Decolorization and Detoxification of Extraction-Stage Effluent from Chlorine Bleaching of Kraft Pulp by Rhizopus oryzae
AUTOR(ES)
Nagarathnamma, R.
FONTE
American Society for Microbiology
RESUMO
Rhizopus oryzae, a zygomycete, was found to decolorize, dechlorinate, and detoxify bleach plant effluent at lower cosubstrate concentrations than the basidiomycetes previously investigated. With glucose at 1 g/liter, this fungus removed 92 to 95% of the color, 50% of the chemical oxygen demand, 72% of the adsorbable organic halide, and 37% of the extractable organic halide in 24 h at temperatures of 25 to 45°C and a pH of 3 to 5. Even without added cosubstrate the fungus removed up to 78% of the color. Monomeric chlorinated aromatic compounds were removed almost completely, and toxicity to zebra fish was eliminated. The fungal mycelium could be immobilized in polyurethane foam and used repeatedly to treat batches of effluent. The residue after treatment was not further improved by exposure to fresh R. oryzae mycelium.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=91147Documentos Relacionados
- Final chlorine dioxide stage at near-neutral pH for bleaching eucalypt pulp
- Kraft Pulp Bleaching and Delignification by Dikaryons and Monokaryons of Trametes versicolor
- Manganese Peroxidase, Produced by Trametes versicolor during Pulp Bleaching, Demethylates and Delignifies Kraft Pulp
- Otimização do estágio de branqueamento de polpa kraft de eucalipto com dióxido de cloro em alta temperatura
- Effect of Residual Lignin Type and Amount on Bleaching of Kraft Pulp by Trametes versicolor
