GreenStart's mission is to foster a resilient energy and food system for New Hampshire by providing technical education and practical agricultural examples. An educational non-profit organization established in 2006, GreenStart sees food and fuel security as the end-product of a vibrant, sustainable agriculture system in New Hampshire.
New Hampshire has 40% of its land area in agricultural soils, yet farms only 10% and imports 95% of its food and fuel. New Hampshire has no significant petroleum resources. To feed and fuel itself from sustainable natural resources, New Hampshire must improve its soils while also improving production.
To achieve this end, GreenStart facilitates projects that
1) increase soil carbon “banking”
2) decrease energy inputs
3) increase both food and fuel outputs (positive energy and carbon balance)
4) promote “tight” cycling of nutrients
5) provide opensource access to appropriate knowledge, seeds and equipment
Hi Sam - there are several that have been experimented in within the community but a tool wiki has yet to be created to document them. Your post is a good reminder to get it done! I have the expeller screws which I have been hoping to scan as a 3D model for folks to share and study, but i have not done it yet. The most common around here is are the small Anyang (AGICO) Chinese based presses and the German kernkraft. I have most of my experience with both the 1 ton/day and 6 ton per day chinese models pressing sunflower and canola - the models I have worked with came from http://www.ayimpex.com/Oil-Milling-Machinery/6YL-Series-Oil-Press.html . The Chinese ones are more of a hack because, although they work well, are really much nicer if they are disassembled, sand blasted, repainted and repowered for 220 or US three phase - which is worth doing when they start out at 1/4 or less of the price of the others. I think i got my first one for less than $1000 delivered to the US. You can see a nice comparison of European models in a review done by UVM of small scale presses. here: http://www.extension.org/sites/default/files/2014%20-%20Callahan%20et%20...
Happy to answer questions, and help with documentation!