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. 1991 Oct;57(10):2858–2863. doi: 10.1128/aem.57.10.2858-2863.1991

Degradation of organochlorine compounds in spent sulfite bleach plant effluents by actinomycetes.

B Winter 1, A Fiechter 1, W Zimmermann 1
PMCID: PMC183886  PMID: 1746946

Abstract

Actinomycetes isolated from different soil samples were tested for their abilities to utilize spent sulfite bleach effluents from a paper mill. Degradation and dechlorination of the chlorinated compounds in the effluents of the first two bleaching stages, i.e., chlorination stage [(C + D)red.] and alkaline extraction stage (E1O), were monitored by determining total organic carbon (TOC) and activated-carbon-adsorbable organic-bound halogen (AOX). The isolates showed increased degradation rates after repeated incubations in the effluent-containing medium. Separation of the culture supernatants by ultrafiltration into three fractions of different molecular weights revealed substantial AOX and TOC reductions in the low-molecular-weight fraction. The AOX values of the higher-molecular-weight fractions were also reduced. Extracellular peroxidase and cell wall-bound catalase activities were produced during growth of the microorganisms on bleach effluents.

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Selected References

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