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http://hdl.handle.net/10773/24424
Title: | Removal of the organic content from a bleached kraft pulp mill effluent by a treatment with silica-alginate-fungi biocomposites |
Author: | Duarte, Katia Justino, Celine I. L. Pereira, Ruth Panteleitchouk, Teresa S. L. Freitas, Ana C. Rocha-Santos, Teresa A. P. Duarte, Armando C. |
Keywords: | Kraft pulp mill effluent Fungi Pleurotus sajor caju Rhizopus oryzae Biocomposites Wastewater treatment |
Issue Date: | 2013 |
Publisher: | Taylor & Francis |
Abstract: | This study attempts a treatment strategy of a bleached kraft pulp mill effluent with Rhizopus oryzae or Pleurotus sajor caju encapsulated on silica-alginate (biocomposite of silica-alginate-fungi, with the purpose of reducing its potential impact in the environment. Active (alive) or inactive (death by sterilization) Rhizopus oryzae or Pleurotus sajor caju was encapsulated in alginate beads. Five beads containing active and inactive fungus were placed in a mold and filled with silica hydrogel (biocomposites). The biocomposites were added to batch reactors containing the bleached kraft pulp mill effluent. The treatment of bleached kraft pulp mill effluent by active and inactive biocomposites was performed throughout 29 days at 28°C. The efficiency of treatment was evaluated by measuring the removal of organic compounds, chemical oxygen demand and the relative absorbance ratio over time. Both fungi species showed potential for removal of organic compounds, colour and chemical oxygen demand. Maximum values of reduction in terms of colour (56%), chemical oxygen demand (65%) and organic compounds (72-79%) were attained after 29 days of treatment of bleached kraft pulp mill effluent by active Rhizopus oryzae biocomposites. The immobilization of fungi, the need for low fungal biomass, and the possibility of reutlization of the biocomposites clearly demonstrate the industrial and environmental interest in bleached kraft pulp mill effluent treatment by silica-alginate-fungi biocomposites. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/24424 |
DOI: | 10.1080/03601234.2012.716745 |
ISSN: | 1093-4529 |
Appears in Collections: | CESAM - Artigos DQ - Artigos |
Files in This Item:
File | Description | Size | Format | |
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Duarte et al. - 2013 - Removal of the organic content from a bleached kra.pdf | 334.15 kB | Adobe PDF |
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