Destroying antimicrobial resistant bacteria (AMR) and difficult, opportunistic pathogen using cavitation and natural oils/plant extract.

Autor: Mane MB; Chemical Engineering and Process Development Division, CSIR-National Chemical Laboratory, Pune, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-NCL Pune, India., Bhandari VM; Chemical Engineering and Process Development Division, CSIR-National Chemical Laboratory, Pune, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-NCL Pune, India. Electronic address: vm.bhandari@ncl.res.in., Balapure K; Chemical Engineering and Process Development Division, CSIR-National Chemical Laboratory, Pune, India., Ranade VV; Chemical Engineering and Process Development Division, CSIR-National Chemical Laboratory, Pune, India.
Jazyk: angličtina
Zdroj: Ultrasonics sonochemistry [Ultrason Sonochem] 2020 Dec; Vol. 69, pp. 105272. Date of Electronic Publication: 2020 Jul 24.
DOI: 10.1016/j.ultsonch.2020.105272
Abstrakt: The present study reports, for the first time, a new and techno-economic strategy for effective removal of antimicrobial resistant bacteria (AMR) and difficult, opportunistic pathogen using cavitation and natural oils/plant extract. A hybrid methodology using natural oils of known health benefits has been discussed in combination with conventional physico-chemical method of hydrodynamic cavitation that not only provides efficient and effective water disinfection, but also eliminates harmful effects of conventional methods such as formation of disinfection by-products apart from reducing cost of treatment. A proof-of concept is demonstrated by achieving exceptionally high rates for practically complete removal of antimicrobial resistant (AMR) and relatively less researched, gram-negative opportunistic pathogen, Pseudomonas aeruginosa and gram-positive methicillin resistant, Staphylococcus aureus using a natural oil-Peppermint oil and two different cavitating reactors employing vortex flow (vortex diode) and linear flow (orifice) for hydrodynamic cavitation. >99% disinfection could be obtained, typically in less than 10 min, using vortex diode with operating pressure drop of 1 bar and low dose of 0.1% peppermint oil as an additive, depicting very high rates of disinfection. The rate of disinfection can be further increased by using simple aeration which can result in significant lowering of oil dose. The conventional device, orifice requires relatively higher pressure drop of 2 bar and comparatively more time (~20 min) for disinfection. The cost of the disinfection was also found to be significantly lower compared to most conventional processes indicating techno-economic feasibility in employing the developed hybrid method of disinfection for effectively eliminating bacteria including AMR bacteria from water. The developed approach not only highlights importance of going back to nature for not just conventional water disinfection, but also for eliminating hazardous AMR bacteria and may also find utility in many other applications for the removal of antimicrobial bacteria.
Competing Interests: Declaration of Competing Interest One of the author Prof. (Dr.) Vivek V. Ranade is a founder of VIVIRA process Technologies Pvt. Ltd. which commercially offers vortex diode based cavitation device.
(Copyright © 2020 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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