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Biodegradation of dichloromethane along with other VOCs from pharmaceutical wastewater
V. S. Priya,
Published in Humana Press Inc.
2013
PMID: 23306883
Volume: 169
   
Issue: 4
Pages: 1197 - 1218
Abstract
The present study dealt with the interaction of dichloromethane (DCM) with other non-chlorinated organic solvents such as methanol, acetone, toluene, and benzene, which are commonly present in the pharmaceutical wastewater, during biodegradation by mixed bacterial consortium. Non-chlorinated solvents were easily degradable even at an initial concentration of 1,000 mg/L, whereas only 20 mg/L of DCM was degraded when used as sole carbon source. The Monod Inhibition model appears to simulate the single pollutant biodegradation kinetics satisfactorily. In dual substrate systems, low concentrations (100 mg/ L) of non-chlorinated solvents did not interfere with the DCM degradation. Non-interaction sum kinetics model was able to simulate the experimental results well in this case. However, high concentrations of non-chlorinated solvents (1,000 mg/L) affected the DCM degradation significantly. There was severe competition between the chlorinated and the non-chlorinated solvents. In this case, competitive inhibition model predicted the experimental results better compared to co-metabolism model. In multiple substrate system also, presence of DCM prolonged the degradation of the other non-chlorinated solvents. However, the presence of non-chlorinated compounds accelerated the degradation of DCM. The results of the present study may be helpful in optimal design of biological systems treating mixed pollutants. © Springer Science+Business Media New York 2013.
About the journal
JournalApplied Biochemistry and Biotechnology
PublisherHumana Press Inc.
ISSN02732289
Open AccessNo
Concepts (32)
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    Acetone
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    Carbon
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    Dichloromethane
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    Organic solvents
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    Pollution
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    Solvents
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    BIODEGRADATION KINETICS
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    CHLORINATED COMPOUNDS
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    CHLORINATED ORGANIC SOLVENTS
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    Competitive inhibition
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    Initial concentration
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    NON-CHLORINATED SOLVENTS
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    Pharmaceutical wastewater
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    SUBSTRATE INTERACTION
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    Biodegradation
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    Benzene
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    Methanol
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    Organic solvent
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    Toluene
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    Volatile organic compound
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    Article
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    Chemical reaction kinetics
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    Drug industry
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    Simulation
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    Waste water
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    Water pollutant
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    Bioremediation
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    Metabolism
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    Biodegradation, environmental
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    METHYLENE CHLORIDE
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    Volatile organic compounds
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    Water pollutants, chemical