Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


Abertay team devises chemical-free disinfectant system

Abertay team devises chemical-free disinfectant system

One famous disinfectant’s claim to kill 99.9% of germs stone-dead has entered advertising folklore, but a team from the University of Abertay Dundee has gone literally a thousand times better.

Abertay researchers have devised a method of killing bacteria in water using microbubbles and ozone that has succeeded in destroying 99.9999% of E.coli bacteria in a given volume of water.

Ozone is increasingly used as an alternative to chlorination in the modern food and drink industry, but normally only eliminates 99.99% of bacteria. The Abertay team’s results from combining ozone with microbubbles are generating considerable interest among manufacturers seeking a means of ensuring ultrapure and almost completely bacteria-free water for use in food processing, without using potentially harmful chemicals.

... more about:
»bacteria »hydrodynamic »ozone

Rashmi Chand, a PhD student in Abertay’s School of Contemporary Sciences, employed hydrodynamic cavitation technology which pumps water very fast along a pipe and then through a small hole with such force that microbubbles or cavities are produced. These bubbles then implode, creating tiny pockets of high pressure and high temperature that kill bacteria.

The hydrodynamic cavitation by itself killed off 99 million out of 100 million E.coli cells in a body of water. Working with Abertay’s Professor David Bremner, Rashmi then investigated the effect of adding ozone and discovered that two bursts of the gas during the process further reduced the E.coli count to fewer than 100 cells.

Rashmi explained: “Food is a necessary for life, and safe food is essential for human health. In processing the food, ultrapure and completely bacterial free water is of prime importance.

“Conventional chemical disinfection techniques, particularly chlorination, suffer from disadvantages such as the formation of possibly carcinogenic by-products. Our method of disinfection by means of ozone and hydrodynamic cavitation opens up the possibility of eliminating or drastically reducing the use of these disinfecting chemicals,” she added.

The project was supported by the Food Processing Faraday Partnership Ltd (FPFP), which aims to promote improved interactions between the UK science, engineering and technology base and the UK food manufacturing industry.

FPFP were interested in the specialized ultrasound and hydrodynamic equipment available only at Abertay and provided a small grant to fund the acquisition of an ozoniser and enable the six-month research project to go ahead.

The Abertay team’s results are due to be published in a scientific journal in the near future.

Kevin Coe | alfa
Further information:

Further reports about: bacteria hydrodynamic ozone

More articles from Life Sciences:

nachricht First time-lapse footage of cell activity during limb regeneration
25.10.2016 | eLife

nachricht Phenotype at the push of a button
25.10.2016 | Institut für Pflanzenbiochemie

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Etching Microstructures with Lasers

Ultrafast lasers have introduced new possibilities in engraving ultrafine structures, and scientists are now also investigating how to use them to etch microstructures into thin glass. There are possible applications in analytics (lab on a chip) and especially in electronics and the consumer sector, where great interest has been shown.

This new method was born of a surprising phenomenon: irradiating glass in a particular way with an ultrafast laser has the effect of making the glass up to a...

Im Focus: Light-driven atomic rotations excite magnetic waves

Terahertz excitation of selected crystal vibrations leads to an effective magnetic field that drives coherent spin motion

Controlling functional properties by light is one of the grand goals in modern condensed matter physics and materials science. A new study now demonstrates how...

Im Focus: New 3-D wiring technique brings scalable quantum computers closer to reality

Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.

"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...

Im Focus: Scientists develop a semiconductor nanocomposite material that moves in response to light

In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.

A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...

Im Focus: Diamonds aren't forever: Sandia, Harvard team create first quantum computer bridge

By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.

"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...

All Focus news of the innovation-report >>>



Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

Agricultural Trade Developments and Potentials in Central Asia and the South Caucasus

14.10.2016 | Event News

World Health Summit – Day Three: A Call to Action

12.10.2016 | Event News

Latest News

Greater Range and Longer Lifetime

26.10.2016 | Power and Electrical Engineering

VDI presents International Bionic Award of the Schauenburg Foundation

26.10.2016 | Awards Funding

3-D-printed magnets

26.10.2016 | Power and Electrical Engineering

More VideoLinks >>>