welcome to sf international associates, Inc. representing leading manufacturers of water and wastewater treatment equipment for over 18 years aeration biosolids stabilization chemical metering pumps clarifiers sludge thickeners polymer dosing belt Filter press dewatering digesters trickling filters rotary distributors disinfection chlorination uv filtration fine Screens grinders septage process equipment package water wastewater plants industrial gas southeast asia south pacific saudi arabia jordan egypt oman kuwait qatar united aab emirates abu dhabi dubai sharjah bahrain thailand singapore philippines guam south america westech engineering aeration wastewater slow speed surface aerator brush water cascading induced forced draft chain flight replacement drives rim drive spiral rake solids contact suction header pipe digester equipment steel cover heating systems exchangers tube boiler heat exchanger combination mixing extreme duty mechanical sludge mixers gas lance dissolved air flotation thickeners thickener filters continuous backwash granular media hyperbaric