Aerobic and Anaerobic Biotransformations and Treatment of Chlorinated Pulp Bleach Waste Constituents
| Autor: | Paivi M. Makinen, John F. Ferguson, Jaakko A. Puhakka, Margareta Lundin |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
Environmental Engineering
Bleach Pulp (paper) chemistry.chemical_element Mineralization (soil science) Biodegradation engineering.material Chloride chemistry.chemical_compound chemistry Environmental chemistry Chlorine medicine engineering Phenols Anaerobic exercise Water Science and Technology medicine.drug |
| Zdroj: | Water Science and Technology. 29:73-80 |
| ISSN: | 1996-9732 0273-1223 |
| DOI: | 10.2166/wst.1994.0703 |
| Popis: | Biotransformations and treatment of several chlorinated, hydroxylated and methoxylated monoaromatic compounds were studied in batch bottle bioassays and continuous-flow fluidized-bed reactors. With the aerobic enrichment, polychlorinated phenols were biodegraded with simultaneous release of inorganic chloride in amounts equal to mineralization stoichiometrics. Aerobic removal of 4,5-dichlorocatechol and 4,5- dichlorovanillin were associated with the release of inorganic chlorine. The aerobic enrichment showed no activity against mono- or di-O-methylated phenols. With the anaerobic enrichment, reductive transformations of these compounds were observed. These transformations included reductive dechlorinations, de-O-methylations and dehydroxylations. High-rate operation of an aerobic fluidized-bed reactor resulted in over 99.7% biodégradation of polychlorophenols. In the anaerobic fluidized-bed reactor, over 95% removal of chlorophenols with no apparent accumulation of lower chlorinated phenols indicated complete dechlorination. |
| Databáze: | OpenAIRE |
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