http://uabioconf.org/

1. Progress in anaerobic mono-digestion of swine manure
W.J. Oosterkamp
• .

2. Pro-mest 1988 - 1994
• Demonstration facility 0.1 million m3/a (10 million €)
• Full scale facility 0.6 million m3/a (45 million €)
• Farmers organisations feared legislation to reduce
the number of swines

3. Promest bankrupt in 1994
• Technical problems
• Plant never reached full capacity
• Farmers had lower cost options for disposal of
swine manure

4. Ecoson reactors
• .

5. Ecoson
• Processing capacity 0.1 million m3/a
• Investment 11 million Euros
• Gate fee 15 €/m3 manure

6. Ecoson fire

7. Swine manure with straw
pellets
• Methane yield 0.25 m3
/kg
• Generator efficiency 4.0 kWe/m3
• Pellet price 0.085 €/kg
• Substrate price 0.085 €/kWe
• Income 0.128 €/kWe
• Lower pellet price required
• Higher methane yield
• Fertiliser value of straw 0.025 €/kg

8. New stable:
Separation urine and faeces
• .

9. Microferm Sterksel
Continuously stirred tank reactor
• .

10. Crossflow filter
+ 30 % more solids
• .

11. Biofilms I
Archeae and Microbes
• .

12. Biofilms II
• .

13. Carrier material biofilms
• .

14. Carrier material biofilm
foulum (DK) plant
• .

15. Test at foulum (DK)
• .
• .
• .
• .
• Control (CSTR) Thermophilic 20 days 2 - 8 m3/m3
• Specific methane yield 0.33 m3/(m3.d)

16. Upflow reactor

17. UDR II
• .

18. Biofilm attachement to
floating materials
• Straw
• Heavy manure particles
• Zeolite
• Magnesium phosphate compounds

19. Sedimentation of swine
manure
• .

20. Phases of sequential batch
reactor
• .

21. SBR
• .

22. Simplified induced blanket
reactor
• .

23. Langenwetzendorf anaerobic
digestion plant attached to swine farm
• .

24. Langenwetzendorf
substrates
• .

25. Summary
• Specific methane production
• Ecoson 0.4 m3
/(m3
.d)
• Modern stable + Maize silage 1.2 m3
/(m3
.d)
• Microferm 0.8 m3
/(m3
.d)
• UDR 0.6 m3
/(m3
.d)
• Mg-P 0.14 m3
/(m3
.d)
• SBR 0.7 m3
/(m3
.d)
• Langenwetzendorf 1.6 m3
/(m3
.d)

26. Conclusions
• Mono-digestion of swine manure is only economic with a
gate fee and simplified clean-up of thin fraction of effluent.
• Pelletising of dried effluent was not successful
• Sequential batch reactor need to be demonstrated at pilot
plant scale
• Simplified induced blanket reactor need to be tested with
swine manure.
• Anaerobic digestion of combinations of manures is
economic with the addition of iron compounds

27. Literature
W.J. Oosterkamp 2017 “Progress in anaerobic digestion of manures”
submitted for publication in Majid Hosseini ed. “Handbook of
Biotechnology for Renewable Fuels, elsevier New York USA
W.J. Oosterkamp 2016 “Chicken manure digestion” accepted for publication in
Current Biochemical Engineering

28. Questions
• .

29. Freshness
• .