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Continuous decolorization of anaerobically digested distillery wastewater

Shayegan, J ; Sharif University of Technology | 2005

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  1. Type of Document: Article
  2. DOI: 10.1016/j.procbio.2004.06.009
  3. Publisher: 2005
  4. Abstract:
  5. The aim of this research work was to decolorize anaerobically digested (UASB) and aerobically treated distillery wastewater of a process for ethanol production. An Aspergillus species isolated from the soil was used for decolorization. A sequential Plackett-Burman design in three stages was used for optimization of decolorization conditions. Both maximum decolorization and COD reduction under optimized conditions were obtained as 84%. By implementing the optimum values in a pilot scale of an activated sludge system a continuous process for decolorization was conducted. The decolorization efficiency of this system with 48 h retention time was about 75% in a limited period of 4 days. For extension of the decolorization period in a continuous process a sequencing batch reactor was used. This system with a cycle time of about 4.5 h and decolorization efficiency of 70% extended for 12 days which was more than previous reported works. The colour of undiluted wastewater reduced by only 40% with a cycle time of 17.5 h and the system was stable for about 4 days. © 2004 Elsevier Ltd. All rights reserved
  6. Keywords:
  7. Activated sludge system ; Aspergillus species ; Cycle time ; Decolorization ; Activated sludge process ; Bioreactors ; Ethanol ; Fungi ; Soils ; Wastewater treatment ; Aspergillus
  8. Source: Process Biochemistry ; Volume 40, Issue 3-4 , 2005 , Pages 1323-1329 ; 13595113 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0032959204002213