ALEXANDRIA, Va., July 16 -- United States Patent no. 12,668,552, issued on June 30, was assigned to Inst. Of Environ. & Sustain. Dev. in Agric. CAAS (Beijing).

"Continuous membrane-covered aerobic fermentation system and its application method" was invented by Jianfei Zeng (Beijing), Hongmin Dong (Beijing), Xiuping Tao (Beijing), Bin Shang (Beijing) and Zhiping Zhu (Beijing).

According to the abstract* released by the U.S. Patent & Trademark Office: "A continuous membrane-covered aerobic fermentation system and an application method thereof are disclosed. The system comprises: a fermentation trough which is formed by underground walls of trough, above-ground walls of trough, and a trough bottom; a membrane changing machine configured for ...