Chemistry: molecular biology and microbiology – Process of utilizing an enzyme or micro-organism to destroy... – Treating gas – emulsion – or foam
Patent
1998-07-06
2000-08-08
Redding, David A.
Chemistry: molecular biology and microbiology
Process of utilizing an enzyme or micro-organism to destroy...
Treating gas, emulsion, or foam
4352953, 210150, 210151, 210290, 210631, A61L 901
Patent
active
061000817
ABSTRACT:
Apparatus for the purification of waste water and/or waste gas using a biofilter containing a filtering material, wherein the waste water move downwardly thereinto while the waste gas move upwardly or downwardly thereinto, is disclosed. Also disclosed is an apparatus for simultaneous purification of waste water and waste gas, comprising a filtering material comprised of a succession of layers. More conveniently, the apparatus comprises sufficient filtering material between the gas inlet and water outlet to ensure that the water coming out of the apparatus has not been substantially contaminated by the upwardly moving waste gas. In a preferred embodiment, the upper layer of filtering carrier material has a substantially lower filtration capacity than a lower layer of filtering carrier material, to prevent clogging of the filtering material upon downward flow of the waste water. Further disclosed is an apparatus for simultaneous purification of waste water as waste gas moving both downwardly. A filtering composition for purification of waste water and/or waste gas is also disclosed. Finally, the invention relates to an apparatus and a filtering composition for the purification of various types of waste water and waste gas.
REFERENCES:
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patent: 4662900 (1987-05-01), Ottengraf
patent: 4997568 (1991-03-01), Vandervelde et al.
patent: 5206206 (1993-04-01), Buelna
patent: 5389248 (1995-02-01), Pare et al.
patent: 5626763 (1997-05-01), Mathews
Centre de Recherche Industrielle Du Quebec
Redding David A.
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