ALEXANDRIA, Va., March 24 -- United States Patent no. 12,583,801, issued on March 24, was assigned to ThioSolv LLC (Largo, Fla.).
"Process for producing fertilizer from a biogas stream" was invented by Michael F. Ray (Clearwater, Fla.) and Michael James Ray (St. Petersburg, Fla.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A process for producing organic fertilizers involves using a waste ammonia stream to capture sulfur dioxide from the oxidation of sulfur or a gas containing sulfur dioxide to make an ammonium bisulfite/sulfite solution. The sulfite solution is used to scrub hydrogen sulfide out of a biogas or other gas stream. The resulting products contain ammonium thiosulfate and ammonium bisulfite/sul...