Claims
- 1. In the process for the biotreatment of an aqueous waste stream or contaminated vapor with a bioremediation catalyst comprising a bioremediation support having a catalytically effective amount of a microorganism supported thereon, the improvement which comprises using as the bioremediation support 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 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.sup.2 /g.
- 2. A process according to claim 1, wherein the additional support material having adsorption capabilities is activated carbon.
- 3. A catalyst for the biotreatment of aqueous waste streams or contaminated vapors comprising a catalyst support having deposited on at least one surface thereof a catalytically effective amount of a microorganism which biodegrades waste streams or contaminated vapors, wherein said catalyst support is a bioremediation support which comprises 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 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.sup.2 /g.
- 4. A catalyst according to claim 3, wherein the microorganism is a bacteria selected from the group consisting of Pseudomonas, Acinetobacter, Mycobacterium, actinomycetes, Corynebacterium, Arthrobacterium, Bacillus, Flavobacterium, Nocardia, Achromobacterium, Alcaligenes, Vibrio, Azotobacter, Beijerinckia, Xanthomonas, Nitrosomonas, Nitrobacter, Methylosinus, Methylococcus and Methylobacter.
- 5. A catalyst according to claim 3, wherein the microorganism is a member selected from the group consisting of fungi, yeast, algae and protozoans.
- 6. A catalyst according to claim 3, wherein the pumice is a low-density siliceous glassy material.
- 7. A method of preparing a bioremediation support for the support of a catalytically effective amount of microorganisms for the biotreatment of an aqueous waste stream or contaminated vapor, the method comprising forming a support from a pumice material and at least one additional support material having adsorption properties or buffering capacity, wherein said pumice material has
- a cellular or frothy texture;
- macropores of greater than 1,000 .ANG. in diameter dispersed throughout the material;
- a macropore volume in pores 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.sup.2 /g.
- 8. A method according to claim 7 wherein the bioremediation support is formed by
- (a) forming a bioremediation support of the pumice material; and
- (b) applying to the bioremediation support the additional support material.
- 9. A method according to claim 8 wherein the additional support material is activated carbon and the carbon is applied to the bioremediation support by impregnating the bioremediate support with a carbon containing compound and converting said compound to activated carbon.
- 10. A method according to claim 7, wherein the bioremediation support is formed by
- (a) mixing the pumice material and the additional support material;
- (b) extruding the mixture into a shaped support media; and
- (c) firing said shaped support media to bond the constituent grains.
- 11. A method according to claim 10 wherein the additional support material is zeolite.
- 12. A method according to claim 7 wherein the additional support material is a zeolite and the zeolite is applied to the bioremediation support by coating.
Parent Case Info
This is a division of application Ser. No. 08/084,850, filed Jun. 29, 1993, now U.S. Pat. No. 5,397,755.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
3929630 |
Smith |
Dec 1975 |
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Divisions (1)
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Number |
Date |
Country |
Parent |
84850 |
Jun 1993 |
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