... be polluted, thus the chemical cleaning is required. QX-711 is an alkali detergent designed for removal of oil, ... chemicals mix well. 6. Can be used repeatedly. QX-711 is an alkali liquid formula; it can remove oil, organic ... effluence to water box. (3)Input q.v. QX-711 to water box; mix the solution with water pump, ... After pH rise to 4, input q.v. QX-711 or acid, till pH not rise, meaning cleaning is ...