Multiple tank high solids anaerobic digester
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 10, 2020
Grant Date -
Oct 5, 2017
app pub date -
Jun 20, 2017
filing date -
Oct 19, 2011
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A multi-stage anaerobic digester is designed to treat a high solids, stackable feedstock. The system may also receive a pumpable feedstock such as a slurry or sludge. In a first stage, the digestate circulates in one direction around a raceway such that the digestate may pass a feed inlet multiple times before leaving the first tank. An optional side stream loop withdraws fibrous material from near the top of the raceway and return digestate with chopped fibers, preferably lower and further along the raceway. An outlet from the raceway located near, but upstream of, the feed inlet discharges partially digested substrate to a second stage, which is operated as a stirred tank reactor. The two stages may be provided in a single tank with an internal wall separating a ring shaped outer portion from a cylindrical inner portion. The digester may be operated in a thermophilic temperature range.
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Cited Art Landscape
Patent Citation Ranking
- 1 Citation Count
- C12P Class
- 66.75 % this patent is cited more than
- 5 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | May 10, 2028 |
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