Microbial Community from MTBE-Contaminated Soil for Aerobic Biodegradation of MTBE
| Autor: | Bahareh Montazeri, Mohammad-Hossein Sarrafzadeh |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Cometabolism 010501 environmental sciences Biodegradation Contamination 01 natural sciences Soil contamination chemistry.chemical_compound Activated sludge Bioremediation chemistry 010608 biotechnology Environmental chemistry Octane rating Environmental science Gasoline 0105 earth and related environmental sciences |
| Zdroj: | Journal of Geoscience and Environment Protection. :93-99 |
| ISSN: | 2327-4344 2327-4336 |
| DOI: | 10.4236/gep.2016.41011 |
| Popis: | This Methyl tert-butyl ether (MTBE) is one of the main additives in gasoline to increase octane rating and consequently reduce air pollution. The physico-chemical properties of this substance (high water solubility, low sorption in soil) result in high mobility and considerable concentrations in aquifers. In this survey, Isfehan Refinery that was encountered with MTBE contamination problem was selected as a case study and the MTBE degradation ability of this contaminated area by its indigenous microorganisms was investigated. In the first step of this survey, the influence of various factors on the aerobic degradation of MTBE such as mixed culture type, incubation time, microbial culture and optimal concentration of MTBE were investigated in shaking flasks and the most important factors were specified by means of fractional factorial design 1/2. In the second stage by using optimal values which obtained from the first stage, the effects of co-substare parameter and inoculum parameter were assayed by means of response surface method. The results of the experiments showed that the mixed culture type and initial concentration of MTBE were the most significant factors. The results of the experiments showed that the mixed indigenous culture acted better than activated sludge. The initial concentration of MTBE was also one of the most significant factors. At the best condition about 31 percent of MTBE was treated by co-substrating with n-hexane in a ratio of 0.2. |
| Databáze: | OpenAIRE |
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