Usoro ọgwụgwọ nsị nke obodo Beijing Fengtai resettlement bụ onye na-ahụ maka Henan Datang Shengshi Construction Engineering Co., Ltd. Datang Shengshi nwere ahụmahụ ubi bara ụba na ọkachamara n'ịwulite usoro ọdụ ụgbọ mmiri nke obodo.Usoro ọgwụgwọ nsị na-eji mita ikuku oxygen gbasasịa nke ụlọ ọrụ anyị, mita sludge na ultrasonic larịị mita na ngwá ọrụ ndị ọzọ maka nyochaa ọkwa mmiri na àgwà mmiri nke usoro ọgwụgwọ mmiri.
