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Composting of sewage sludge - Windrow turner
applications Dipl.-Ing. Karsten Runge, BACKHUS
GmbH
Sigulda, 2008-04-25
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1. Sewage sludge treatment in Germany 2.
Composting of sewage sludge 3. Windrow turner
applications
content
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1. Sewage sludge treatment in Germany
general figures - 2006
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1. Sewage sludge treatment in Germany
tendency decreasing amount of sewage sludge
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1. Sewage sludge treatment in Germany

• Compost from sewage sludge? Yes, but quality
  please!
• Past situation - problems with contaminations
  in compost from sewage sludge
• - decreasing acceptance for compost in
  agriculture
• Present situation - increasing prices for
  mineral fertilizer
• - limited recourses on phosphate (prices 100
  since 2004)
• - decreasing amount of heavy metals in sewage
  sludge
• - Farmers starting again thinking about
  compost
• Future outlook
• 1. ongoing discussion about limits for heavy
  metals, PCB (Klärschlammverordnung)
• 2. installation of a quality assurance system for
  compost made from sewage sludge
• more information www.vgva.de

Compost from sewage sludge future outlook
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2. Composting of sewage sludge
sewage sludge
structure material
Compost
general process design
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2. Composting of sewage sludge
Main influences in composting process
composting process design
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2. Composting of sewage sludge
increasing capacity
process control
homogenisation
hygenisation
turning makes the difference
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3. BACKHUS Windrow Turner applications
start 1999 structure straw, green
waste rotting 8 weeks turning 2 times per
week product agriculture landscaping
BACKHUS 17.50 Slupsk, Poland 12.000 t/a
sewage sludge
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3. BACKHUS Windrow Turner applications
start 2005 structure green waste rotting 3
month turning 1 - 2 times per week product lands
caping agriculture
BACKHUS 15.50 Vilnius, Lithuania 37.000 t/a
sewage sludge
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3. BACKHUS Windrow Turner applications
start 2000 structure straw bark rotting 6
month turning 1 - 2 times per week product lands
caping, agriculture, gardening, nurseries
BACKHUS 5.45 Chojnice, Poland 5.000 t/a
sewage sludge
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3. BACKHUS Windrow Turner applications
start 2006 structure straw , green waste, wood
waste from saw mill rotting 3 -5
month turning 2 - 3 times per week product agric
ulture landscaping
BACKHUS 16.50 Elk, Poland 9.000 t/a sewage
sludge
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3. BACKHUS Windrow Turner applications
start 2004 structure straw , wood waste from
saw mill, tobacco waste rotting 6
month turning 2 - 4 times per week product lands
caping gardening
BACKHUS 16.43 Lezajsk, Poland 4.000 t/a
sewage sludge
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3. BACKHUS Windrow Turner applications
start 2006 structure straw , chicken
manure rotting 3 -4 month turning 1 times per
week product landscaping gardening
BACKHUS 16.43 Rumianek, Poland 3.000 t/a
sewage sludge
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3. BACKHUS Windrow Turner applications
start 2006 structure straw rotting 6
month turning 2-3 times per week product landsca
ping
BACKHUS 16.36 Sarzyna, Poland 2.500 t/a
sewage sludge
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3. BACKHUS Windrow Turner applications
start 2001 structure straw , green
waste rotting 6 month turning 2 times per
week product agriculture, gardening
BACKHUS 15.50 Swarzewo, Poland 6.000 t/a
sewage sludge
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3. BACKHUS Windrow Turner applications
start 2003 structure straw rotting 2 - 4
month turning 2 - 3 times per week product agric
ulture
BACKHUS 16.55 Nordhorn, Germany 10.000 t/a
sewage sludge
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3. BACKHUS Windrow Turner applications
start 2005 structure green waste rotting 6 - 8
weeks turning 1 - 2 times per week product agric
ulture
BACKHUS 16.43 Asendorf, Germany 8.000 t/a
sewage sludge
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3. BACKHUS Windrow Turner applications
start 2000 facility 10 lanes aeration under
floor structure green waste rotting 4 weeks
composting 4 weeks maturation turning 2 - 3
times per week product agriculture
BACKHUS 9.45 Luxemburg 12.000 t/a sewage
sludge
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3. BACKHUS Windrow Turner applications
start 2002 structure straw rotting 8 -12
weeks turning 2 - 3 times per week product agric
ulture
BACKHUS 5.45 Nihyregyhaza, Hungary 7.000 t/a
sewage sludge
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3. BACKHUS Windrow Turner applications
start 2005 structure straw rotting 6
weeks turning 3 times per week product agricultu
re
BACKHUS 16.50 - Egypt 25.000 t/a sewage sludge
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3. BACKHUS Windrow Turner applications
BACKHUS 15.50 drying of sludge from WWTP
Australia 40.000 t/a
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3. BACKHUS Windrow Turner applications
BACKHUS 17.50 composting of sugar cane waste
Columbia 70.000 t/a
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3. BACKHUS Windrow Turner applications
Widest range of customer based project solutions
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For more information please visit www.backhus.com
Thanks for your attention!
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