what is the difference between CO2 produced by yeast and CO2 from a tank?
How stinky it is due to impurities!
There is a very large difference. Denny we have already went over this.
If you don't brew low oxygen, which maybe 99% of brewers don't, then it won't matter.
I'm not sure on that. While I'd agree without low oxygen practices spunding may not be required, but naturally carbing in the keg seems like a great way to keep oxidation at bay. There's been almost an arms race to minimize oxygen uptake when transferring/kegging lately, and keg conditioning seems an easy solution.
I'm planning to keg a non-LODO beer within the next week. Plan is to sanitize/purge, add primings, rack the beer, purge headspace, pressurize with whatever PSI matches the temp/carb level, then attack a spunding valve.
Hopefully the little oxygen in the CO
2 will get scrubbed by the yeast, and by already pressurizing the keg I can ensure a good seal.