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| Synergistic Promoting Effect of Precipitated Calcium Carbonate and Fiber on Dewatering of Simulated Papermaking Sludge |
| Received:May 18, 2022 |
| DOI：10.11981/j.issn.1000-6842.2023.02.104 |
| Key Words:papermaking sludge;sludge dewatering;precipitated calcium carbonate;fiber;dewatering mechanism |
| Fund Project:齐鲁工业大学制浆造纸科学与技术教育部重点实验室（KF201813）。 |
| Author Name | Affiliation | Postcode | | HU Xin* | Tianjin Key Lab of Pulp & Paper， Tianjin University of Science & Technology， Tianjin， 300457 | 300457 | | ZHANG Hongjie | China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102 | 100102 | | SHEN Yuehao | Tianjin Key Lab of Pulp & Paper， Tianjin University of Science & Technology， Tianjin， 300457 | 300457 | | XIA Jie | Tianjin Key Lab of Pulp & Paper， Tianjin University of Science & Technology， Tianjin， 300457 | 300457 | | LI Yao | Tianjin Key Lab of Pulp & Paper， Tianjin University of Science & Technology， Tianjin， 300457 | 300457 | | ZHANG Wenhui | Tianjin Key Lab of Pulp & Paper， Tianjin University of Science & Technology， Tianjin， 300457 | 300457 |
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| Abstract: |
| Fiber and filler， the characteristic components of simulated papermaking primary sludge （hereinafter referred to as sludge）， were selected as the research objects to investigate the reaction mechanism of precipitated calcium carbonate （PCC） and fiber in dewatering process of the sludge. The results showed that fiber/PCC had synergistic effect in promoting dewatering， the moisture content， effective moisture content， sludge specific resistance， and compressibility of the sludge after adding fiber/PCC decreased， while the net sludge solid yield （YN） increased， compared with adding PCC or fiber alone. Further comparative analysis of Zeta potential， sludge floc size （especially D43）， and floc binding demonstrated that fiber/PCC formed flocs with larger size and stronger rigid structure through Ca2+ bridging， achieving synergic promoting effect on sludge dewatering. |
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