ECH provided a complete wastewater treatment and reuse solution for a factory in Shanghai, including the design and construction of a dedicated on-site treatment station. The facility has a designed treatment capacity of 10 m³/day, processing approximately 2,004 tons of complex wastewater annually.

The wastewater mainly originates from nine primary sources, including reverse osmosis (RO) concentrate, solid-state battery production effluent, equipment cleaning wastewater, laboratory discharges, and other streams. This influent is highly complex, characterized by strong acidity (pH ~2.8) and high pollutant loads, including elevated concentrations of Chemical Oxygen Demand (COD), Total Nitrogen (TN), Total Phosphorus (TP), and zinc.

After treatment, the advanced treatment process ensures the final effluent consistently complies with the stringent Grade III standards of the Shanghai Integrated Wastewater Discharge Standard (DB 31/199-2018). The treated water is safely discharged to the municipal sewer network or reclaimed for reuse, guaranteeing regulatory compliance and promoting sustainable water resource recovery.