ALEXANDRIA, Va., March 17 -- United States Patent no. 12,577,516, issued on March 17.

"Plug flow fermenter for a biogas plant" was invented by Michael Niederbacher (Bruneck, Italy).

According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a plug flow fermenter (1) for a biogas plant, having a reactor container (2) designed as an elongated straight tube, in the reactor interior (9) of which a substrate to be fermented, preferably by dry fermentation, can be fermented as plug flow while producing biogas, wherein the reactor container (2) has at least one container inlet (10), via which the substrate to be fermented can be fed to the reactor interior (9), and at least one container outlet (12) spac...