Sugar production
(Sukker produktion) |
Denmark
1999-2000
|
Sugar can be produced from
sugar beets.
Process description
The
present data refer to
sugar
production in
Danisco Sugar.
The main
processes are following: 1)
Sugar
beets from local farmers are transported to the factory
by trucks and
tractors, 2) the
sugar
beets are washed and cut into pieces, 3) the
sugar is
extracted from the beets with hot water (70oC) and
the pulp
and
liquid
are separated, 4) the liquid is purified with calcium carbonate 5) the
purified liquid is cooked in two steps in order to remove water and to form
sugar crystals, 6) the
thick
liquid with crystals is centrifuged and
sugar
crystals and molasses (a thick brown liquid) are separated, 7) the sugar is
stored in silos and packed for distribution to the market.
The pulp is used for animal feed and molasses is used for yeast production, alcohol
production or as animal feed. By-products such as grass and sugar beet tops are
used as animal feed. Production is taking place during the "campaign" from
September to January. Heat and electricity for production processes is produced
at the factory during campaign while purchased from the national grid during
rest of the year. Wastewater generated during the process is treated in the
factory's
wastewater treatment plant.
Data collection and treatment
Data have been derived from
the
Danisco Sugar Assens
green account (2001/2002) except data on
co-products production (molasses and feed pills)
which have been derived from Danisco Sugar Nakskov's
green account (2001/2002).
Technical scope
All
production processes as well as administration, product storage
and wastewater
treatment are included.
Cooling water, packaging and chemicals consumption as well as solid waste
generation have not been considered.
Representativity
Danisco
has a significant share
of the Danish market and the data are very representative to sugar
production in
Denmark
Validation
Data from Danisco Sugar
Assens have been compared wit data from Danisco Sugar Nakskov and Nykøbing.
Data from the three factories vary to
some extent but are generally in the
same order of magnitude.
Inputs and outputs
Inputs
and outputs associated with
sugar
production
are shown in the table
below. Data are provided per
ton of
sugar at
the gate of the factory.
|
|
Unit |
Quantity |
Inputs |
Sugar beet |
ton |
7.3 |
|
Water |
m3 |
1.6 |
|
Electricity |
kWh |
23 |
|
Heat |
GJ |
6.1 |
|
|
|
|
Outputs |
Products |
|
|
|
Sugar |
ton |
1 |
|
Molasses |
ton |
0.24 |
|
Feed pills |
ton |
0.33 |
|
Grass, cut off etc. |
ton |
0.53 |
|
Emission to municipal wastewater treatment plant |
|
|
|
BOD |
g |
5.8 |
|
N-tot |
g |
27 |
|
P-tot |
g |
1.5 |
Location
in database: Material/Food
from industry/ from other industries/sugar |
References
Danisco
Sugar green accounts
(2001/2002).
Administrative information
Data URL: http://www.lcafood.dk/processes/industry/sugarproduction.html
Version no.: 1.00
Authors: Per H. Nielsen,
2.-0 LCA Consultants.
Data entry:
Data have been entered in this format by Per H. Nielsen.
Data completed: July 2003.
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