Process for the disinfection of sewage sludge
CA 1330239 C · Owner: Fuchs, Martin · Inventors: Fuchs, Leonhard; Fuchs, Martin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, The process for the disinfection of sewage sludge prior to introducing same into an anaerobic sewage sludge processing step involving the recovery of methane gas by heating the sewage sludge in a preceding disinfection step at from 50 °c to 70 °C and prefer-, ably at from 55 °C to 65 °C for a period of from 1 to, 72 hours, and preferably of from 12 to 36 hours while, thoroughly mixing the sewage sludge with an oxygencontaining gas is carried out by using as the oxgen-, containing gas, a mixture comprising from 10 to 70% by volume of fresh air and 30 to 90% by volume of vent gas from the disinfection step, the oxygen contents of the gas mixture being maintained …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted June 14, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 14, 2011.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.