When kegging you usually carbonate under pressure. No sugar needed. I carb in the keg under about 20 lbs of CO2 pressure.
It lowers cost as well. But you need a gas regulator and carbon dioxide tanks, those are expensive...You can buy a lot of carbing sugar for the prices of those items. I got my tanks off of Craig's list, so that helped. Gas regulators are about $60. You need two of them...one to dispense the beer and leave it to your dispensing system, and one on a small CO2 tank to help clean, purge, sanitized tanks and lines. Otherwise you will need to remove your dispensing regulator all the stinkin' time.
It lowers cost as well. But you need a gas regulator and carbon dioxide tanks, those are expensive...You can buy a lot of carbing sugar for the prices of those items. I got my tanks off of Craig's list, so that helped. Gas regulators are about $60. You need two of them...one to dispense the beer and leave it to your dispensing system, and one on a small CO2 tank to help clean, purge, sanitized tanks and lines. Otherwise you will need to remove your dispensing regulator all the stinkin' time.