Liquid purification or separation – Processes – Treatment by living organism
Patent
1994-07-26
1995-11-14
Hruskoci, Peter A.
Liquid purification or separation
Processes
Treatment by living organism
210617, 210631, 210760, C02F 900, C02F 178
Patent
active
054663741
ABSTRACT:
A process for purifying organically polluted water containing organic nutrients for microorganisms, the process including (a) mixing the organically polluted water intensively with ozone in an ozone treatment unit; (b) adding to the water of step (a) at least one compound containing sulfur, which at least one compound containing sulfur is bioavailable for assimilation by at least aerobic microorganisms; and (c) passing the water of step (b) through a filter composed of a plurality of different layers. The process may optionally include treating the water after step (c) with ozone in an ozone water treatment unit in order to oxidize residual bioavailable sulfur. The at least one compound containing sulfur is preferably added in an amount which is effective to at least eliminate sulfur deficiency of the aerobic microorganisms and promote growth of a biofilm in the filter thereby contributing to biological mineralization of the organic nutrients.
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Ursula Obst, et al., Biotechnologie in der Wasserauf-bereitung, R. Oldenbourgh Verlag Muchen, Wien (1990), pp. 92-95.
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M. Schwartz et al.: A Study of the Feasibility to Achieve Resusadle Water by Ozonation-Biological Activated Carbon Technology. In: Water Reuse Symposium: Proceedings, 2, 1981, pp. 1184-1218.
Bachhofer Bruno
Locher Anton
Green Theodore M.
Hruskoci Peter A.
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