The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 18, 2008
Filed:
Sep. 18, 2002
Son Le, Cheshire, GB;
Son Le, Cheshire, GB;
United Utilities PLC, Cheshire, GB;
Abstract
A method of treating sewage sludge comprises a pathogen reduction stage in which raw sludge is incubated for a predetermined incubation period at a temperature in the mesophilic temperature range. The sludge is incubated in a plurality of sequential vessels () comprising an upstream vessel () which receives the raw sludge to be incubated and a downstream vessel () which discharges the incubated sludge. The sludge is fed from the upstream vessel () to the downstream vessel (), via any intermediate vessels (), and subsequently discharged after spending a predetermined residence time in each vessel, the total residence time being said predetermined incubation period.