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Type of publication: research article
Type of publication (PDB): Straipsnis Clarivate Analytics Web of Science / Article in Clarivate Analytics Web of Science (S1)
Field of Science: Elektros ir elektronikos inžinerija / Electrical and electronic engineering (T001);Mechanikos inžinerija / Mechanical Engineering (T009);Fizika / Physics (N002)
Author(s): Struckas, Arūnas;Vasiljev, Piotr;Bareikis, Regimantas;Borodinas, Sergejus;Kasperovičienė, Jūratė
Title: Ultrasonic zeppelin-shape transducer for algae oil extraction
Is part of: Sensors and actuators A: Physical. Lausanne : Elsevier Science, 2017, vol. 263
Extent: p. 754-761
Date: 2017
Note: 13th International Workshop on Piezoelectric Materials and Applications in Actuators and Energy Conversion Materials and Devices, Jeju, South Korea, August 21-24, 2016
Keywords: Algae;Ultrasonication;Bio-fuel
Abstract: Energy consumption worldwide is increasing each year. Alternative energy sources supplement these energy demands. Algae are one of such alternative energy sources. As oil needs to be extracted from the ground, algae are needed to be prepared for bio-fuel production. There are a few methods that are used for algae to crack open: chemical and mechanical. Among mechanical methods, the one that is suitable for that purpose is ultrasonication. The current paper presents an ultrasonic cylinder-shape transducer designed for that purpose. Commercial piezo-mechanical systems for algae processing are mostly ordinary longitudinal transducers. The efficiency of such systems is based on irradiation surface, which is normally about 1000 mm(2). In our system, we propose a different approach to increase the vibration area that produces a cavitation field needed to crack the cell wall of algae. Normally, the active end of transducers is immersed into a reservoir filled with algae-liquid mixture. We propose to create a vibrating reservoir as a part of transducer, thus enlarging the area of acoustic irradiation. Excitation is produced by two full-wave longitudinal transducers orientated opposite to each other and connected to a specifically designed resonant chamber. Experiments have been carried out using two colonial algae species, namely Scenedesmus acutus Meyen and single-cell Monoraphidium griffithii. Comparative experiments have been performed using the standard commercial ultrasonic system for algae processing and the proposed system. The key parameters obtained from the experiments include power consumption and destruction rate
Affiliation(s): Gamtos tyrimų centras
Vilniaus Gedimino technikos universitetas
Vytauto Didžiojo universitetas
Švietimo akademija
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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