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Biological waste treatment at Lindum
Jan Petter HammerSubject Manager Chemistry/Biology
Presentation forAquateam with Polish guests
Lindum, 28. september 2009
Norway’s “Agenda 21”
• Recycling of nutrients• Local treatment favorized• Nutrients are recycled to where the food is being produced
Biological treatment
1) CompostingAerobic degradation
C6H12O6 + O2 CO2 + H2O
2) biogas productionAnaerobic degradation
C6H12O6 3 CH4 + 3 CO2
Composting methods at Lindum
• Windrow composting• Matress composting• Reactor composting• Active large windrow composting• AGBAG-kompostering
Important criteria
• The structure needs to be shredded to the right size• The mixture must be able to drain moisture and be
aerated• The mixture must have DM>30%• C/N-factor• Starting pH > 5• Energy must be removed in the process• Optimal degradation at 50-55 ⁰C
Process and quality control
• Temperature
• CO2, CH4 and O2
• DM• Odour• Energy
development• Volume reduction
• Hygiene: TKB and Salmonella
• Stability: SOUR test, ”rottegrad”
• Analysis of nutrients• Declaration
Soil products at Lindum
• Ecologial compost• Agricultural compost• Bulk soil mixtures• Bagged soil mixtures• Garden waste compost• Biological roof covers• Designed products for
customers
…. and the composting starts
Air is forced through the compost mixture, and it is turned several times each day.
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