Biodegradation Behavior of Starch in Simulated White Water System of Old Corrugated Cardboard Pulping Process  

作　　者：Jinhuan Guo Liqin Liu Xiaohong Zhang Zhengbai Cheng Shuangxi Nie Haibing Cao Na Li Md Manik Mian Xingye An Hongbin Liu 

机构地区：[1]Tianjin Key Laboratory of Pulp and Paper,State Key Laboratory of Biobased Fiber Manufacturing Technology,State Key Laboratory of Biobased Fiber Manufacturing Technology,Tianjin University of Science and Technology,Tianjin,300457,China [2]Zhejiang Jingxing Paper Co.,Ltd.,Pinghu,Zhejiang Province,314214,China [3]Guangxi Key Laboratory of Clean Pulp&Papermaking and Pollution Control,College of Light Industry and Food Engineering,Guangxi University,Nanning,Guangxi Zhuang Autonomous Region,530004,China [4]Limerick Pulp and Paper Centre,University of New Brunswick,Fredericton,New Brunswick,E3B 5A3,Canada [5]Liaoning Province Key Laboratory of Pulp and Papermaking Engineering,Dalian Polytechnic University,Dalian,Liaoning Province,116034,China

出　　处：《Paper And Biomaterials》2023年第1期50-62,共13页造纸与生物质材料（英文）

基　　金：financial support from the China Postdoctoral Science Foundation (No. 2022M712379, No. 2021M692401);National Natural Science Foundation of China (No. 32101470);Foundation (No. 2021KF37) of Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control,College of Light Industry and Food Engineering, Guangxi University;Foundation of Tianjin Key Laboratory of Pulp & Paper of Tianjin University of Science & Technology (No. 202003, No. 202106);Research Foundation from the University of New Brunswick;Post-Doctoral Fellow Programs from Zhejiang Jingxing Paper Co., Ltd

摘　　要：Considering the serious barriers/issues induced by the accumulated starch generated in white water system of old corrugated cardboard(OCC)pulping process,large amounts of accumulated starch in white water would be decomposed by microorganisms and could not be utilized,thereby resulting in severe resource wastage and environmental pollution.This study mainly explored the effects of biodegradation/hydrolysis conditions of the two types of starch substrates(native starch and enzymatically(α-amylase)hydrolyzed starch),which were treated via microorganism degradation within the simulated white water from OCC pulping system and their biodegradation products on the key properties were characterized via X-ray diffraction(XRD),Fourier-transform infrared spectroscopy(FT-IR),and gel permeation chromatography(GPC)technologies.The effects of system temperature,pH value,starch concentration,and biodegradation time on starch biodegradation ratio and the characteristics of obtained biodegradated products from the two types of starches were studied.In addition,the effect ofα-amylase dosage on the biodegradation ratio of enzymatically hydrolyzed starch and its properties was investigated.It was found that the native starch presented a maximal degradation ratio at a system temperature of 55℃and pH value range of 5-7,respectively,the corresponding starch concentration within simulated white water system was 200 mg/L.Whereas the enzymatically hydrolyzed starch exhibited a highest degradation ratio at a system temperature of 50℃and pH value of 5.5,respectively,and the corresponding starch concentration within simulated white water system was 100 mg/L.It was verified that native starch is more readily bio-hydrolyzed and biodegradation-susceptive by microorganisms in simulated white water system of OCC pulping process,while the enzymatically hydrolyzed starch exhibits better biodegradation/hydrolysis resistance to the microbial degradation than that of native starch.This study provides a practical and interesting approach to inves

关 键 词：STARCH OCC pulping white water simulation hydrolysis resistance biodegradation behavior 

分 类 号：TS74[轻工技术与工程—制浆造纸工程]