Summary description： The domestic sewage treatment project of Mingtai Industrial Park in Sanhe City, Langfang City, uses the pwt-a-50 intelligent assembly type integrated sewage treatment equipment independently developed by Huayu brilliant to comprehensively treat the domestic sewage in the park, and the effluent meets the class I a emission limit specified in the discharge standard of pollutants for municipal wastewater treatment plants (GB18918-2002), so as to solve the problem of direct discharge of domestic sewage in the park.