Method and system for treating wastewater
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 13, 2014
Grant Date -
Jun 9, 2011
app pub date -
Dec 7, 2010
filing date -
Dec 7, 2009
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Methods and systems for utilizing biological wastewater treatment processes to remove nutrients from wastewater containing reduced sulfide compounds may include treating the wastewater in an anaerobic zone, an anoxic zone, and an aerobic zone. The wastewater is first treated in the anaerobic zone to uptake residual biodegradable organic material using specialized bacteria known as phosphorus accumulating organisms (“PAOs”) and glycogen accumulating organisms (“GAOs”). After treatment in the anaerobic zone, the wastewater is treated in an anoxic zone to convert nitrates to nitrogen gas and sulfur to sulfates. Following treatment in the anoxic zone, the wastewater is treated in the aerobic zone to oxidize ammonia to nitrate and to complete removal of phosphorus. After treatment in the aerobic zone, the wastewater may be treated in other zones, or may be delivered to a liquid-solids treatment stage.
First Claim
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International Classification(s)
- 2010 Application Filing Year
- C02F Class
- 850 Applications Filed
- 596 Patents Issued To-Date
- 70.12 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 1 Citation Count
- C02F Class
- 12.25 % this patent is cited more than
- 11 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Nov 13, 2025 |
