On Sun, 19 Sep 2021 10:38:29 +0100, newshound
Post by newshoundPost by Tim+Post by AndrewJust heard this on the Radio 2 9PM news.
Fertiliser plants have shut down because of the cost of gas and
apparently the process creates CO2 which is used to gas chickens and
create fizzy drinks.
I can only assume that they use CO2 rather than N2 for animal
euthanasia as it’s cheaper. Thoroughly horrible stuff to inhale. If
this promotes a switch to N2 then this would be a very good thing.
Tim
More than you probably wanted to know here
https://en.wikipedia.org/wiki/Inert_gas_asphyxiation
which does say different species react in different ways. I'd like to
think the licensing authorities rather than the accountants select the
methods.
They do! Based on scientific data gained over many years.
CO2 at lower levels induces analgesia, then after longer exposure or
higher concentrations anaesthesia then ultimately (time or higher %) the
degree of cerebral acidosis (& hypoxia) proves fatal. It is usually used
in poultry in a phased system initially <40% (often as low as 18%) then
raised progressively to 70% or so. In pigs the usual system is >80% CO2
the pigs being lowered into the gas resulting in exposure to a rising
concentration inducing unconsciousness and then death - though the rate of
rise in % is faster then in poultry, but is likely to be less stressful
than some other methods.
The use of inert gasses (initially Argon now more usually N2) only induces
cerebral hypoxia/anoxia without any of the analgesic properties of CO2, it
also produces marked convulsions, as far as can be established after loss
of consciousness. Argon was used initially due to being heaver than air -
whilst N2 is lighter than air so is harder to contain.
Thus sometimes N2 & CO2 are mixed (< 30% CO2 & <2% O2) the CO2 reducing
the convulsions & speeding the loss of consciousness.
DAMHIK - IJD OK
It (CO2) is also used in the modified atmosphere packing that is used for
many food stuffs these days, so also a problem is there is a shortage.
Avpx
--
They both savoured the strange warm glow of being much more ignorant than
ordinary people, who were ignorant of only ordinary things. (Equal rites)
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