ALKALINE PEROXIDE BLEACHING OF HOT WATER TREATED WHEAT STRAW
The aim of this study was to evaluate the possibilities for chemical consumption reduction in P-P-Paa-P bleaching (P alkaline peroxide stage, Paa peracetic stage) of hot water treated straw and the effect of the wheat straw variability on the process. Papermaking fibre production from wheat straw us...
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| Format: | Article |
| Language: | English |
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North Carolina State University
2010-05-01
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| Series: | BioResources |
| Subjects: | |
| Online Access: | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/viewFile/BioRes_05_2_0808_Mustajoki_LD_Alk_H2O2_Bleach_HotWater_Wheat_Straw/561 |
| _version_ | 1818539609255051264 |
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| author | Suvi Mustajoki Anja Leponiemi Olli Dahl |
| author_facet | Suvi Mustajoki Anja Leponiemi Olli Dahl |
| author_sort | Suvi Mustajoki |
| collection | DOAJ |
| description | The aim of this study was to evaluate the possibilities for chemical consumption reduction in P-P-Paa-P bleaching (P alkaline peroxide stage, Paa peracetic stage) of hot water treated straw and the effect of the wheat straw variability on the process. Papermaking fibre production from wheat straw using such a process could be implemented on a small scale if chemical consumption was low enough to eliminate the need for chemical recovery. The pulp properties obtained with this process are equal to or even superior to the properties of wheat straw soda pulp. The possibility of enhancing the first peroxide stage with oxygen and pressure was studied. The possibility for substitution of sodium hydroxide partially with sodium carbonate was also investigated. The objective was to achieve International Standardization Organization (ISO) brightness of 75%, with minimal sodium hydroxide consumption, whilst maintaining the pulp properties. The optimization of the peroxide bleaching is challenging if the final brightness target cannot be reduced. Results indicate that up to 25% of the sodium hydroxide could be substituted with sodium carbonate without losing brightness or affecting pulp properties. Another possibility is a mild alkali treatment between the hot water treatment and the bleaching sequence. |
| first_indexed | 2024-12-11T21:44:20Z |
| format | Article |
| id | doaj.art-086bcfb78ed74be59ed26415ec2a65d1 |
| institution | Directory Open Access Journal |
| issn | 1930-2126 |
| language | English |
| last_indexed | 2024-12-11T21:44:20Z |
| publishDate | 2010-05-01 |
| publisher | North Carolina State University |
| record_format | Article |
| series | BioResources |
| spelling | doaj.art-086bcfb78ed74be59ed26415ec2a65d12022-12-22T00:49:42ZengNorth Carolina State UniversityBioResources1930-21262010-05-0152808826ALKALINE PEROXIDE BLEACHING OF HOT WATER TREATED WHEAT STRAWSuvi MustajokiAnja LeponiemiOlli DahlThe aim of this study was to evaluate the possibilities for chemical consumption reduction in P-P-Paa-P bleaching (P alkaline peroxide stage, Paa peracetic stage) of hot water treated straw and the effect of the wheat straw variability on the process. Papermaking fibre production from wheat straw using such a process could be implemented on a small scale if chemical consumption was low enough to eliminate the need for chemical recovery. The pulp properties obtained with this process are equal to or even superior to the properties of wheat straw soda pulp. The possibility of enhancing the first peroxide stage with oxygen and pressure was studied. The possibility for substitution of sodium hydroxide partially with sodium carbonate was also investigated. The objective was to achieve International Standardization Organization (ISO) brightness of 75%, with minimal sodium hydroxide consumption, whilst maintaining the pulp properties. The optimization of the peroxide bleaching is challenging if the final brightness target cannot be reduced. Results indicate that up to 25% of the sodium hydroxide could be substituted with sodium carbonate without losing brightness or affecting pulp properties. Another possibility is a mild alkali treatment between the hot water treatment and the bleaching sequence.http://ojs.cnr.ncsu.edu/index.php/BioRes/article/viewFile/BioRes_05_2_0808_Mustajoki_LD_Alk_H2O2_Bleach_HotWater_Wheat_Straw/561Non-wood fibreWheat strawBiorefineryHot water treatmentBleachabilityPulp properties |
| spellingShingle | Suvi Mustajoki Anja Leponiemi Olli Dahl ALKALINE PEROXIDE BLEACHING OF HOT WATER TREATED WHEAT STRAW BioResources Non-wood fibre Wheat straw Biorefinery Hot water treatment Bleachability Pulp properties |
| title | ALKALINE PEROXIDE BLEACHING OF HOT WATER TREATED WHEAT STRAW |
| title_full | ALKALINE PEROXIDE BLEACHING OF HOT WATER TREATED WHEAT STRAW |
| title_fullStr | ALKALINE PEROXIDE BLEACHING OF HOT WATER TREATED WHEAT STRAW |
| title_full_unstemmed | ALKALINE PEROXIDE BLEACHING OF HOT WATER TREATED WHEAT STRAW |
| title_short | ALKALINE PEROXIDE BLEACHING OF HOT WATER TREATED WHEAT STRAW |
| title_sort | alkaline peroxide bleaching of hot water treated wheat straw |
| topic | Non-wood fibre Wheat straw Biorefinery Hot water treatment Bleachability Pulp properties |
| url | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/viewFile/BioRes_05_2_0808_Mustajoki_LD_Alk_H2O2_Bleach_HotWater_Wheat_Straw/561 |
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