THE EFFECTS OF ALKALINE FILTRATE RECIRCULATION TOWARDS THE PROPERTIES OF LONG FIBER PULPS WITH OD(EPO)DED BLEACHING SEQUENCE
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| Format: | Artículo científico |
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Universidade Federal de Lavras
2018
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| _version_ | 1876474076528115712 |
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| author | Luciana Cerqueira Souza |
| author_facet | Luciana Cerqueira Souza |
| contents | THE EFFECTS OF ALKALINE FILTRATE RECIRCULATION TOWARDS THE PROPERTIES OF LONG FIBER PULPS WITH OD(EPO)DED BLEACHING SEQUENCE Luciana Cerqueira Souza Antonio Jose Vinha Zanuncio Jorge Luiz Colodette Agrociencias Wood Incrustation Filtrate recycling Bleaching Cellulosic pulp properties Circuit closure can reduce water consumption, but negative effects on pulp quality and equipment wear may make it unfeasible. This study aimed to evaluate how the alkaline filtrate of the recirculation stage (EP) affects bleaching, pulp quality and characteristics of the filtrates produced. Pre-delignified cellulose pulp from a mixture of three coniferous woods was used. Bleaching followed the D(EPO)DED sequence, with the addition of 5, 10 and 15 kg.odt-1 of the alkaline filtrate (EP) to the pre-O2 pulp. The physical and mechanical cellulosic pulp properties were evaluated in the control and with 10 kg.odt-1 of the alkaline filtrate. The inorganic compound accumulation in the system was evaluated in the control pulp and with 15 kg.odt-1 of the alkaline filtrate. The filtrate use increased the ClO2 consumption for bleaching and sulfuric acid and NaOH to adjust the pH of the stages. The pulp tensile index was higher and the tear index lower with the filtrate use in pulp without refinement, however the properties of refined pulp were similar between treatments. The filtrate increased the calcium, chloride, sodium and sulfate levels in the D stage and that of sodium and sulfate after the (EPO) stage. Filtrate recirculation can reduce water use, but it increases bleaching costs and metal accumulation in the system. 2018 artículo científico 0104-7760 https://www.redalyc.org/articulo.oa?id=74460167009 https://www.redalyc.org/journal/744/74460167009/ https://www.redalyc.org/journal/744/74460167009/html/ https://www.redalyc.org/journal/744/74460167009/74460167009.epub https://www.redalyc.org/journal/744/74460167009/movil 10.1590/01047760201824032528 en http://www.redalyc.org/revista.oa?id=744 CERNE application/pdf Universidade Federal de Lavras CERNE (Brasil) Num.3 Vol.24 |
| format | Artículo científico |
| id | redalyc_74460167009 |
| institution | Redalyc |
| language | en |
| publishDate | 2018 |
| publisher | Universidade Federal de Lavras |
| spellingShingle | THE EFFECTS OF ALKALINE FILTRATE RECIRCULATION TOWARDS THE PROPERTIES OF LONG FIBER PULPS WITH OD(EPO)DED BLEACHING SEQUENCE Luciana Cerqueira Souza Agrociencias Wood Incrustation Filtrate recycling Bleaching Cellulosic pulp properties THE EFFECTS OF ALKALINE FILTRATE RECIRCULATION TOWARDS THE PROPERTIES OF LONG FIBER PULPS WITH OD(EPO)DED BLEACHING SEQUENCE Luciana Cerqueira Souza Antonio Jose Vinha Zanuncio Jorge Luiz Colodette Agrociencias Wood Incrustation Filtrate recycling Bleaching Cellulosic pulp properties Circuit closure can reduce water consumption, but negative effects on pulp quality and equipment wear may make it unfeasible. This study aimed to evaluate how the alkaline filtrate of the recirculation stage (EP) affects bleaching, pulp quality and characteristics of the filtrates produced. Pre-delignified cellulose pulp from a mixture of three coniferous woods was used. Bleaching followed the D(EPO)DED sequence, with the addition of 5, 10 and 15 kg.odt-1 of the alkaline filtrate (EP) to the pre-O2 pulp. The physical and mechanical cellulosic pulp properties were evaluated in the control and with 10 kg.odt-1 of the alkaline filtrate. The inorganic compound accumulation in the system was evaluated in the control pulp and with 15 kg.odt-1 of the alkaline filtrate. The filtrate use increased the ClO2 consumption for bleaching and sulfuric acid and NaOH to adjust the pH of the stages. The pulp tensile index was higher and the tear index lower with the filtrate use in pulp without refinement, however the properties of refined pulp were similar between treatments. The filtrate increased the calcium, chloride, sodium and sulfate levels in the D stage and that of sodium and sulfate after the (EPO) stage. Filtrate recirculation can reduce water use, but it increases bleaching costs and metal accumulation in the system. 2018 artículo científico 0104-7760 https://www.redalyc.org/articulo.oa?id=74460167009 https://www.redalyc.org/journal/744/74460167009/ https://www.redalyc.org/journal/744/74460167009/html/ https://www.redalyc.org/journal/744/74460167009/74460167009.epub https://www.redalyc.org/journal/744/74460167009/movil 10.1590/01047760201824032528 en http://www.redalyc.org/revista.oa?id=744 CERNE application/pdf Universidade Federal de Lavras CERNE (Brasil) Num.3 Vol.24 |
| title | THE EFFECTS OF ALKALINE FILTRATE RECIRCULATION TOWARDS THE PROPERTIES OF LONG FIBER PULPS WITH OD(EPO)DED BLEACHING SEQUENCE |
| topic | Agrociencias Wood Incrustation Filtrate recycling Bleaching Cellulosic pulp properties |
| url | https://www.redalyc.org/articulo.oa?id=74460167009 https://www.redalyc.org/journal/744/74460167009/ https://www.redalyc.org/journal/744/74460167009/html/ https://www.redalyc.org/journal/744/74460167009/74460167009.epub https://www.redalyc.org/journal/744/74460167009/movil |