Abstract 1. A PROCESS FOR PURIFYING A LIQUID AQUEOUS WASTE CONTAINING SUSPENDED PARTICLES AND DISSOLVED SOLIDS AND IMPURITIES HAVING A BIOCHEMICAL OXYGEN DEMAND AND CHEMICAL OXYGEN DEMAND COMPRISING THE SEQUENTIAL STEPS OF ADDING A FIRST CHARGE-DENSITY REDUCING AGENT, FERRIC CHLORIDE, TO THE LIQUID WASTE IN AN AMOUNT SUFFICIENT TO REDUCE THE CHARGE-DENSITH OF PARTICLES CONTAINED THEREIN TO ABOUT -6 MV. TO ABOUT 0 MV.; ADDING A SECOND CHARGE-DENSITY REDUCING AGENT, LIME, TO THE LIQUID WASTE IN AN AMOUNT SUFFICIENT TO IMPART THERETO A CHARGE-DENSITY OF ABOUT -2 MV. TO ABOUT +5 MV. AND THEREBY EFFECT FLUOCCULATION OF PARTICLES THEREIN; AND SEPARATING THE FLOCCULATED PARTICLES FROM THE LIQUID WASTE THEREBY REMOVING IMPURITIES FROM THE LIQUID WASTE; WHEREIN PRIOR TO THE ADDITION OF SAID LIME TO SAID WASTE, SUFFICIENT TIME IS ALLOWED TO PASS FOR PARTICLES IN SAID WASTE TO COAGULATE INTO DENSER PARRICLES THROUGH THE ACTION OF SAID FERRIC CHLORIDE, AND WHEREIN SUBSTANTIALLY ALL OF THE PARTICLES IN TH WASTE ARE SUSPENDED IN SAID WASTE WHEN SAID LIME IS ADDED THERETO, AND WHEREIN SAID WASTE CONTAINING SAID FERRIC CHLORIDE AND PRIOR TO THE ADDITION THERETO OF SAID LIME IS ACIDIC.
A PROCESS FOR PURIFYING A LIQUID AQUEOUS WASTE CONTAINING SUSPENDED PARTICLES AND DISSOLVED SOLIDS AND IMPURITIES HAVING A BIOCHEMICAL OXYGEN DEMAND AND CHEMICAL OXYGEN DEMAND COMPRISING THE SEQUENTIAL STEPS OF ADDING A FIRST CHARGE-DENSITY REDUCING AGENT, FERRIC CHLORIDE, TO THE LIQUID WASTE IN AN AMOUNT SUFFICIENT TO REDUCE THE CHARGE-DENSITH OF PARTICLES CONTAINED THEREIN TO ABOUT -6 MV. TO ABOUT 0 MV.; ADDING A SECOND CHARGE-DENSITY REDUCING AGENT, LIME, TO THE LIQUID WASTE IN AN AMOUNT SUFFICIENT TO IMPART THERETO A CHARGE-DENSITY OF ABOUT -2 MV. TO ABOUT +5 MV. AND THEREBY EFFECT FLUOCCULATION OF PARTICLES THEREIN; AND
Claim 2
Dependent Claim
98 words
A PROCESS FOR PURIFYING A LIQUID AQUEOUS WASTE CONTAINING SUSPENDED PARTICLES AND DISSOLVED SOLIDS AND IMPURITIES HAVING A BIOCHEMICAL OXYGEN DEMAND AND CHEMICAL OXYGEN DEMAND COMPRISING THE SEQUENTIAL STEPS OF ADDING A FIRST CHARGE-DENSITY REDUCING AGENT, FERRIC CHLORIDE, TO THE LIQUID WASTE IN AN AMOUNT SUFFICIENT TO REDUCE THE CHARGE-DENSITH OF PARTICLES CONTAINED THEREIN TO ABOUT -6 MV. TO ABOUT 0 MV.; ADDING A SECOND CHARGE-DENSITY REDUCING AGENT, LIME, TO THE LIQUID WASTE IN AN AMOUNT SUFFICIENT TO IMPART THERETO A CHARGE-DENSITY OF ABOUT -2 MV. TO ABOUT +5 MV. AND THEREBY EFFECT FLUOCCULATION OF PARTICLES THEREIN; AND