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Innovative technology for digestate management (USA)


Biogas is produced by anaerobic digestion that breaks down a biodegradable feedstock (such as wastewater treatment plant sludge, industrial food processing waste or slurry) into gas, water, and a solid waste termed digestate. The digestate is in the form of sludge sometimes called liquor. It is typically high in valuable nutrients such as nitrates and phosphates, but has a high water content that originates both from the moisture content of the original waste that was treated but also includes water produced during the microbial reactions in the digestion process. A consequence of the high water content is that transportation costs for removal of digestate are often enormous; companies may have to pay up to 25 Euros per tonne of digestate.

Source: Edie.net

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