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Ultrasonic and Microwave Assisted Applications in Synthesis, Processing and Extraction

A special issue of Sustainability (ISSN 2071-1050). This special issue belongs to the section "Sustainable Chemical Engineering and Technology".

Deadline for manuscript submissions: closed (30 June 2021) | Viewed by 3164

Special Issue Editors


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Guest Editor
Department of Bioresources and Polymer Science, University POLITEHNICA of Bucharest, 1-7 Ghe.Polizu, Bucharest-011061, Romania
Interests: microwave chemistry, sonochemistry, biorefineries, bioproducts, environmental pollution, green chemistry

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Guest Editor
Department of Chemical and Biochemical Engineering, University POLITEHNICA of Bucharest, 1-7 Ghe.Polizu, Bucharest 011061, Romania
Interests: Time Scales of (Bio)Chemical Processes; Integration and Intensification of (Bio)Chemical processes; Biological, Biochemical and Chemical Reactors; Systems Optimization and Optimal Control; Artificial Intelligence in (Bio)Chemical Engineering

Special Issue Information

Dear Colleagues,

In the 21st century, resources depleting, stricter legislation and the increase of waste disposal costs, put rising pressure on the chemical and related industries. To survive in the current climate, the issue of sustainability must be fundamental approach for anyone working in teaching, research and industry.
One-way process industries may comply to this new paradigm is the application of processes intensification techniques for higher energy efficiency, thus, sustainability.
Ultrasound (US) and microwave (MW) techniques are amongst the most attractive methods for process intensification, but nowadays process industries are rather conservative concerning technology change, especially concerning the way the activation energy is supplied in chemical processes.
Although the first articles describing the combined use of US and MW have appeared starting with this century, there are still many aspects that have not been completely elucidated: mathematical modeling of the combined effects of US and MW, the special conditions that an equipment must meet to operate under combined US and MW fields, but, especially, the scaling up of this equipment for industrial use.
This Special Issue will comprise a selection of papers presenting original and innovative contributions in the field of combined use of US and MW in material processing, chemical synthesis, extraction of natural principles, etc.
Papers selected for this Special Issue will be subject to a rigorous peer-review process with the aim of rapid and wide dissemination of research results, developments, and applications.

Prof. Ioan Calinescu
Prof. Vasile Lavric
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Sustainability is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • sustainability
  • ultrasound
  • microwave
  • intensification techniques
  • sonochemistry
  • dielectric heating
  • scale-up
  • enabling technologies
  • extraction
  • synthesis

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Published Papers (1 paper)

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Research

14 pages, 3601 KiB  
Article
Inactivation of Algae and Plankton by Ultrasonic Cavitation
by Atsushi Honda, Fumiya Sugino and Ken Yamamoto
Sustainability 2021, 13(12), 6769; https://doi.org/10.3390/su13126769 - 15 Jun 2021
Cited by 5 | Viewed by 2629
Abstract
Microbial treatment by ultrasonic waves has been attracting attention as a useful water treatment technology because it does not use special chemicals and the equipment is simple. In addition, because microbial cells are destroyed during treatment, it can be applied to ingredient extraction [...] Read more.
Microbial treatment by ultrasonic waves has been attracting attention as a useful water treatment technology because it does not use special chemicals and the equipment is simple. In addition, because microbial cells are destroyed during treatment, it can be applied to ingredient extraction technology. Although ultrasonic cavitation bubbles are thought to be involved in the processing mechanism, the details of the mechanism remain unclear. The purpose of this study was to elucidate the destruction mechanism of algae, microcapsules, and plankton by ultrasonic waves. Each sample was irradiated with ultrasonic waves over a wide range of frequencies, and frequency dependence was observed in all the samples. For algae and microcapsules, we matched the frequencies against the resonance frequency calculated based on the mechanical resonance model using adjacent ultrasonic cavitation bubbles. As a result, a good match was found. For plankton, partial damage to the shape was observed after ultrasonic irradiation, suggesting that shear stress, which is a local action caused by bubbles, was involved. By estimating the shear stress value based on the vibration equation of bubble, it was confirmed that the tendencies match. Full article
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