Vol. 4 No. 2 Suppl. 1 (2020) - About Water: Novel Technologies for the New Millennium
Special Issue Article

Thermal Inactivation of Viruses and Bacteria with Hot Air Bubbles in Different Electrolyte Solutions

Adrian Garrido Sanchis
School of Sciences, University of New South Wales, Canberra, Australia. Northcott Dr, Campbell ACT 2610.

Published 2021-03-22

Keywords

  • Virus,
  • E. Coli,
  • inactivation,
  • coalescence inhibition,
  • hot bubble column evaporator (HBCE),
  • sterilisation
  • ...More
    Less

How to Cite

Garrido Sanchis, A. (2021). Thermal Inactivation of Viruses and Bacteria with Hot Air Bubbles in Different Electrolyte Solutions. Substantia, 69-77. https://doi.org/10.36253/Substantia-832

Abstract

Inactivation of viruses has been an insuperable inhibition to the use of recycled water. Substantial success in solving the problem has recently been achieved using a hot column evaporator (HBCE). Here we extend the technique to inactivate E.coli and MS2 viruses in different electrolyte solutions (0.17M NaCl and 0.01M CaCl2). An increase in the inlet air temperature, from 103°C to 250°C, substantially improved the destruction of both pathogenic groups in either solution. E.coli proved to be more susceptible than viruses to inactivation in the HBCE.

The phenomenon of inhibition of bubble coalescence above 0.17M  for the NaCl solutions makes the HBCE process for this solution more efficient than for CaCl2 solutions. In part, this is because of the higher air/water interfacial area with NaCl.

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