Method for treating nitrobenzene wastewater by using ozone biological aerated filter and application thereof
A technology of nitrobenzene wastewater and biofilter, which is applied in the direction of sustainable biological treatment, biological water/sewage treatment, oxidized water/sewage treatment, etc., can solve the problems of long residence time, large floor area, and high treatment cost. Reach the effect of reducing treatment cost, reducing dosage, and efficiently degrading
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Embodiment 1
[0038] The structure of the device used to process nitrobenzene waste water in the present invention is as figure 1 As shown, it comprises a water tank 1, a pump 2, a reactor 3, an ozone generator 6, an oxygen cylinder 7, an exhaust absorption bottle 8 and a tail water tank 9, and the bottom of the reactor 3 is provided with a water inlet and an air inlet, and the reactor 3 The upper part is provided with air outlet 4 and water outlet 5, and air outlet 4 is connected with tail gas absorption bottle 8, and water outlet 5 is connected with tail water tank 9. The water tank 1 is connected to the pump 2, the pump 2 is connected to the water inlet of the reactor 3 through a pipeline, and the air inlet of the reactor 3, the ozone generator 6 and the oxygen bottle 7 are connected through pipelines in sequence.
[0039] For the treatment of nitrobenzene wastewater, the nitrobenzene wastewater in this embodiment is nitrobenzene, NH 4 Cl, KHPO 4 , and ethanol, in which the concentrati...
Embodiment 2
[0045] Start the ozone biological aerated filter according to steps (1) to (3) in Example 1, the difference is that the hydraulic retention time during the operation of the biological aerated filter in step (4) is 8 hours, and it runs for half a month , sampling analysis every day, the final removal rate of nitrobenzene was 94%, the removal rate of COD was 96%, and the removal rate of ammonia nitrogen was 76%.
Embodiment 3
[0047] Start the ozone biological aerated filter according to steps (1)~(3) in embodiment 1, the difference is that the hydraulic retention time in the biological aerated filter operation process in the step (4) is 10 hours, and the ozone concentration is 100mg / L, running for half a month, sampling analysis every day, the final removal rate of nitrobenzene was 99%, the removal rate of COD was 96%, and the removal rate of ammonia nitrogen was 78%.
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