Biopulping and biobleaching of Eucalyptus camaldulensis and Acacia mangium | |
| Author | Islam, Md. Nazrul |
| Call Number | AIT Thesis no.PP-04-14 |
| Subject(s) | Pulping Bleaching Eucalyptus camaldulensis Mangium |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. PP-04-14 |
| Abstract | TlU'ee white rot fungi (Ceriporfopsis subvermispora, Phanerochate ch1ysosporium and Trametes (Corio/us) versicolor) were tested for their ability to modify/degrade lignin in cooking and bleaching. Both chips and pulps of Acacia mangium and Eucalyptus camaldulensis were pretreated with these white-rot fungi for different time period (8, 12 and 16 days for cooking; and 4, 8 and 12 days for bleaching). In chips pretreatment, kappa number was decreased with the increase of fungal treatment time and was maximum of 28% and 25% kappa reduction for acacia and eucalyptus respectively after 16 days of fungi inoculation than the control pulp. The brightness of screened pulp was increased up to 8 ISO units for this time period. At the same time viscosity was also increased up to 86 and 29 units for acacia and eucalyptus respectively with 2 to 4 units of kappa reduction than without fungi treated chips for the 8 days of inoculation. But it was decreased for the prolonged inoculation time though the difference was not significant with the untreated pulps. In bleaching, the final brightness was higher in case of FD0ED1 bleached pulps than ODoED1 bleached pulps for both the species and it was up to 8 ISO units. It was al so possible to achieve the final brightness of pulp by FDoED1 bleaching sequence. Handsheet properties were also significantly changed by fungi treatment prior to bleaching. Strength properties of handsheet were increased up to 20% by fungi treatment than the reference handsheet. Specific formation of handsheet was better when the pulp was treated with the fungi. Air permeability and roughness decreased significantly with the increase inoculation time of fungi. Considering all the pulping and papermaking properties, the performance of C. subvermispora was better than other fungi and the response of eucalyptus to fungi was better than acacia. |
| Year | 2004 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. PP-04-14 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Pulp and Paper Technology (PP) |
| Chairperson(s) | Malinen, Raimo 0. |
| Examination Committee(s) | Kolehmainen, Heikki; Nazhad, Mousa M. |
| Scholarship Donor(s) | Government of Japan;AIT Fellowship |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2004 |