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

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

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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(a-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 of α-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 investigate the starch hydrolysis or biodegradation behaviors in white water system of OCC pulping process,which would greatly contribute to the full recycling and valorized application of starch as a versatile additive during paperboard production.

starchOCC pulpingwhite watersimulationhydrolysis resistancebiodegradation behavior

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

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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

Limerick Pulp and Paper Centre,University of New Brunswick,Fredericton,New Brunswick,E3B 5A3,Canada

Zhejiang Jingxing Paper Co.,Ltd.,Pinghu,Zhejiang Province,314214,China

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

Liaoning Province Key Laboratory of Pulp and Papermaking Engineering,Dalian Polytechnic University,Dalian,Liaoning Province,116034,China

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China Postdoctoral Science FoundationChina Postdoctoral Science FoundationNational Natural Science Foundation of ChinaGuangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control,College of Light Industry and Food Engineering,Guangxi Foundation of Tianjin Key Laboratory of Pulp & Paper of Tianjin University of Science & TechnologyFoundation of Tianjin Key Laboratory of Pulp & Paper of Tianjin University of Science & Technology

2022M7123792021M692401321014702021KF37202003202106

2023

10.26599/PBM.2023.9260005

造纸与生物质材料(英文)
中国造纸学会　中国制浆造纸研究院

造纸与生物质材料(英文)

CHSSCD
影响因子：0.082
ISSN：2096-2355
年,卷(期)：2023.8(1)
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