KR900017928A - Method and apparatus for wastewater treatment by ozone - Google Patents

Abstract

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Description

Method and apparatus for wastewater treatment by ozone

Since this is a trivial issue, I did not include the contents of the text.

FIG. 1 is a schematic view of a method for treating wastewater using ozone from an ozone generator according to the present invention.

Claims (3)

CN ^-, Pb ^+2, Cu ^+2, Cr ^+2, Cd ^+2, and the like ^_ Cl, NH ₄ ^+, F ^-, NO ₃ ^-, tartrate, citrate, chloride, hydroxide, etc. The different mix heavy metal waste in the method, a) the primarily chelating bond causing cause element jeohaeeul during insolubilization treatment of the heavy metal by being redissolved to form a Nina complex _{^{CN -, Cl -, NH 3}} +, F -, NO 3 -, A step of oxidizing and decomposing stannates, citrates, chlorides, hydroxides and the like with ozone (O ₃ ), and b) releasing secondarily heavy metals belonging to specific harmful substances into a waste which is insolubilized and not re- Wherein the method comprises the steps of: The method of claim 1 wherein the eductor CN of the waste water in 15 ^- the ratio by weight of ozone concentration versus 1: The CU ⁺² for the promotion of the above-mentioned oxidative decomposition of ozone to be injected is 2.5 to 3.5, and the reactor (16) Characterized in that a catalyst based on CuSO ₄ as a carrier is used and PH is maintained at 9-10. The apparatus for treating heavy metal wastewater according to any one of claims 1 and 2, characterized in that air compressed in the air compressor (or blower) (1) is introduced into the ozone generator (1) (70 ° C - 100 ° C) and outlet temperature 220 ° C = 430 ° C through the after-cooler (2) at a temperature of -7 ° C / The most dust is removed by passing through a main filter 3 of 40 μm and injected at an inlet temperature of 22 ° C. to 43 ° C. of the air dryer 4. The compressed air at the inlet pressure of 2 ㎘ / ㎠-7 ㎘ / ㎠ can contain saturated water vapor of 0.7 g-0.91 g per unit of M ³ , removing moisture and passing through a 3 ㎛ filter built into the air dryer The filter 5 separates the oil and the large moisture from the air, and passes pure water through the 1 탆 filter and the 0.01 탆 filter to the ozone generator 8. The inflow temperature is 30-35 캜 and the gas regulator 7 ) yideok O ₃ (ozone) a controlled inlet pressure to 10PISG-30PISG and generated by the ozone generator 8 via a chaekkeu valves 10 to prevent back flow of ₀₃ (ozone) through the gas flow meter 19 at the emitter (15), and is adjusted to a catalyst Cu ⁺² compound and PH: 9-10 in a wastewater reservoir (11), and is supplied to the eductor (15) at a water pressure of 1 kPa / O ₃ (ozone), the ratio of O3 (ozone) gaseuyang of the flow rate when in contact with the gas in inhibiting element concentration (ppm) in the waste water storage tank (11) 1 (3 The flow rate is regulated in the metering pump 12 and regulated in the flow meter 13 and flowed into the eductor 15 through the backflow preventive valve and the eductor 15 has been described above positive ratio was 1 of insoluble inhibiting element concentration (ppm) and O ₃ (ozone) with O ₃ (ozone) which can oxidative decomposition of the waste water: yideok which can contact well mixed in (3-4) (weight ratio) vector ( 15). The principle is that the principle functions as an aspirator and the wastewater mixed and reacted with O ₃ (ozone) is continuously oxidized and decomposed in the reactor 16, so that the residence time in the reactor 16 is 20 minutes to 40 minutes. (18). The heavy metal wastewater treatment device according to claim 1, ※ Note: It is disclosed by the contents of the first application.