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Empirical Studies and Modeling a Solid-State Fermentation Bioreactor In order to Treat Hydrocarbon Contaminated Soil

Azizi, Yousof | 2011

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 43287 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Vossoughi, Manoochehr; Safekordi, Ali Akbar
  7. Abstract:
  8. One of the main environmental problems in the world particularly in Iran is the entrance of oil pollutions from petroleum waste and its related industries into the soil. There are various methods to eliminate petroleum pollutions from the environment such as physical, chemical, thermal and biological methods. In biological remediation, the environmental pollutions are eliminated by means of plants and microorganisms. Over the last two decades, ioremediation have been studied widely by experts of various fields. One of the most advantages of bioremediation comparing with the other methods is its low cost and the ability to perform at the site (in situ).In this project, we extracted two kinds of thermophile fungi from contaminated soil of Tehran Refinery and studied their features besides two other fungi’s features. Totally, we determined growth curves of these four fungi in 45° C. Moreover, the behavior of these fungi was explored in two different cultures. Then we added crude oil feed of the Tehran refinery in various amounts to cultures and compared the growth curves of this addition with normal mode’s curves. The results showed that the growth rate of the most fungi increased by increasing crude oil amounts. Therefore, except one fungus, we could see this trend in most fungi, so by increasing the amounts of crude oil in cultures, the maximum growth will increase too but the time to reach this maximum will decrease. The behavior of the fungus named BBRC 9057 (one of the extracted fungi from Tehran Refinery soil) was substantial and interesting. This fungus grew less than 24 hours in soil, also had the fastest growth and spread widely in the culture. The two fungi called BBRC 9057 and BBRC 20020 was elected to do TPH test on them and this election was because of the fast time that these fungi reach the maximum point of growth and also because of their maximum growth comparing with the other two fungi
  9. Keywords:
  10. Biofiltration ; Soil Contamination ; Hydrocarbon Contaminated ; Thermophile Fungus

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