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Information Journal Paper

Title

EFFECTS OF STIMULATOR SUBSTANCES ON AEROBIC METHYL TERT-BUTYL ETHER BIODEGRADATION BY MICROBIAL CONSORTIUM

Pages

  81-88

Keywords

METHYL TERT-BUTYL ETHER (MTBE) 

Abstract

 In this study dissolved humic substances and YEAST EXTRACT were tested in different concentrations for enhancing methyl tert-butyl ether mineralization by isolated microorganisms from a variety of sources. All experiments were conducted at a constant temperature of 25°C. Vials of 50 mL and 125 mL volume sealed with Teflon-lined Mini-Nert caps was used for microcosm experiments. In all experiments 1% sodium azide were used as control. Samples of bacterial cultures that metabolize methyl tert-butyl ether have been analysed by direct GC analysis using flame ionization detector. Cultures able to metabolize have been found in activated sludge and soils. These microorganisms were gram-positive bacterium. An aerobic MICROBIAL consortium was enriched in laboratory for four months. Methyl tert-butyl ether has been shown to biodegrade under aerobic and co-metabolic conditions. A MICROBIAL consortium isolated from activated sludges was identified as Cocobacillus. The concentration of the initial attached biomass was about 0.11 g/L of dry weight. The maximum mineralization rate and beneficial effects of stimulator substances on aerobic BIODEGRADATION of methyl tert-butyl ether occurred with the culture by combined concentrations of 500 mg/L of YEAST EXTRACT and 20 mg/L of PEAT HUMIC growth support of MICROBIAL consortium within 216 h and in presence of high oxygen levels and well mixing conditions. It was shown that adding, PEAT HUMIC and YEAST EXTRACT together, had better stimulatory effect on methyl tert-butyl ether BIODEGRADATION. Results clearly showed a stimulatory effect on methyl tert-butyl ether consumption higher than 20%. Consortium was capable of degrading concentrations of £1000 mg/L, whereas concentrations of >1000 mg/L, were not degraded.

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    • Cite

    APA: Copy

    FAROKHI, M., & AHMADIZAD, S.. (2009). EFFECTS OF STIMULATOR SUBSTANCES ON AEROBIC METHYL TERT-BUTYL ETHER BIODEGRADATION BY MICROBIAL CONSORTIUM. IRANIAN JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE AND ENGINEERING (IJEHSE), 6(2), 81-88. SID. https://sid.ir/paper/550710/en

    Vancouver: Copy

    FAROKHI M., AHMADIZAD S.. EFFECTS OF STIMULATOR SUBSTANCES ON AEROBIC METHYL TERT-BUTYL ETHER BIODEGRADATION BY MICROBIAL CONSORTIUM. IRANIAN JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE AND ENGINEERING (IJEHSE)[Internet]. 2009;6(2):81-88. Available from: https://sid.ir/paper/550710/en

    IEEE: Copy

    M. FAROKHI, and S. AHMADIZAD, “EFFECTS OF STIMULATOR SUBSTANCES ON AEROBIC METHYL TERT-BUTYL ETHER BIODEGRADATION BY MICROBIAL CONSORTIUM,” IRANIAN JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE AND ENGINEERING (IJEHSE), vol. 6, no. 2, pp. 81–88, 2009, [Online]. Available: https://sid.ir/paper/550710/en

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