Capitalizing On Digester Coproducts
An add-on process for nutrient recovery from digested effluent yields phosphorus (left) and nitrogen (right).

Nutrient management, demand for organic fertilizers and the need for non-energy revenue streams are driving development of high-value coproducts using digestate.
Peter Gorrie
BioCycle August 2014, Vol. 55, No. 7, p. 48

Creating A Solid Base For Digestate Use In The United Kingdom
The UK government’s “Anaerobic Digestion Strategy and Action Plan” annual report recognizes the value of digestate: “When used effectively and appropriately, it is a valuable fertilizer which can directly replace other inorganic fertilizers.” An example of liquid digestate application on cropland is shown. (Photos courtesy of John Rennie & Sons and Bryan Lewens.)

Policies are in place to stimulate development of digestate markets across the United Kingdom. Research provides strong support but challenges still remain.
David Riggle
BioCycle October 2012, Vol. 53, No. 10, p. 44

 

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University Pioneers Dry Fermentation
University of Wisconsin in Oshkosh fermenters, percolate tank, biogas collection

To help achieve its goal of energy independence, the University of Wisconsin in Oshkosh invested in a high solids, dry fermentation anaerobic digester to process source separated organics.

Nora Goldstein
BioCycle February 2012, Vol. 53, No. 2, p. 35

 

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