Integrierte Vermeidung und Verminderung der Umweltverschmutzung

Chapter 3
3.3.11.5 Energy
Breweries need both electrical and heat energy. Combined heat and power generation is in use
in some facilities. Depending on availability, price and legal requirements, different fuels such
as coal, oil or gas are used. Table 3.76 gives details on the energy, heat and electricity
consumptions in some German breweries.
Heat Electrical Beer
Specific
Year Coal Oil Gas Total Power Output Heat Power
(x 10 3 kWh) (x 10 6 kWh) (x 10 6 hl) (kWh/hl) (kWh/hl)
1997 157 929 2992 4078 1.2 114.8 35.5 10.4
1998 150 846 2943 3939 1.2 111.7 35.3 10.6
1999 162 789 2956 3907 1.2 112.8 34.6 10.4
2000 150 683 2809 3642 1.2 110.4 33.0 10.5
(x 10 3 MJ) (MJ/hl)
1997 565 3345 10771 14681 127.9
1998 541 3046 10595 14182 127.0
1999 583 2841 10642 14066 124.7
2000 540 2458 10113 13111 118.7
Table 3.76: Energy consumption of German breweries with more than 20 employees
[65, Germany, 2002]
A brewery without a sophisticated heat recovery system consumes about 27.78 – 55.55 kWh/hl
beer (100 - 200 MJ/hl) [136, CBMC - The Brewers of Europe, 2002]. The main heat consuming
process steps are mashing, wort boiling, generation of hot liquor, CIP, sterilising, bottle/keg
cleaning and pasteurising. Heat consumption for some departments is given in Table 3.77.
Minimum Mean Maximum Literature 1 Measured 2
Department/
process
figure range
(MJ/hl beer) (MJ/hl beer)
Brewhouse 87 92 121 84 – 113 50 – 80
Bottling
installation
58 86 94 25 – 46 38 – 58
Kegging
installation
8 11 13 8 – 13
Process water 3 4 8 4 – 8
Service water 8 – 17
Miscellaneous 33 – 46 95
Total 156 193 236 162 – 243 183 – 233
(kWh/hl beer) (kWh/hl beer)
Brewhouse 24.17 25.56 33.61 23.33 – 31.39 13.89 – 22.22
Bottling
installation
16.11 23.89 26.11 6.94 – 12.78 10.56 – 16.11
Kegging
installation
2.22 3.06 3.61 2.22 – 3.61
Process water 0.83 1.11 2.22 1.11 – 2.22
Service water 2.22 – 4.72
Miscellaneous 9.17 – 12.78 26.39
Total 43.33 53.62 65.55 44.99 – 67.50 24.44 – 64.72
1)
20000 to 500000 hl beer sold/yr
2)
300000 to 500000 hl beer sold/yr
Table 3.77: Heat consumption for different brewery processes
[65, Germany, 2002]
206 January 2006 RHC/EIPPCB/FDM_BREF_FINAL