high-gravity fermentation

ADVANTAGES
lower energy costs
maximal use of equipment and space
improved physical stability from better precipitation of chill haze
improved flavor stability

DISADVANTAGES
wort- and hop- efficiencies can be reduced
increased yeast stress
50% or more yeast is needed
number of yeast generations is reduced
oxygen levels as high as 10-12pmm are needed
increased cost of losses
longer fermentation times
decreased foam stability
higher final pH