Effects of Potassium Permanganate on Sludge Disintegration and Improving with Ultrasonic Pre-treatment

Özlem DEMİR
902 267

Abstract


Sludge disintegration destroys the sludge floc structure and releases the cell contents into the liquid phase to enhance the sludge anaerobic digestion. In the first stage of this study, the usage of potassium permanganate was investigated for sludge disintegration. The efficiency of the sludge disintegration was evaluated in terms of disintegration degree and  the optimum dose of potassium permanganate was determined. In the second stage of the study, the effects of specific energy variability on sludge disintegration were examined for ultrasonic frequency application. For this purpose, the range of 13021-78125 kJ/kgTS of specific energy were used for floc disintegration and the most suitable energy level was determined considering the soluble chemical oxygen demand. According to the results, after the addition of 500 mg/L potassium permanganate to the sludge and stirring during 20 minutes, 37,9 % of disintegration degree was obtained and determined as optimum value. The optimum soluble chemical oxygen demand value for ultrasonic application was obtained for 52083 kJ/kgTS and 20 minutes. In the third stage of the study, the optimal dose of potassium permanganate and optimum ultrasonic disintegration value were applied to the sludge together as a combined method. The results show that 66 of % disintegration degree was achieved for the combined application of potassium permanganate and ultrasonic disintegration.

Keywords


Sludge disintegration; potassium permanganate; ultrasonic disintegration

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DOI: http://dx.doi.org/10.17482/uujfe.20979

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