The design scale of the sewage treatment plant where this project is located is 30,000t/d mixed wastewater +450t/d nickel-containing wastewater containing five types of heavy metals under provincial control; it is constructed in three phases, with a phase of 10,000t/d mixed wastewater (30,000t/d civil engineering works) +300t/d nickel-containing wastewater containing five types of heavy metals under provincial control; the mixed wastewater will reach the discharge standard of Jialu River Basin of Zhengzhou City and the tailwater will be discharged to Lianhe River; the nickel-containing wastewater will realize zero-discharge and reach the standard of production requirements of enterprises in the park and be reused; all sludge and residual liquid will be treated as hazardous waste. The mixed wastewater is treated to meet the discharge standard of Jalu River Basin in Zhengzhou City, and the tail water is discharged to Lianhe River; the wastewater containing nickel and other province-controlled five heavy metal wastewater realizes zero discharge, and is treated to meet the standard of production requirements of the enterprises in the park and is reused; the sludge, residual liquid, etc., are all handled according to the hazardous waste.

System process