| Autor: |
Zhou, Weichang, Winter, Bruno, Zimmermann, Wolfgang |
| Zdroj: |
Applied Microbiology & Biotechnology; 1993, Vol. 39 Issue 3, p418-423, 6p |
| Abstrakt: |
Streptomyces chromofuscus and S. rochei dechlorinated high-molecular-mass compounds (HMM) from industrial bleach effluents. Compounds of the effluents from the first chlorination [(C + D)] and the subsequent alkaline extraction stage (EO) of a sulphite cellulose pulp mill were used as substrates for the microbial transformations. HMM bleach effluent fractions obtained by ultrafiltration were treated by free and immobilized cells in two types of bioreactors. The dechlorination was followed by measuring the reduction of activated-carbon-adsorbable organic-bound halogen (AOX) and the release of inorganic chloride. While 38-45% of the organic bound chlorine was released from a mixture of (C + D) and EO stage effluents within 20 days of incubation with S. chromofuscus, only 11-16% were liberated from EO-stage HMM bleach-effluent compounds by S. chromofuscus and S. rochei. Immobilized cells of both strains remained active for over 100 days in successive batches, each releasing 12-24% of chloride from HMM bleach-effluent compounds. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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