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. 13, 2018
Filed:
Sep. 18, 2014
Yara International Asa, Oslo, NO;
YARA INTERNATIONAL ASA, Oslo, NO;
Abstract
The invention relates to a process and a biofilter system () for removing HS from a HS contaminated energy production gas stream containing methane. The aqueous biofilter system comprises a biofilter () having biofilter support material constituting a biofilter bed supporting a humidified biofilm having microorganisms that are capable of oxidizing HS. The process comprises the steps of contacting the HS contaminated energy production gas stream with the microorganisms of the humidified biofilm, and oxidation of at least part of the HS in the HS contaminated energy production gas stream by the microorganisms, resulting in a HS depleted energy production gas stream, wherein the process further comprises the step of adding an aqueous nitrate solution to the HS contaminated energy production gas stream prior to being contacted with the microorganisms, enabling the microorganisms to oxidize the HS under anoxic conditions. The invention furthermore relates to the use of such a biofilter system () in the removal of HS from a HS contaminated energy production gas stream containing methane.