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Inhibition Study of Secondary Starch Degradation During OCC Pulping Process |
Received:October 27, 2022 |
DOI:10.11980/j.issn.0254-508X.2023.04.004 |
Key Words:OCC secondary starch hydrolysis amylase inhibitor fungicide |
Fund Project:国家自然科学基金(32101470);中国博士后科学基金(2022M712379;2021M692401);浙江景兴纸业股份有限公司校企合作项目。 |
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Abstract:The inhibitory effects of four metal ions (Cu2+, Zn2+, Mn2+, and Li+) on the degradation of secondary starch and their optimum addition amount were studied. The synergistic treatment with fungicides was applied to explore the inhibition issue of secondary starch degradation in the OCC pulping process. The results showed that Cu2+ had the bettter inhibitory effect. When the reaction time was 4 h and the addition amount of Cu2+ was 0.20 mol/t, the native starch was hardly degraded. When the reaction time was 4 h and the addition amount of Cu2+ was 0.024 mol/t, the enzymatic hydrolyzed starch degradation rate of 15.4% was lowest . When the fungicide and Cu2+ synergistically acted 4 h, compared with the fungicide adding separately, the inhibition effect of native starch was increased by 58.0%, the inhibition effect of enzymatic hydrolyzed starch was increased by 31.2%. |
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