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Sonication of Microalgae and its Precipitation

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The paper deals with experimental data concerning the interaction of acoustical waves with microbial cells, like microalgae. It is shown that low frequency ultrasound causes stronger cell destruction than high frequencies. It was also found that low frequency sound could precipitate the cells in highly concentrated suspensions. The mechanisms of cell destruction and cell precipitation are studied. The phenomenon of precipitation can be explained by dissolution of micro-bubble CO2 (carbon dioxide) and removal of gas bubbles. Cell destruction by ultrasound waves results in cavitating small bubbles. The collapsing bubbles yield a rarefied zone near the cells and the latter explode.
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Document Type: Research Article

Publication date: July 1, 2002

More about this publication?
  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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