Intermittent Ozone Application in Aerobic Sludge Digestion

Muz, Melis; Ak, Mümtaz; Komesli, Okan Tarık; Gokcay, Celal F.

doi:10.1080/01919512.2013.824808

Cited by 7 publications

(1 citation statement)

References 27 publications

(31 reference statements)

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“…The efficiency of anaerobic digestion can be greatly enhanced by using physical and/or chemical pretreatment processes improving the rate of hydrolysis steps (Braguglia et al, 2012;Cesaro and Belgiorno, 2013;. Recently, waste activated sludge (WAS) pretreatments like thermal, alkaline, ultrasonic, and ozone oxidation methods have been applied to improve hydrolysis and anaerobic digestion performance, and a range of acceptable results have been reported to date (Braguglia et al, 2012;Muz et al, 2014;Salsabil et al, 2010;Naddeo et al,2014). The term "ultrasonic" is generally taken to mean that the "frequency" of the wave is greater than the upper limit of human hearing (usually taken to be 20 kHz) (Erden et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

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

2016

Global NEST Journal

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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 and 60 min and three cycles of 15 min. Mixed liquor suspended solids (MLSS)was ranged between 28100±282 and 12000±642 mg l -1 . 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 and 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.

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