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US 5,635,394 AGranted
Arrangement for air purification
AssigneeBraun Intertec Corporation
InventorRobert J. Horn
Life of this patent
Estimating the term…
Abstract
An arrangement for conducting air filtration by biofilter operation is provided. The arrangement generally includes at least one bioreactor bed, through which air to be purified is passed. Preferably the arrangement is configured so that air flow through each tank is from the top downwardly. In general, the biofiltration operation is conducted under pressures of less than ambient, to advantage.
Claims28
A biofilter arrangement for air treatment;
- said arrangement comprising:
- (a) a first bioreactor treatment tank having a closed top, a closed bottom and a sidewall and
- (b) an air draw apparatus constructed and arranged to draw air through said first bioreactor treatment tank, from an upper portion thereof to a bottom portion thereof, while maintaining a pressure within said first tank of less than ambient;
- (i) said biofilter arrangement being constructed and arranged to support operation with an air flow therethrough of up to at least 7500 ACFM.
1 more element
A biofilter arrangement for air treatment;
- said arrangement comprising:
- (a) a first bioreactor treatment tank having a closed top, a closed bottom and a sidewall;
- (i) said first tank having a first dimension thereacross;
- (ii) said first tank having an air flow inlet in said closed top;
- said air flow inlet having a smaller dimension thereacross than said first dimension;
- (iii) said first tank including a bioreactor bed therein which is at least one foot thick and which has an upper surface spaced from said closed top of said first tank, by an open head space;
- (b) an air draw apparatus constructed and arranged to draw air downwardly through said first tank while maintaining a pressure of less than ambient within said tank, including in said head space between said bioreactor bed and said closed top.
4 more elements
An arrangement according to claim 28 wherein:
- (a) said first biofilter bed includes a layer of bark chips between said layer of rock and said layer of bacteria-loaded mix.
An arrangement according to claim 28 wherein:
- (a) said layer of bacteria-loaded mix includes peat and topsoil.
Dependencies are inferred from the claim text.