Investigate the effect of anionic trash management through removal and neutralization of dissolved and colloidal substances (DCS) On properties of CMP pulp and paper | ||
| تحقیقات علوم چوب و کاغذ ایران | ||
| Article 2, Volume 33, Issue 3 - Serial Number 64, September 2018, Pages 323-336 PDF (261.14 K) | ||
| Document Type: Research Paper | ||
| DOI: 10.22092/ijwpr.2018.106563.1347 | ||
| Authors | ||
| Moghadaseh Akbari* 1; Hossein Resalati2; Ahmad reza Saraeyan3; Mohammad reza Dehghani Firoz Abadi3 | ||
| 1Candidate of Pulp and Paper Industries, Faculty of Wood and Paper Engineering, Gorgan, Iran | ||
| 2Professor of pulp and Paper Technology, Faculty of Wood and Paper Engineering Sari University of Agricultural Sciences and Natural Resources, Sari, Iran | ||
| 3Associated Professor of Pulp and Paper Technology, Faculty of Wood and Paper Engineering, Gorgan, Iran | ||
| Abstract | ||
| During the paper manufacturing process, especially when mechanical pulp or recycled pulp used, a large amount of soluble and colloidal substances (DCS) are comprised and dispersed or dissolved in the process water. Accumulation of DCS during the papermaking operation with the increasing closure process water systems, can have a variety of deleterious effects on papermaking process and paper products. In this study, The effect of anionic trash neutraliziation was investigated by using different catcher anionic tarsh and also pulp washing (removal of anionic trash) on the CMP pulp and paper properties. After the initial preparation chemi-mechanical pulp (CMP), bleached long fiber kraft pulp and mixing the pulps with each other, filler of precipitated calcium carbonate (PCC) was added. Then a cationic retention aid That in this research has been cationic polyacrylamide were added to the mix. To neutralization of and reduce the negative effects of anionic trash, different levels of poly DADMAC with molecular weight 100000-200000 (0.025, 0.05, 0.1, 0.15%) and poly aluminium chloride (PAC) (0.1, 0.25, 0.5%) was added before adding of retention aid. Results showed that the use of different neutralizers imprived of zeta potential and drainage time of pulp, and increase of total retention; but reduces burst index of paper that was not significant statistically. CMP pulp washing and drainage treatment caused reducing COD and on the other hand reduced the amount of anionic trash with organic origin. Washing treatment pulp improved drainage time from pulp, total retention; but reduced burst index. Based on these findings, using cationic polyelectrolyte can introduce as a good strategy to reduce the harmful effects anionic trash and more retention suspension components. | ||
| Keywords | ||
| Soluble and colloidal substances (DCS); anionic trash catcher; CMP pulp; cationic polyelectrolyte | ||
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