Located in Liaoning Province, Hangjin Technology is an established chemical company, mainly
producing basic chemical products such as polyether, caustic soda, and propylene oxide. The
wastewater treatment capacity of the enterprise sewage station is 36,000 tons/day, and the
concentration of chloride ions in the wastewater reaches 20,000mg/L. In the biochemical process
section, biological ropes are used to attach salt-tolerant bacteria to increase the sludge concentration,
and finally meet the discharge standard.