Method for biological purification of liquids and biological fil

Details Method for biological purification of liquids and biological fil Method for biological purification of liquids and biological fil

1996-07-10

1998-12-29

Woo, Jay H.

Liquid purification or separation

Structural installation

Closed circulating system

210151, 2101981, 210202, 210205, 210266, 210284, 210289, B01D 2402

Patent

active

058535780

ABSTRACT:
A biological filter for purification of liquids has primary filtering stages (52a, 52b, 52c) of a particulate material and secondary filtering stages (54, 56, 58) containing a fine-fiber material. The particulate material and fine-fiber material are covered with a biofloc film. The primary filtering stages (52a, 52b, 52c) and the secondary filtering stages (54, 56, 58) form a succession of filtering groups, and liquid is caused to move through the succession of filtering groups. Liquid is aerated during movement through the succession of filtering groups.

REFERENCES:
patent: 3649532 (1972-03-01), McLean
patent: 3933629 (1976-01-01), Smith
patent: 3956128 (1976-05-01), Turner
patent: 4274966 (1981-06-01), Palmer
patent: 5240611 (1993-08-01), Burton
patent: 5462666 (1995-10-01), Kimmel
patent: 5578214 (1996-11-01), Yamasaki et al.

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