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Embodiment 1 (claim 1,2,3,4,5,6,7 and technical effect 1.)

[0070] A kind of tail water after two-stage biochemical treatment, COD150mg / L, SS30mg / L, TDS11000mg / L, use method A, method B and method C to treat wastewater respectively, and the scale of wastewater treatment is Q=1m 3 / h, the ozone reaction time is 60min, and the residence time of the biochemical device is 2h; the return flow rate of the ozone oxidation-biochemical coupling device q=1~6m 3 / h, and the dosage of ozone is 50mg / L. The wastewater treatment effects of different methods and conditions are shown in the table below.

[0071] The treatment effect of ozone oxidation-biochemical method under the different conditions of table 1

[0072]

[0073] When the total ozone dosage is the same, compared with method A (ozone oxidation-biochemical with external reflux) and method B (ozone oxidation without external reflux-biochemical), the COD concentration in the effluent is lower; compared with method C (mu...

Embodiment 2

[0074] Embodiment 2 (claims 1, 2, 3, 4, 5, 6, 7 technical effects 2.)

[0075] A kind of tail water after two-stage biochemical treatment, COD150mg / L, SS30mg / L, TDS11000mg / L, use method A and method C to treat wastewater respectively, wastewater treatment scale Q=1000m 3 / h, the ozone reaction time is 60min, and the residence time of the biochemical device is 2h; the return flow rate of the ozone oxidation-biochemical coupling device is q=1000~3000m 3 / h, and the dosage of ozone is 50mg / L. The floor area and investment cost of different methods and conditions are shown in the table below.

[0076] The treatment effect of ozone oxidation-biochemical process under different conditions in table 2

[0077]

Embodiment 3

[0078] Embodiment 3 (claims 5, 6, 7, 8, 9)

[0079] A kind of tail water after two-stage biochemical treatment, COD150mg / L, SS30mg / L, TDS11000mg / L, using method A with different conditions to treat wastewater, wastewater treatment scale Q=1m 3 / h, the ozone reaction time is 60min, and the residence time of the biochemical device is 2h; the return flow rate of the ozone oxidation-biochemical coupling device q=0.11~2.3m 3 / h, and the dosage of ozone is 50mg / L. The wastewater treatment effect of method A under different conditions is shown in the table below.

[0080] The treatment effect of ozone oxidation-biochemical process under different conditions in table 3

[0081]

[0082]

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Abstract

The invention discloses an ozonation-biochemical coupled water treatment method which comprises the following steps: sequentially carrying out front-end ozonation treatment and rear-end biochemical treatment on water to be treated, returning rear-end biochemical effluent to front-end ozonation inlet water, and carrying out flow return to circularly treat the water to be treated in an ozonation-biochemical system for multiple times. Due to the fact that the biodegradability of the to-be-treated water is improved to a certain extent in the ozonation stage each time, biodegradable ozonation products in each time are degraded in time in the biochemical treatment stage, and the synergistic coupling effect of biodegradability improvement of ozonation and low-cost biochemical mineralization is enhanced by controlling the biochemical effluent return ratio. According to the method, the treatment efficiency can be improved under the condition of the determined total ozone addition amount, the ozone consumption can be reduced under the condition of the determined removal rate, and the investment cost, the operation cost and the engineering land occupation of water treatment are reduced.

Description

technical field [0001] The invention belongs to the technical field of water treatment and the technical field of sewage treatment. The invention also belongs to the technical field of ozone oxidation application, and specifically relates to a water treatment method coupled with ozone oxidation and biochemistry. Background technique [0002] The oxidation of organic matter by ozone includes direct oxidation and indirect oxidation. The direct oxidation of ozone refers to the molecular ozone O 3 It reacts directly with organic matter, and its reaction mechanism mainly includes electrophilic reaction, nucleophilic reaction and nucleophilic reaction. The indirect oxidation of ozone refers to the self-decomposition of ozone after being induced to form the secondary oxidant hydroxyl radical OH and the oxidation reaction with organic matter. The oxidation mechanism mainly includes electrophilic addition reaction, dehydrogenation reaction and electron transfer reaction. Generally,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/30
CPCC02F1/32C02F1/722C02F1/725C02F1/78C02F3/00C02F2101/30C02F2209/08C02F2301/046C02F2305/023C02F2305/026
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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