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:
Feb. 04, 2014
Filed:
Apr. 15, 2010
Johannes Franciscus Maria Raap, 's-Hertogenbosch, NL;
Petrus Wilhelmus Alphonsus Maria Brooijmans, Dongen, NL;
Johannes Franciscus Maria Raap, 's-Hertogenbosch, NL;
Petrus Wilhelmus Alphonsus Maria Brooijmans, Dongen, NL;
Koninklijke Cooperatie Cosun U.A., Breda, NL;
Abstract
The invention pertains to a process for producing methane by a two-stage anaerobic digestion of organic feed, comprising i) subjecting an organic feed suspension (a) to acidogenesis and methanogenesis in a first reactor (); ii) withdrawing an effluent (b) from said first reactor and subjecting it to solid/liquid separation (), thus obtaining effluents high (d) and low (c) in solids, wherein the volatile fatty acid (VFA) concentration in said first reactor is controlled by the withdrawal rate; iii) subjecting the effluent low in solids (c) to acidogenesis and methanogenesis in a second reactor (), thus producing methane gas in said first and second reactor.