Co-digestion of Different Biomass Materials

This blog recently posted a brief comparison of waste streams as feedstock for the production of bio-gas or derivatives that concentrate the methane as a fuel source. The biopact team now reports that an experimental biogas complex was inaugurated last month in Denmark at Aarhus University1.

Oscar Meyer Wiener Mobile

Now they tell me! Boy, do I feel like so much Dissolved Air Flotation Sludge. Here I’m thinking that After Gutenberg could be the DFIBG (Doktor Frank N. Furter of Information on Bio-gas) and Minister of Agriculture Eva Kjer Hansen commemorated new facilities with four (Count them, Four!) experimental reactors…

Each with their own holding tanks as well as a dosage system for adding different feeds of solid material such as leftover animal feed, deep straw manure, energy crops and other biomass materials.

Biopact informs that approximately 29,000 tonnes slurry and 2,000 tonnes biomass from the barns and fields at Foulum will provide feedstock for the anaerobic digestion facility.

European Bio-gas Production


According to a recent EU Biogas Barometer2 reading, “Denmark leads in developing biogas technologies for co-digestion of different biomass materials.”

Our ambition is that the new biogas plant will contribute to bringing Denmark to the global forefront in the area of [research into] consumption of energy and nutrients from animal manure and other types of biomass.

- Minister of Agriculture Eva Kjer Hansen

Is that a moving speech, or what? Since this blog contends that the United States needs to greatly improve combined heat and power from bioenergy, particularly in the Southeastern states. it is forthwith recommending a visiting scholars program, so that our ag students could learn from Aarhus Faculty of Agricultural Sciences about European research and development with feedstock, nutrients, and production processes.

The Biopact post advocates anaerobic digestion of animal manure. A biogas plant prevents “leaching of nutrients to the aquatic environment.” Using the animal manure as a feedstock also can prevent the release of methane into the atmosphere, not to mention odour problems, when manure is spread on fields. Rather than the public incurring the problems of livestock operations, or the operator incurring the expense of proper waste disposal, the material enters into biogas production.

Indeed, the Biopact team reports that bio-gas “can yield more energy than any other current type of biofuel. The green gas can be made from a very wide range of biomass crops as well as from abundant crop residues.” With the many proposals to improve biogas production, there is a need to test under practical conditions the various methods scientifically.

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