Loading...

Removal of Micropollutants using the Combination of Advanced Oxidation Process and Bioreactor

Motahari, Shahriyar | 2022

153 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 55926 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Ghasemian, Saloumeh; Ghobadi Nejad, Zahra
  7. Abstract:
  8. Micropollutants are a wide group of organic compounds that are detected in most compartments of the environment. Their environmental concentration is usually in the range of few ng/l to mg/l, but they remain biologically active even at such low concentrations; may be accumulated through the food chain, and pose a serious threat to the environment, fauna, and human health. Among micropollutants, pharmaceutical active compounds (PhACs) are of special concern. It is accepted that the main sources of PhACs in the environment are effluents from wastewater treatment plants (WWTPs), where conventional activated sludge processes are not able to degrade most of them. To address these concerns, the scientific community has done extensive research on the removal, transformation, and degradation of these micropollutants from hospital wastewater, where PhACs are present at higher concentrations. Among the possible treatments, white-rot fungi (WRF) are considered a cost-effective possibility due to their relatively low cost in comparison with physical and chemical treatments and their capacity to transform most of the compounds thanks to their versatile enzymatic machinery. Another available method to remove PhACs is the advanced oxidation process such as Fenton, electro-Fenton, ozonation-biofiltration, and anodic oxidation processes. The aim of this study is the immobilization of Trametes sp. on kaldens3 support and the use of them to remove pharmaceutical active compounds such as Diclofenac, Metronidazole, and Levofloxacin. The first step in the research deals with the preliminary assessment of the individual PhACs degradation by Trametes sp. at Erlenmeyer scale and sterile conditions. Furthermore, with the aim of scaling up the PhACs degradation process, a rotating biological contactor was employed for the degradation of Diclofenac, metronidazole, and levofloxacin, operated in non-sterile batch mode. In this study, pharmaceutical compounds were removed by both biological and advanced bio-oxidation methods. The first method used Trametes sp. for the removal of pharmaceutical compounds. In a separate method, were added gallic acid, trivalent iron, and divalent manganese to the existing wastewater, which is known as the advanced bio-oxidation process. The results obtained from this method indicate the superiority of this method over the biological method
  9. Keywords:
  10. Trametes Mpecies Mold ; Biological Removal ; Micropollutants ; Wastewater Treatment Plant ; Advanced Oxidation Process ; Advanced Bio-Oxidation Process ; Laccas Enzyme ; Biological Treatment

 Digital Object List

 Bookmark

...see more