INNOVATIVE O3/O2 REACTIVE FLOTATION FOR OFFSET PRINTING AND NEWSPAPER /MAGAZINE DEINKING
In an effort to improve recycling processes,this study examined the potential of an innovative deinking process using a reactive ozone/oxygen gas mixture instead of air.The effect of ozone on deinking efficiency (brightness,ink removal and losses) and flotation rejects (quantity and quality) for two recovered paper furnishes (100％ offset print and 50％ newsprint/50％ magazine mixture) was evaluated. For both paper furnishes,with ozone,the froth production slightly decreased while ink removal was improved if suitable O3 concentrations were applied.These optimal O3 concentrations,varying according to the paper furnish,led to an improved selectivity for both paper furnishes (minimum gain of 40％).As additional positive effect,optical brighteners were partially degraded by O3 improving the food contact ability of the deinked pulp.Moreover,the chemical oxygen demand of the effluents recovered from the floated pulp and from the froth was significantly reduced. For both paper furnishes,with or without ozone in the flotation cell,ink removal followed a first order kinetic.The comparison of the kinetic rates and of residual ink concentrations confirmed that addition of ozone slightly increased ink removal,especially with the more inked paper furnish. From this study,it could conclude that the reactive flotation with ozone appears as a promising deinking process to remove ink particles with environmental friendly rejects.
ozone deinking flotation recovered cellulosic fibres
Nathalie Marlin Filipe Almeida DavideBeneventi Marc Aurousseau
Grenoble INP-Pagora/LGP2,UMR 5518,461 rue de la Papeterie -BP65- 38402 Saint Martin dHeres Cedex.
国际会议
16th International Symposium on Wood,Fiber and Pulping Chemistry(第十六届木材、纤维及制浆化学国际会议)
天津
英文
1406-1410
2011-06-08（万方平台首次上网日期，不代表论文的发表时间）