OCC制浆过程中抑制二次淀粉降解的研究

Inhibition Study of Secondary Starch Degradation During OCC Pulping Process

关键词:  OCC  二次淀粉  水解  淀粉酶抑制剂  杀菌剂

Key Words:OCC  secondary starch  hydrolysis  amylase inhibitor  fungicide

摘要:研究了4种金属离子（Cu²⁺、Zn²⁺、Mn²⁺、Li⁺）对二次淀粉降解的抑制效果及其最佳添加量，并利用杀菌剂与其协同处理，探究OCC制浆过程中二次淀粉降解的抑制问题。结果表明，Cu²⁺具有最佳的抑制效果。当反应时间4 h、Cu²⁺添加量为0.20 mol/t时，原淀粉几乎不降解；当反应时间4 h、Cu²⁺添加量为0.024 mol/t时，酶解淀粉的降解率最低，为15.4%；当杀菌剂与Cu²⁺协同作用时，相比单独添加杀菌剂，原淀粉4 h抑制效果提升58.0%，酶解淀粉4 h抑制效果提升31.2%。

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%.