animal protein production from waste and manure
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Production of Biomass from Organic Waste
Cecilia Lalander
Project members: Björn Vinnerås, Allan Komakech
From Waste to Value
Treatment aim
Short-cut route in agriculture
Higher use of manure resources
Generate animal protein for use in animal feed
Improve hygienic quality
Kampala is the home of - 4,000 cows - 3,000 goats - 9,000 pigs - 250,000 chickens - 1,300,000 people
60% of all manure dumped or discarded
Vermicomposting system
High mass reduction
Inactivate pathogens?
Worms — 70% protein
NH3 sensitive
Manually harvested
Low maintenance
Vermicomposting unit
1 x 1 x 0.3-1.5 m
Vertical system
2-3 000 worms to start-up
Run by a farmer at the Makere test farm — Eudrilus eugeniae (African nightcrawler)
Feeding ~5 kg m-2 day -1
Accumulate less than 0.5 cm day-1
Mass flow in unit
4 months feeding — 500 kg
>16 000 worms — >20 kg feed
Feed to biomass conversion rate 4.5%
Material degradation — 36 % into CO2
— 60 % reduction
Biomass and fertiliser
BSF system
Experimental set-up
BSF treatment
Faeces BSF
larvae Indicators and pathogens
a) Salmonella Typhimurium
b) Enterococcus faecalis
c) Bacteriophage φX174
d) Ascaris suum eggs
Prepupae Analysed for
pathogen and indicator precence
Residue Pathogen and indicator concentrations monitored as a function of time
Reduction of pathogens
Inactivation in BSF-treatment unit (squares) compared to storage (triangles)
Salmonella spp. Enterococcus spp. фX174
d) No reduction in concentration of Ascaris suum eggs No effect on the inactivation of Ascaris suum eggs
C. Lalander, S. Diener, M. E. Magri, C. Zurbrügg, A. Lindström, B.
Vinnerås, Science of the Total Environment 2013, 458–460, 312-318.
Effectiveness BSF-treatment
Dry Mass Reduction — 73%
Salmonella spp. — 7 log10 reduction
Post-treatment of residue — Ammonia sanitisation
Processing prepupae — Drying
In the process
Summary
High protein production — 4.5% - 10% feed to biomass
conversion
Greatly reduced waste amount — 60-75% reduction
Inactivation of some critical bacterial pathogens — Salmonella spp.
Reduced need for land application of fertiliser — Short-cut in nutrient recycling
Publications from project Information brochure for
farmers
MSc — 1 Finalised — 1 On-going
Papers — 1 Published — 2 Accepted — 1 Submitted — 2 Manuscripts
Other — 1 Newspaper article UNT — 2 Local radio interviews
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