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Alternative Biological Treatment of Manure M. E. de Haro Martí, M. Chahine, and S. St Hilaire.

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Presentation on theme: "Alternative Biological Treatment of Manure M. E. de Haro Martí, M. Chahine, and S. St Hilaire."— Presentation transcript:

1 Alternative Biological Treatment of Manure M. E. de Haro Martí, M. Chahine, and S. St Hilaire

2 Today’s presentation  Manure treatment using Black Soldier Flies  Black Soldier Fly research in southern Idaho  Worm composting, how it works  Examples of working systems  Future of alternative biological systems in southern Idaho

3 Black Soldier Fly (BSF)  Hermetia Illucens  Naturally occurring in southern USA, Central and South America  Considered non-pest  Larvae are voracious organic matter eaters  As adults they don’t feed on live or decaying organic matter (no working mouth parts)

4 How Black Soldier Flies work?  In nature, adults lay eggs mostly in manure (preferred), worm composting, decaying corpses, undisturbed garbage (less preferred)  Larvae feed in the organic matter reducing its volume by 40 to 50%  Larvae goes trough six instars  When reaching the pupae stage they migrate from the feeding area looking for a dry and protected place to finalize pupation

5 BSF research in southern Idaho  Three years WSARE grant (UI, ISU) Two years lab research (ISU, Pocatello) One plus year of research within fish industry application (UI, Hagerman) One year on-farm trial (Dairy in Buhl)  Results from research are very promising  More on-farm trials needed to achieve a working systems for dry and cold climates

6 BSF research in southern Idaho Research results in southern Idaho showed:  BSF 40% protein and 30% fat content make it an excellent feed source for salmon and trout  Dried or frozen pupae has a long shelf life  BSF fed with fish offal has higher omega 3 fatty acids content  BSF can comprise an important part of the fish feedstock in local hatcheries  No after taste in fish fed with BSF

7 Research results in southern Idaho showed:  BSF larvae can reduce volume of dairy manure by 50% and DM solids weight by 40%  Important waste nutrient reduction (table)  Takes care of separated solids as well as fish offal (two waste streams become feedstock!)  In ID they need to be fed fish offal to reach pupation stage faster  Cold nights significantly reduce BSF activity  Good results even under adverse environmental and working conditions

8 Item Pre-processed manure (Kg) Post- processed by- product (Kg) Net reduction (%) Weight, DM Total N Total P Carbon Ash Nutrient Reduction in Manure Processed by Black Soldier Fly

9 Events time line

10 Fish offal addition

11 Two days after fish offal addition

12 Black Soldier Fly Larvae at work two days after fish offal addition

13 Vermicomposting  Composting with worms  Half dozen different species of earthworm are used  Eisenia fetida most common  Naturally occurring around the world  They are scavengers and decaying organic matter eaters (vegetal materials)

14 Vermicomposting  Vermicomposting has been used to process different types of wastes for many years  Effective but slow process  Reduce volume by 40% to 50%  Castings have excellent properties as fertilizer and soil amendment  Worms can be commercialized in diverse ways  On-farm and municipal scale facilities exist and have diverse grades of success

15 Using Vermicompost Turnips: 0%, 10%, 20% vermicompost by volume added to field plots, Biological & Agricultural Engineering, NC State University

16 Vermicomposting examples Queensland, Australia Tarboro, NC Swine manure Geneseo, NY Dairy manure

17 UI research and Extension 2010  Pilot project to test a worm composting unit designed in Gooding, ID  Collaboration with local high school and designer company

18 Alternative biological systems in southern Idaho - challenges  Black Soldier Fly and Vermicomposting systems have similar challenges in the area  Creating a suitable environment to operate year round is the most challenging technically and economically  They can handle just part of the dairy and fish industry waste streams  By products are of relatively high value  More market assessment needed

19 Challenges and answers  Suitable farm scale systems for BSF and vermicompost need to be developed more  Producers and market acceptability needs to increase  More funding is necessary to develop research on farm-scale initiatives and adaptation to our geographical area  Capacity to be a sustainable and profitable part of dairy and waste management operations

20 Questions?


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