Composting of sewage sludge Windrow turner applications Dipl

Composting of sewage sludge Windrow turner applications Dipl. -Ing. Karsten Runge, BACKHUS Gmb. H Sigulda, 2008 -04 -25

1. Sewage sludge treatment in Germany 2. Composting of sewage sludge 3. Windrow turner applications content

1. Sewage sludge treatment in Germany - 2006 Series 1; incineration; 884, 927; 40% Series 1; agriculture; 726, 706; 33% agriculture landscaping incineration Series 1; landscaping; 600, 685; 27% general figures - 2006

1. Sewage sludge treatment in Germany Sewage sludge from municipal WWTP in Germany dry solids amount in t/a total amount agriculture tendency – decreasing amount of sewage sludge

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

2. Composting of sewage sludge pre treatment (shredding, mixing) structure material composting (regular turning & monitoring) fine treatment (screening) general process design Compost

2. Composting of sewage sludge n ge y Ox composting process design Moisture Main influences in composting process C/N Ra tio

2. Composting of sewage sludge homogenisation hygenisation turning makes the difference process control increasing capacity

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

3. BACKHUS Windrow Turner applications start: 2005 structure: green waste rotting: 3 month turning: 1 - 2 times per week product: landscaping & agriculture BACKHUS 15. 50 – Vilnius, Lithuania – 37. 000 t/a sewage sludge

3. BACKHUS Windrow Turner applications start: 2000 structure: straw & bark rotting: 6 month turning: 1 - 2 times per week product: landscaping, agriculture, gardening, nurseries BACKHUS 5. 45 – Chojnice, Poland – 5. 000 t/a sewage sludge

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: agriculture & landscaping BACKHUS 16. 50 – Elk, Poland – 9. 000 t/a sewage sludge

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: landscaping & gardening BACKHUS 16. 43 – Lezajsk, Poland – 4. 000 t/a sewage sludge

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

3. BACKHUS Windrow Turner applications start: 2006 structure: straw rotting: 6 month turning: 2 -3 times per week product: landscaping BACKHUS 16. 36 – Sarzyna, Poland – 2. 500 t/a sewage sludge

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

3. BACKHUS Windrow Turner applications start: 2003 structure: straw rotting: 2 - 4 month turning: 2 - 3 times per week product: agriculture BACKHUS 16. 55 – Nordhorn, Germany – 10. 000 t/a sewage sludge

3. BACKHUS Windrow Turner applications start: 2005 structure: green waste rotting: 6 - 8 weeks turning: 1 - 2 times per week product: agriculture BACKHUS 16. 43 – Asendorf, Germany – 8. 000 t/a sewage sludge

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

3. BACKHUS Windrow Turner applications start: 2002 structure: straw rotting: 8 -12 weeks turning: 2 - 3 times per week product: agriculture BACKHUS 5. 45 – Nihyregyhaza, Hungary – 7. 000 t/a sewage sludge

3. BACKHUS Windrow Turner applications start: 2005 structure: straw rotting: 6 weeks turning: 3 times per week product: agriculture BACKHUS 16. 50 - Egypt – 25. 000 t/a sewage sludge

3. BACKHUS Windrow Turner applications BACKHUS 15. 50 – drying of sludge from WWTP – Australia – 40. 000 t/a

3. BACKHUS Windrow Turner applications BACKHUS 17. 50 – composting of sugar cane waste – Columbia – 70. 000 t/a

3. BACKHUS Windrow Turner applications Widest range of customer based project solutions

For more information please visit www. backhus. com Thanks for your attention! We supply solutions – not machines only!