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Some of Northern Tilth's recently completed projects include:
Spent Seaweed By-Product Recycling
Northern Tilth completed two years of agricultural and
topsoil blending field trials for FMC BioPolymer, a
carrageenan manufacturing plant that generates 23,000 tons
per year of Algefiber, a spent-seaweed by-product.
Prior to Northern Tilth's work, all of the Algefiber was
disposed in a local landfill. Based on the
field trials and extensive materials characterization, Northern Tilth
permitted and initiated a recycling program that will handle close to
100% of the material.
 
Development of a Water Treatment Residuals Recycling Program
In partnership with RMI, of Holderness, New Hampshire, Northern
Tilth implemented a pilot recycling project for an alum-based residual
from the Kennebunk, Kennebunkport and Wells Water District. The trial
demonstrated that the District's water treatment residual could be
successfully used as the mineral component in manufactured topsoil.
Based on results of the trial, Northern Tilth was able to obtain the
first water treatment residual recycling permit issued by the Maine
Department of Environmental Protection. The residual is now being
used by local contractors to improve the qualities of commercial topsoil.
 
Wood Yard Revegetation Project with Paper Mill Residuals
Northern Tilth developed recipes and obtained regulatory approval for a
Canadian paper mill working to revegetate a relict wood yard using a manufactured
topsoil blend consisting entirely of residuals generated by the mill. By-products
in the topsoil include paper mill sludge (short paper fiber), ash from the mill's
biomass plant, and partially decomposed wood from old hog fuel piles.
 
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