RE: Cooling towers9 Aug 2020 16:26
@Stu from my days as an engineer, Legionella risk, particularly in nursing homes posed a risk of dormant water at elevated temperature. However, at 55 degrees, which is the maximum recommended hot water temperature in a nursing home, there is no risk as the bacteria dies off.
The risk of the virus derived from rivers for cooling towers is slim to nil for a number of reasons. The first thing to consider is this. Many studies have shown that the highest risk of virus transmission from an individual is up to 8 days from becoming infected.
Next. While sewage contains the virus from feacal matter shed by the infected person, it generally is not in a tranmissive state, where the lipid encapsulating the virus is damaged.
Generally when water is taken in for processing it undergoes some treatment, after testing. This can be as simple as UV lighting, but in general is not allowed to be processed without some testing.
Here too, temperature plays a major role in killing the virus, so above 25 degrees the chance of the virus surviving is slim to nil.
Ordinarily a scientist would finish by saying that is not proof, but it has a high probability of the above being accurate. Hope that helps