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US 6,638,338 B2Granted
Biological filter system and a housing for a biological filter system
OwnerJorgen Logstrupinventor
Life of this patent
Estimating the term…
Abstract
A method for cleaning and conditioning air in which the air is first passed through or along water in a reservoir, then passed through a layer of soil to clean and condition the air, and then passed through a layer of a germ-reducing material.
Claims11
A method for cleaning and conditioning air comprising the steps of:
- passing the air through or along water in a reservoir,
- passing the air through a layer of soil to clean and condition the air, and
- passing the air through a separate layer of a germ-reducing material.
A method for cleaning and conditioning air comprising the steps of:
- passing the air through or along a water reservoir,
- passing the air through a layer of soil to clean and conditioning the air, and
- passing the air through a germ-reducing layer wherein the temperature of the air is reduced by 1-8° C., preferably 3-8° C., more preferably 2-5° C., during the passage through the layer of soil.
A method for cleaning and conditioning air comprising the steps of:
- passing the air through or along a water reservoir,
- passing the air through a layer of soil to clean and conditioning the air,
- passing the air through a germ-reducing layer of a material selected from the group consisting of at least one of limestone, dolomite, calcite, magnesite, celluloses, hemicelluloses and woodchips.
Dependencies are inferred from the claim text.