Researchers at the University of New South Wales in Canberra, Australia, have proposed a new method for removing disease-causing fauna from effluent. It is based on the use of carbon dioxide to transfer heat energy, which kills microbes. The method is extremely good for its cheapness and safety.
If you heat up the gas and apply it to the bottom of the dirty water tank, hot bubbles will independently rise through the liquid to the surface. And on the way they will destroy the pathogenic fauna - due to their temperature. To do this, it must be at least 100 ° C, but not higher than 205 ° C, the hotter the better. The benefit is that heating up a small amount of gas is much easier and more cost effective than boiling the water itself.
In their experiments, Australian scientists tested various gases, including ordinary air - and carbon dioxide showed the best results. In addition, in fact, it is waste, part of the emissions into the atmosphere, so why not let it go? During this treatment, water heats up to only 55 ° C, when the gas passes through the liquid, no chemical reactions with side effects occur, and this is easier than using UV installations.
The used gas can be collected and put back into operation, and it does not need to be pumped into cylinders under high pressure, it is enough to simply heat up the cooled substance. This technique has great potential for widespread use. A test wastewater treatment plant has been installed on a pilot pig farm at the university and has already shown excellent results.