Integrierte Vermeidung und Verminderung der Umweltverschmutzung

Parameter
Solid output
(kg/t raw material used)
Min Max
Stones* 1 10*
Soil 8 60*
Organic matters 0.5 4
Sand* 1.5 7*
Waste water sludge** 0 3
*The highest values are for potato processing
**Data are expressed in dry substance
Table 3.66: Solid outputs from the starch industry
[115, CIAA-AAC-UFE, 2002]
3.3.7.5 Energy
Chapter 3
The energy consumption depends on the starch and starch derived products produced on the
site, i.e. on the techniques and processes involved in the starch production and co-products
management. However, the main use of energy in starch production is thermal energy for the
evaporation and drying processes. The energy used to produce starch slurry is low in
comparison to the final production of dry products. More energy is consumed at sites where
evaporation and/or drying processes are used for co-products such as fibre, solubles and
proteins than at sites where solubles are landspread and fibre is sold as wet cattle feed. The
general consumption of energy in the starch sector is given in the Table 3.67.
Energy
Electrical energy
Thermal energy
Table 3.67: Energy consumption in the starch industry
[115, CIAA-AAC-UFE, 2002]
3.3.8 Sugar
Raw material Min Max
(kWh/t raw material used)
Maize 100 200
Wheat 200 500
Potato 40 80
Maize 200 500
Wheat 800 1300
Potato 50 250
Most of the information in this sector comes from the “Guide to Establishing BAT in the Sugar
Industry; Comité Européen des Fabricants de Sucre (June 2001)” [61, CEFS, 2001], unless
otherwise stated.
3.3.8.1 Sugar beet
3.3.8.1.1 Water consumption
The water requirement for fluming is about 500 – 800 % of the amount of beet. For washing,
150 – 200 % is needed, and for a single stone catcher 70 – 100 % water is needed based on the
amount of beet. The mechanically clarified water is re-used for fluming and washing, thus only
25 – 30 % beet based industrial water needs to be added during the last rinsing of the beets after
washing.
Smaller losses are caused by evaporation of the cooling water and by discharging by-products
and wastes containing water. However, the root body consists of about 75 – 78 % water,
therefore, the beets carry sufficient water into the processing, which accumulates as condensate.
Thus, an installation producing sugar is a net water producer, because the water contained
initially in the beet becomes available as surplus cooling water [134, AWARENET, 2002].
RHC/EIPPCB/FDM_BREF_FINAL January 2006 197