Method for producing a useful compound and treating a wastewater using pure oxygen
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
N/A
Issued Date -
Jun 15, 2006
app pub date -
Feb 3, 2004
filing date -
Feb 4, 2003
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A method of using pure oxygen in microbial fermentation processes and wastewater treatment processes, in which the pure oxygen is produced by a pressure swing adsorption (PSA) process from a gas mixture of air and unused oxygen-containing recycled off-gas from microbial processes which uses oxygen-containing gas in a liquid or gas state. When pure oxygen with a purity of more than 90% is used in microbial processes, microbial productivity can be about 5 times as increased as it is that in the conventional method using air with an oxygen content of 21%, and the volume of an active sludge tank in wastewater treatment processes can be reduced to at most 1/5 of the volume as compared to the conventional method. Also, the off-gas from such pure oxygen processes has a high oxygen content of about 70-80%. Thus, when the off-gas is recycled with air for the supplement of oxygen consumption, the gas mixture with an oxygen content of about 40% is used as feed gas for the PSA process, and CO2 generated by microbial breathing is also removed. Thus, the volume of a PSA column and an air compressor for supplying the feed gas can be reduced to less than 1/2 of the volume as compared to that of the use of air.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully