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Home » BioRefineries, Energy, Federal Agency, Feedstock, Feedstocks, Field Crops, Forestry/Wood, Illinois, Methane/Biogas, Opinions, Policy, Process, R & D Focus, Sustainability

Argonne National Laboratory Develops New System to Enhance AD Process

Submitted by on March 7, 2017 – 3:30 pmNo Comment

(Bioenergy Insight)  US-based science and engineering centre Argonne National Laboratory has developed technology that synergistically uses two waste biomass streams to generate two bioproducts and enhance the process of anaerobic digestion (AD).

According to the organisation, the digestion of wastewater can be improved sludge by incorporating biomass-derived, carbon-sequestering char within the digester, thus creating pipeline-quality renewable natural gas while using the remaining biosolids for a high-quality fertiliser.

With funding from the US Department of Energy’s (DOE’s) Bioenergy Technologies Office (BETO) totalling $1.5 million (€1.42m) over three years, researchers at ANL said they have been able to develop and de-risk this technology, which is now ready for scale-up.

However, according to ANL by adding biochar directly to the anaerobic digester sequesters the CO2 and creates a biogas stream that is more than 90% methane and less than 5 parts per billion hydrogen sulphide, thus reducing the need for upgrading steps.

The biochar was also said to improve many of the operating conditions for AD, and furthermore, it is nutrient-rich, so the digestate left after the process is completed can serve as a high-quality fertiliser.  READ MORE

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