Method and apparatus for cleaning a filter aid

Details Method and apparatus for cleaning a filter aid Method and apparatus for cleaning a filter aid

1995-10-24

1998-09-01

Gitomer, Ralph

Chemistry: molecular biology and microbiology

Process of utilizing an enzyme or micro-organism to destroy...

Destruction of hazardous or toxic waste

435264, 210632, 502412, C02F 100

Patent

active

058010513

ABSTRACT:
A method for removing organic contaminants including yeast cells from a particulate filter aid such as kieselguhr includes steps of producing an aqueous suspension of the contaminated filter aid, and adding to the suspension a mixture of enzymes (protease, amylase and glucanase) capable of dissolving yeast cell walls. Optionally, an oxidizer may also be added, and the suspension may be agitated ultrasonically. After sufficient time, the enzyme and dissolved organic contaminant are removed from the suspension by rinsing with dilute caustic soda, and the decontaminated filter aid is acid neutralized. Finally, the filter aid may be separated into coarse and fine fractions, and re-used.

REFERENCES:
patent: 3362533 (1968-01-01), Muller
patent: 5277819 (1994-01-01), Abrams

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