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Starch Dissolution During OCC Pulping and Its Effect on Pulp Properties
Received:August 28, 2022  
DOI：DOI：10.11980/j.issn.0254-508X.2023.03.008
Key Words:OCC  starch  the ability of filtration  strength  amylase
Author NameAffiliationPostcode
WANG Hao* Tianjin Key Lab of Pulp and Paper， Tianjin University of Science and Technology， Tianjin， 300457 300457
LIU Chunlan Shandong Century Sunshine Paper Group Co.， Ltd.， Changle， Shandong Province， 262400 262400
FU Rundong Tianjin Key Lab of Pulp and Paper， Tianjin University of Science and Technology， Tianjin， 300457 300457
YU Menghui Tianjin Key Lab of Pulp and Paper， Tianjin University of Science and Technology， Tianjin， 300457 300457
WANG Gaosheng Tianjin Key Lab of Pulp and Paper， Tianjin University of Science and Technology， Tianjin， 300457 300457
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Abstract:In this paper， the changes of starch during OCC pulping and its effects on the ability of filtration and strength of OCC pulp were studied， and the effect of amylase treatment on the properties of OCC pulp was also discussed. The results showed that the content of starch in OCC was 10.6% （relative to the absolute dry material）， and 10%～20% starch was dissolved during the pulping process （including pulping and beating）. Removing dissolved starch by dewatering could improve the ability of filtration of OCC pulp and reduce the strength of OCC pulp. Amylase not only degraded the dissolveed starch， but also the starch attached to the fiber， resulting in a reduction of pulp yield and an increase of wastewater pollution load.
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