Anoxybiotic/aerobic two-section internal electrolysis organic waste water treating method

A technology of organic wastewater and internal electrolysis, which is applied in the field of water treatment, can solve the problems of large area occupied by the device, easy compaction of fillers, and large sludge production, and achieve the effects of reduced treatment costs, reduced iron slag, and accelerated mass transfer

Inactive Publication Date: 2007-03-28
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

But at the same time, it is found that there are some problems in the actual application of internal electrolysis: the filler is easy to harden, the amount of mud produced is relatively large, it is troublesome to replace the anode after consumption, the device occupies a large area and the investment is high when treating large-flow wastewater.

Method used

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  • Anoxybiotic/aerobic two-section internal electrolysis organic waste water treating method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-13

[0025] The following examples 1-13 are advanced treatment of landfill leachate with the single tank static flow process of the present invention

[0026] The waste water was taken from the landfill leachate treated by mineralized garbage bed in Shanghai Waste Laogang Landfill, with a COD of 538 mg·L -1. The waste water was left in the internal electrolysis device for 30 minutes in anoxic and aerated states respectively, and the COD value of the supernatant was measured after the effluent was settled by adding alkali.

[0027] The influence of different initial pH values ​​of embodiment 1-4 on COD removal rate

[0028] Regulate landfill leachate initial pH to 3.0 (embodiment 1), 5.0 (embodiment 2), 7.0 (embodiment 3), 8.5 (embodiment 4) with acid, be 1: 2 with solid-liquid ratio, aeration rate is 100L·h -1 Carry out test, removal rate is as shown in table 1:

[0029] Table 1 Effect of different initial pH values ​​on COD removal rate (%) of landfill leachate

[0030] ...

Embodiment 5-8

[0032] Embodiment 5-8: Effect of different solid-liquid ratios on COD removal effect

[0033] For wastewater with an initial pH of 5.0, the aeration rate is 100L h -1 , be respectively: 1: 1 (embodiment 5), 1: 2 (embodiment 6), 1: 3 (embodiment 7), 1: 4 (embodiment 8) test with solid-liquid ratio. The results are shown in Table 2:

[0034] Table 2 Effect of different solid-liquid ratios on COD removal rate (%) of landfill leachate

[0035]

[0036] As the solid-liquid ratio decreases, the removal effect decreases. This is because with the decrease of the solid-liquid ratio, the contact area between the iron filings activated carbon and the wastewater decreases, and the micro-electrolysis reaction in the unit wastewater decreases, resulting in a decrease in the quality of the effluent. And in the test, the COD removal effect of the solid-liquid ratio of 1:1 and 1:2 is not much different, so it is economical and reasonable to adopt the solid-liquid ratio of 1:2.

Embodiment 9-12

[0037] Embodiment 9-12: the influence of different aeration rates on the removal effect

[0038] Adjust the pH of the influent to 5.0, set the solid-liquid ratio to 1:2, and adjust the aeration rate to 0L·h -1 (Example 9), 50L h -1 (Example 10), 100L h -1 (Example 11), 150L h -1 (Example 12) Test was carried out.

[0039] The test results are shown in Table 3:

[0040] Table 3 Effect of different aeration rates on COD removal rate (%) of landfill leachate

[0041]

[0042] The research results show that under acidic and oxygenated conditions, the internal electrolysis reaction rate can be increased and the wastewater treatment effect can be increased.

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Abstract

The invention relates to an anoxic/aerobic, two-stage, internal- electrolysis organic waste water treating method, fully mixing iron chips and activated carbon/copper chips in a certain mass ratio, and placing their mixture into a reactor, regulating waste water pH value and then adding the waste water into the reactor in the fixed solid-liquid ratio, firstly making anoxic internal electrolysis reation for a certain period of time and then making aerobic reaction for a certain period of time, adding alkali in the effluent water to make mixing coagulation settlement and discharging supernatant. And the treating mode can adopt a single- groove static flow mode or double-groove continous flow mode. And it fully uses redox reaction to degrade organic matters, and has stronger ability to degreade organic matters difficult to degrade and more remarkable decoloring effect.

Description

technical field [0001] The invention relates to a method for anoxic / aerobic two-stage internal electrolytic treatment of organic wastewater, which combines the two process conditions of internal electrolytic anoxic and aerobic, and treats difficult organic wastewater by first reducing and then oxidizing. degrade organic matter. It belongs to the technical field of water treatment. Background technique [0002] At present, with the increasing types of domestic sewage and industrial wastewater, the components are more complex, and wastewater treatment is becoming more and more difficult. With the development of wastewater treatment technology so far, some wastewater with simple components, good biodegradability, and low concentration can be treated by combining traditional processes, such as biological treatment, coagulation, and chemical precipitation. However, many wastewaters contain many refractory organic substances, such as phenols, alkylbenzenesulfonic acids, chloroph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F3/30
Inventor 贾金平徐新燕吕洲王亚林
Owner SHANGHAI JIAO TONG UNIV
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