Established in 1918, a time-honored Chinese enterprise. Located in the Guoxian Economic Development Zone, Beijing's Tongzhou District, it specializes in producing six major product lines, including "Xian Yuan" brand soy sauce, preserved bean curd, soy sauce, rice vinegar, cooking wine powder, and silk. In the millennium year, the company's "Black Robber" products were exported overseas, gaining recognition for their quality and service.

"Xian Yuan Black" is a hit in Japan, establishing itself as a Chinese production and processing base for Japanese soy sauce; "Xian Yuan Yellow Sauce" is the company's flagship product, used in Beijing's famous Zhajiangmian restaurants, hailed as the "Number One Sauce" in the Northeast market, and has been exporting to Europe, the U.S., and Canada since 2003, with great reviews; "Xian Yuan Fermented Bean Curd," one of the state's three treasures, was a product of the 11th Asian Games; in 2005, "Xian Yuan Vermicelli" passed the QS certification of the Chinese Vermicelli industry.

Wastewater Type: Domestic Wastewater

Treatment Scale: 150 m³/day

Process: Primary Sedimentation + Adjustment + Air Flotation + Anaerobic + Aerobic