Hydrolysis trends and achieved yields are shown in Fig. 1. The
biggest experimental yield was achieved for cardboard
24.4 ± 1.3%, the second biggest yield for recycled paper was
23.0 ± 0.2%. By comparing the yields for the two variants of recycled
papers, (the variants of the same type of paper, however one
variant was clean, while approximately 10% of the surface of the
other one was inked) it is possible to get a picture of the effect of
printer dyes on the enzymes activity. Printing dyes together with
adhesives are the most common type of pollutants of the waste paper.
Yields of 23.0 ± 0.2% and 20.9 ± 1.8% have been achieved for
unprinted recycled paper and inked variant, respectively.
Enzymatic hydrolysis yields were generally too low for industrial
production, this can be attributed to the low enzyme concentration
used (2.0 + 0.2% w/w on TS). Yields could be increased
according to the literature (Haghighi Mood et al., 2013; Sun
et al., 2002) with various pretreatment methods. Since the highest
experimental yields were achieved with cardboard and recycled
paper, these are probably the most promising materials among
the tested waste papers.
Hydrolysis trends and achieved yields are shown in Fig. 1. Thebiggest experimental yield was achieved for cardboard24.4 ± 1.3%, the second biggest yield for recycled paper was23.0 ± 0.2%. By comparing the yields for the two variants of recycledpapers, (the variants of the same type of paper, however onevariant was clean, while approximately 10% of the surface of theother one was inked) it is possible to get a picture of the effect ofprinter dyes on the enzymes activity. Printing dyes together withadhesives are the most common type of pollutants of the waste paper.Yields of 23.0 ± 0.2% and 20.9 ± 1.8% have been achieved forunprinted recycled paper and inked variant, respectively.Enzymatic hydrolysis yields were generally too low for industrialproduction, this can be attributed to the low enzyme concentrationused (2.0 + 0.2% w/w on TS). Yields could be increasedaccording to the literature (Haghighi Mood et al., 2013; Sunet al., 2002) with various pretreatment methods. Since the highestexperimental yields were achieved with cardboard and recycledpaper, these are probably the most promising materials amongthe tested waste papers.
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