Abstract
Magnetization of acclimated activated sludge with the application of an external magnetic field was observed using a magnetic force microscope and can be expressed as the visual magnetic flux density graph. FeCl3 addition up to 0.1% (w/v) into the sludge, which was acclimated with synthetic sewage wastewater, enhanced the magnetization. Such magnetization was also observed in the activated sludge obtained from the practical wastewater treatment plants of a food processing plant and sewage wastewater. FeCl3 addition also enhanced the sludge magnetization. The possibility is suggested that this magnetization causes the flock to enlarge and enhance sedimentation of the activated sludge on application of an external magnetic field.
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Hattori, S., Watanabe, M., Sasaki, K. et al. Magnetization of activated sludge by an external magnetic field. Biotechnology Letters 24, 65–69 (2002). https://doi.org/10.1023/A:1013869611352
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DOI: https://doi.org/10.1023/A:1013869611352