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在苯胺印刷和胶版印刷报纸的脱墨过程中,比较了中性酶促脱墨技术与传统碱性脱墨技术。与传统碱性脱墨技术相比,酶促脱墨技术能够明显降低纸浆的尘埃度(可降低15%～80%,取决于所测试的报纸),同时使胶版和苯胺印刷报纸脱墨过程中生产用水的COD负荷分别降低了20%和50%。另外,采用中性酶促脱墨技术时,胶版印刷报纸的油墨去除率较低,白度损失2～6个百分点;而苯胺印刷报纸的质量参数得到了明显提高,油墨去除率增加20个百分点,滤液暗化值(ΔY值)和COD都降低,且采用改性苯胺水基油墨印刷的报纸的白度可增加5个百分点。酶处理后浆料的技术性能基本不变或稍有提高。
During deinking of flexographic and flexographic newspapers, neutral enzymatic deinking and traditional alkaline deinking were compared. Compared to traditional alkaline deinking, enzymatic deinking can significantly reduce pulp dust (can be reduced by 15% to 80%, depending on the newspaper being tested) while deinking the flexographic and flexographic newspapers The COD load of production water is reduced by 20% and 50% respectively. In addition, the use of neutral enzymatic deinking technology, offset printing newspaper ink removal rate is low, whiteness loss of 2 to 6 percentage points; and flexographic printing quality parameters of the newspaper has been significantly improved, the ink removal rate increased by 20 percentage points , The darkening value (ΔY value) and COD of the filtrate decreased, and the whiteness of newspapers printed with modified aniline water-based ink could be increased by 5%. The technical performance of the slurry after the enzyme treatment remained unchanged or slightly improved.