Buffering of the whole liquor, in mEq per pH unit per litre of liquor.
The assumption
We add the grist's titration buffering to the water's alkalinity and treat
the total as spread evenly through all the liquor (mash water plus sparge
water), so whatever share of the liquor reaches the kettle carries the same
share of the buffering. It's a first estimate, and it's off in ways a recipe
can't predict. The grain isn't in the kettle, what the lauter rinsed out
doesn't follow the grist's titration curve, and a slow sparge and a fast one
don't extract the same buffering from the same grain bill.
It's meant as a starting number. Once two brew days have a pH reading before
and after the kettle dose, the brewer's own figure replaces it
(kettleBufferingEstimate). Until then this is the best estimate
available, and KettleBufferingEstimate.basis records which of the two
is in use.
Buffering of the whole liquor, in mEq per pH unit per litre of liquor.
The assumption
We add the grist's titration buffering to the water's alkalinity and treat the total as spread evenly through all the liquor (mash water plus sparge water), so whatever share of the liquor reaches the kettle carries the same share of the buffering. It's a first estimate, and it's off in ways a recipe can't predict. The grain isn't in the kettle, what the lauter rinsed out doesn't follow the grist's titration curve, and a slow sparge and a fast one don't extract the same buffering from the same grain bill.
It's meant as a starting number. Once two brew days have a pH reading before and after the kettle dose, the brewer's own figure replaces it (kettleBufferingEstimate). Until then this is the best estimate available, and KettleBufferingEstimate.basis records which of the two is in use.