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Efficiency of integrated ultrasonic and anaerobic digestion of oil refinery wastewater sludge

  • Authors (legacy)
    Corresponding: Azemnia S.
    Co-authors: Almasi A., Mosavi A., Mohammadi M., Azemnia S., Godini K., Zarei A., Mohammadi S. and Saleh E.
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  • gnest_01924_published.pdf
  • Paper ID
    gnest_01924
  • Paper status
    Published
  • Date paper submitted
  • Date paper accepted
  • Date paper online
DOI
https://doi.org/10.30955/gnj.001924
Abstract

The main effects of ultrasonic sludge are solubilization and release of organic components and biodegradability enhance of sludge by disrupting the physical, chemical and biological properties sludge. The objective of the current study was to determine the effect of ultrasound on anaerobic digestion of oil refinery sludge subjected to different pretreatments. A 300-ml anaerobic reactor was filled with 250 of the waste activated sludge and placed on a hot plate magnet for 41 d. A vibrato bath (40 kHz, 100W) was used in 30 min, 60 min and three cycles of 15 min. Mixed liquor suspended solids (MLSS)was ranged between 28100±282 and 12000±642 mg/L. The data were collected in a log phase condition. TSS, VSS, TCOD and BOD5 were measured following the standard methods. The combined reactor had the best performance in sludge digestion compared to anaerobic reactor with/ without ultrasonic pretreatment. Between two irradiation times (30, 60 min) and the same situation, 60 min ultrasonic pretreatment was found to be more effective. Ultrasonic pretreatment accelerated the digestion process. In this project, oil refinery sludge with industrial feature attained to log phase after 41 days.

 

Keywords
Ultrasonic Anaerobic digestion Oil Refinery Sludge
Cite this article
Azemnia, S. et al. (2016) “Efficiency of integrated ultrasonic and anaerobic digestion of oil refinery wastewater sludge”, Global NEST Journal, 18(4). Available at: https://doi.org/10.30955/gnj.001924.
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  • gnest_01924_published.pdf