Process for working up waste water containing phosphorus

Details Process for working up waste water containing phosphorus Process for working up waste water containing phosphorus

1981-10-05

1983-08-16

Wyse, Thomas G.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210781, 210906, C02F 158

Patent

active

043990371

ABSTRACT:
The invention relates to a process for working up phosphorus-containing waste water by subjecting it to filtration with the use of a filter aid in a centrifugal filter. To this end, waste water with a temperature of at least 46.degree. C. and a pH-value within the range 0.5 to 4.0 is introduced into the centrifugal filter and fitrate coming from the centrifugal filter is introduced into a calming zone and separated therein within an average period of 10 to 60 minutes into yellow phosphorus and water containing 1 to 30 ppm of phosphorus. Water overflowing from the calming zone is treated with an oxidant and the waste water so freed from phosphorus is reacted with a neutralizing agent.

REFERENCES:
patent: 3480144 (1969-11-01), Barth et al.
patent: 3634231 (1972-01-01), Dunseth et al.
patent: 3684461 (1972-08-01), Muller et al.
patent: 4257898 (1981-03-01), Meurer et al.
Horten et al., Sewage and Industrial Wastes, vol. 28, 1956, pp. 70-77.
Schlackenatlas (Slag Atlas), Ed. Verein deutscher Eisenhuettenleute, Verlag Stahleisen m.b.H., Duesseldorf, 1981, p. 106.
Chemische Technologie, 3rd Ed., vol. 1, Ed. Winnacker et al., Carl Hanser Verlag, Munich 1980, p. 390.

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