Post on 27-Jul-2015
C FFEE
EXTRACTI N
CristinaSánchez
WHAT AM I GOING TO TALK ABOUT?
1 2BASICCONCEPTS
3PERCOLATION. THE ESPRESSO MACHINE
4WHAT HAVE WE LEARNT?
INTRODUCTION
INTRODUCTION
ESPRESSO COFFEE
oCapacity just
over 50 mL
oMore than
50.000.000 cups/day
are consumed in the
world
oIt contains less
caffeine than the
more dilute coffees
do
oProduct devoid of
calories
Basic concepts
Percolation
RAFFINATE
EXTRACT
SOLVENT
WATER COFFEESOLIDS (COFFEE
GROUNDS)
EXTRACTION
SOLID
COFFEE BEANS
Basic concepts
PERCOLATION. The espresso machine
PARAMETERSoWater temperature: 90
ºC
oInlet pressure: 9 atm
PERCOLATION. THE ESPRESSO
MACHINE
PARAMETERSoPercolation time: 30
s
WHAT HAVE WE LEARNT?
It is not that simple to
make a good espresso
Percolation is the essential
stage
Extraction parameters are
crucial
Functioning of an espresso
machine
QUESTIONS