Studies on treatment of carbonaceous wastewater by Fixed Film Aeration Tank

Yaghmaei, S ; Sharif University of Technology | 2002

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  1. Type of Document: Article
  2. Publisher: Sharif University of Technology , 2002
  3. Abstract:
  4. In this paper, a modified activated sludge process using a Fixed Film Aeration Tank (FFAT) was investigated as an improvement for the usual activated sludge or trickling filtration processes. The aeration tank of the system was arranged with fixed parallel saran nets, which were set vertically as supporting media for microbial growth. A carbonaceous solution was brought into contact with microorganisms in the media and was oxidized aerobically. Filamentous microorganisms predominantly grew on the films and the COD removal increased with the increase in accumulated biomass in the system. Simulation of treatment performance in the system was carried out using mathematical models. The biological coefficients needed for the computation were obtained from flow reactor experiments. The results showed that the dissolved COD in the FFAT effluent was not affected by the organic loading due to total oxidation in this system, but the accumulated biomass in the fixed film was influenced by the organic loading. Experimental data confirmed the theoretical values. It was concluded that this new modified activated sludge process could be applied to the treatment of carbonaceous wastewater, without sludge bulking problem and the mathematical models used by the author might be useful in practical operations
  5. Keywords:
  6. Activated carbon ; Wastewater treatment ; Trickling filter ; Aeration
  7. Source: Scientia Iranica ; Volume 9, Issue 1 , 2002 , Pages 47-52 ; 10263098 (ISSN)
  8. URL: http://scientiairanica.sharif.edu/article_2723.html