73774908
Mar 10, 1989
May 1, 1990
PURIFICATION UNITS FOR WASTE WATER CONTAMINATED WITH OIL AND HEAVY METAL BY MEANS OF FLOTATION AND INITIAL COAGULATION AND RECOVERY UNITS FOR AQUEOUS ALKALINE SOLUTIONS BY MEANS OF FLOTATION AND COAGULATION WITH RECOVERY OF FREE TENSIDES BY ULTRAFILTRATION
Environmental Control Apparatus