Low density glassy materials for bioremediation supports
AssigneeW. R. Grace & Co.-Conn.
InventorsFrederick J. Parker, Awdhoot V. Kerkar, Rasto Brezny
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Abstract
A bioremediation support for the support of microorganisms used in the biotreatment of an aqueous waste stream or contaminated vapor is made of a low-density siliceous glassy material. This material has a cellular or frothy texture, large pores of greater than 1,000 Anstrom units in diameter dispersed throughout the material, a high macropore volume in pores of greater than 1,000 .ANG. of more than 0.3 cc/cc and a BET surface area of greater than 10 m.sup.2 /g. A preferred material is pumice.
Claims8
A bioremediation support for the support of microorganisms for the biotreatment of an aqueous waste stream or contaminated vapor, comprising a pumice material and at least one additional support material having adsorption properties or buffering capacity, said pumice material having
- a cellular or frothy texture;
- macropores of greater than 1,000 .ANG. in diameter dispersed throughout the material;
- a macropore volume in pores of greater than 1,000 .ANG. of more than 0.3 cc/cc;
- a particle size of about +3.5/-7 mesh in accordance with the Tyler convention;
- a bulk density of from about 0.8 to about 1.2 g/cc;
- and
- a BET surface area of greater than 10 m.sup.2 /g.
Dependencies are inferred from the claim text.