Liquid purification or separation – Processes – Chemical treatment
Patent
1979-01-22
1980-10-28
Therkorn, Ernest G.
Liquid purification or separation
Processes
Chemical treatment
210764, 422 24, 422 29, C02B 308
Patent
active
042305713
ABSTRACT:
A method and apparatus for the purification of water with ozone and ultraviolet radiation. Oxygen-containing gas, such as air, is directed to flow in a confined path past an untraviolet radiation source, such as a mercury vapor lamp. The absorption of ultraviolet radiation by oxygen produces ozone which is entrained in the flowing gas. The gas is next mixed with the contaminated water and the mixture of water and ozone is then directed past the same ultraviolet source in a path isolated from the confined path of gas alone. The ozone in the water acts directly to kill bacteria and viruses and to oxidize undersirable compounds in the water. The ultraviolet radiation also acts directly to kill bacteria and viruses in the water. Additionally the ultraviolet radiation acts as a catalyst for the disinfecting and oxidizing action of the ozone, so that water purification occurs much faster than would occur if the ozone were acting alone.
REFERENCES:
patent: 854965 (1907-05-01), Potter
patent: 3326747 (1967-06-01), Ryan
patent: 3336099 (1967-08-01), Czulak et al.
patent: 3674216 (1972-07-01), Blair
patent: 3920547 (1975-11-01), Garrison
patent: 3948772 (1976-04-01), Ellner
patent: 4045316 (1977-08-01), Legan
patent: 4141830 (1979-02-01), Last
Evolution of the Ozone/UV Process for Waste Water Treatment, Prengle, presented at IOI/EPA Colloquium on Waste Water Treatment and Disinfection with Ozone at EPA/MERL, Cincinnati, OH, Sep. 15, 1977, Beginning-p. 49.
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