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Study on Removal Characteristics of Non-fiber Components of Pulp in MOW Reuse Treatment Process
Received:May 03, 2024  
DOI：10.11980/j.issn.0254-508X.2024.06.016
Key Words:mixed office waste paper  pulp  non-fiber component  removal characteristic
Fund Project:国家重点研发计划（No.2022YFC2105504）。
Author NameAffiliationPostcode
SUN Yanfen College of Light Industry and Food Engineering， Guangxi Key Lab of Clean Pulping & Papermaking and Pollution Control， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004 530004
YUAN Juan College of Light Industry and Food Engineering， Guangxi Key Lab of Clean Pulping & Papermaking and Pollution Control， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004 530004
SUN Xiaoping College of Light Industry and Food Engineering， Guangxi Key Lab of Clean Pulping & Papermaking and Pollution Control， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004 530004
WANG Mengyang College of Light Industry and Food Engineering， Guangxi Key Lab of Clean Pulping & Papermaking and Pollution Control， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004 530004
CHEN Zhuo College of Light Industry and Food Engineering， Guangxi Key Lab of Clean Pulping & Papermaking and Pollution Control， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004 530004
CHEN Zhiwei College of Light Industry and Food Engineering， Guangxi Key Lab of Clean Pulping & Papermaking and Pollution Control， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004 530004
LUO Lianxin* College of Light Industry and Food Engineering， Guangxi Key Lab of Clean Pulping & Papermaking and Pollution Control， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004 530004
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Abstract:This study simulated the alkaline pulping process of mixed office waste paper （MOW） and explored the removal characteristics of non-fiber components of pulp in the various stages of reuse treatment as “pulping-flotation-washing-bleaching”. The results showed that in the pulping process， the removal rates of ash and starch were 71.5% and 59.5%， respectively. At this time， the removal rates of ink， dissolved and colloidal substances （DCS）， and Ca2+ were relatively low， at 29.4%， 18.4%， and 28.8%， respectively. In the flotation process， the removal rates of ink and Ca2+ were increased by 53.5 and 31.2 percentage points， while the removal efficiency of other non-fiber components was average. In the washing process， the removal characteristics of starch and DCS were obvious， with removal rates increased by 9.6 percentage points and 9.4 percentage points， respectively. In the bleaching process， the removal effect of non-fiber components of pulp was less affected by the bleaching conditions. In summary， the contents of ink， ash， starch， and Ca2+ in the pulp were significantly reduced after MOW reuse treatment process， but there were still varying degrees of retention in the pulp.
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