A PROCESS FOR BIOENZYMATIC DEIKING OF PAPER

摘要

A PROCESS FOR BIOENZYMATIC DUNKING OF PAPER 5 THE PRESENT INVENTION RELATES TO A PROCESS FOR ENZYMATIC DEINKING OF PAPER COMPRISING COMBINATION OF ENZYMES WHEREIN THE SAID PROCESS COMPRISES SUBJECTING THE PAPER WITH PRINTED INK TO PULPING WITH AGITATION; ADDING THE PULP TO COMBINATION OF PLURALITY OF ENZYMES PRESENT AT A DEFINED RATIO; HYDROLYSIS OF THE PAPER PULP WITH THE SAID ENZYMES TO FORM A PULP SLURRY OF CONSISTENCY 3 TO 12%; SUBJECTING THE PULP SLURRY TO FLOATATION AT I 0 APPROPRIATE TEMPERATURE AND PH; PROVIDING AIR AND SURFACTANT LEADING TO INK REMOVAL; REMOVAL OF FLOATING INK FROM THE SURFACE; DRAINING OF THE CLEAN PULP. THE PRESENT INVENTION ALSO PROVIDES A SYSTEM FOR ENZYMATIC DEINKING OF PAPER WHEREIN THE SYSTEM COMPRISES ENZYME STORAGE TANK FOR STORING COMBINATION OF PLURALITY OF ENZYMES AT DEFINED RATIO; BIOREACTOR ADAPTED TO RECEIVE ENZYME FROM THE ENZYME STORAGE TANK FOR 1 5 ENZYMATIC PULP HYDROLYSIS OCCURRING AT DEFINED PH AND TEMPERATURE; FLOATATION VESSEL OPERATIVELY CONNECTED WITH THE SAID BIOREACTOR AND ADAPTED FOR FLOATATION OF THE HYDROLYSED PULP SLURRY AT APPROPRIATE TEMPERATURE AND PH FOR SPECIFIC PERIOD OF TIME AND REMOVAL OF INK FROM THE PULP; PULP SLURRY VESSEL COMPRISING TWO SET OF SIEVERS TO SEPARATE CLEAN PULP, RECEIVED FROM FLOATATION VESSEL, FROM ITS SLURRY. 20