Potential of enzymatic deinking

Laccase-Mediator Biobleaching Applied to a Direct Yellow Dyed Paper

“…The use of biotechnology in the pulp and paper industry, especially for recycling applications, is now a well‐established process. The use of cellulases to deink newspaper (1) is a commercially accepted practice, and the use of amylase for deinking xerographic office waste paper is nearing routine commercial applications (2).…”

Bio-deinking of mixed office waste paper by Penicillium citrinum NCIM-1398 and its comparative study with conventional chemical deinking

“…By contrast, due to the use of lesser amount of chemicals in enzymatic and chemi-enzymatic deinking as compared to conventional chemical deinking, the COD value of effluent of enzymatic deinking was found to be lower in comparison of chemical deinking. For the proper control of BOD levels, more precise control over enzyme doses and retention time are required to minimize cellulose hydrolysis (Qin et al 2000;Magnin et al 2002;Verma et al 2011).…”

“…Marchildon et al (1989) in their study stated that an optimum combination of deinking chemicals and pulping temperature facilitated the formation of big flocks of ink. Magnin et al (2002) mentioned that de-inkability was affected by temperature above 65 C and there would be reversal of ink dissociation back into the system. High pH favours cellulose fiber swelling, which reduces the ink adhesion to fiber (Goovaerts et al 2002).…”

Deinking with Enzymes

“…Effective residual ink concentrations have been reduced by 35% in ONP/OMG (old magazine) mills using enzymatic deinking. Magnin et al (2001) conducted pilot-scale trials to compare enzymatic deinking with conventional alkaline deinking on typical wood-containing and wood-free paper compositions. There are also optical benefits of cleaner pulp for tissue and towel production.…”