| abstract |
WASTE EFFUENT LIQUID FROM A PAPER MILL IS INTIMATELY MIXED WITH A WATER SLURRY OF LIME AND A WATER SLURRY OF LIME MUD, COMPOSED PRINCIPALLY OF CALCIUM CARBONATE, UNDER ALKALINE CONDITIONS, THE RESULTING MIXTURE BEING SUBJECTED TO CLARIFICATION SEPARATION OF FORMED PRECIPITANTS, FOLLOWING WHICH, THE LIQUID EFFUENT OVERFLOW IS CARBONATE BY THEBUBBLLING OF CARBON DIOXIDE GAS THERETHROUGH TO PRECIPITATE CALCIUM CARBONATE AND RESIDUAL COLOR-IMPARTING ENTITIES AND TO EFFECT ADJUSTMENT OF THE PH TO APPROXIMATELY NEUTRAL CONDITIONS WHEREBY THE RESULTANT LIWUID IS ADAPTED FOR DISCHARGE. |