US Patent Issued to Kubota on July 21 for "Wastewater treatment method" (Japanese Inventors)

ALEXANDRIA, Va., July 21 -- United States Patent no. 12,685,968, issued on July 21, was assigned to Kubota Corp. (Osaka, Japan).

"Wastewater treatment method" was invented by Yasunobu Okajima (Amagasaki, Japan), Yukako Ishihara (Amagasaki, Japan) and Ken Tanaka (Amagasaki, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "While productivity in generation of treated water is improved, a membrane cleaning effect through relaxation is sufficiently exerted. While aeration is carried out with respect to at least one membrane cartridge (18), a cycle of a filtration operation and a filtration stoppage operation is repeated. A gas vent valve (62) connected to a gas retention chamber (52) is used, and the gas vent...