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Ultrasonic pretreatment for thermophilic aerobic digestion in industrial waste activated sludge treatment

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Abstract

In order to enhance the degradation efficiency of waste activated sludge (WAS) by thermophilic aerobic digestion, an ultrasonic pretreatment was examined. It was observed that ultrasonic pretreatment increased the solubilization of organic matter in the WAS and that the solubilization ratio of the organics increased during the first 30 min but did not extensively increase thereafter. Therefore, a pretreatment time of 30 min was determined to be the economical pretreatment time from the experimental results. From the digestion experiments, which was conducted using the WAS collected from an oil refinery plant in Inchon, Korea, investigating the effects of an ultrasonic pretreatment on thermophilic aerobic digestion, it was confirmed that the proposed ultrasonic pretreatment was effective at enhancing the release of the cellular components in WAS and the degradation of released components in the thermophilic aerobic digestion.

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Authors and Affiliations

  1. Department of Chemical Engineering, Sogang University, C.P.O. Box 1142, 121-742, Seoul, Korea

    Young-Kee Kim, Myung-Shin Kwak, Won Hong Lee & Jeong-Woo Choi

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  1. Young-Kee Kim
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  2. Myung-Shin Kwak
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  3. Won Hong Lee
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  4. Jeong-Woo Choi
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Correspondence to Jeong-Woo Choi.

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Kim, YK., Kwak, MS., Lee, W.H. et al. Ultrasonic pretreatment for thermophilic aerobic digestion in industrial waste activated sludge treatment. Biotechnol. Bioprocess Eng. 5, 469–474 (2000). https://doi.org/10.1007/BF02931950

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  • DOI: https://doi.org/10.1007/BF02931950

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