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Biogas from anaerobic digestion Biogas potential & digester

Biogas from anaerobic digestion Biogas potential & digester. By Jin Mi Triolo & S. G. Sommer University of Southern Denmark. Biogas knowledge pyramide. The world markets for biogas. European biogas sector - thousands of biogas installations,

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Biogas from anaerobic digestion Biogas potential & digester

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  1. Biogas from anaerobic digestionBiogas potential & digester By Jin Mi Triolo & S. G. Sommer University of Southern Denmark

  2. Biogas knowledge pyramide

  3. The world markets for biogas European biogas sector - thousands of biogas installations, - Germany, Austria, Denmark and Sweden : the technical forerunners with the largest number of modern biogas plants) Asia -Small-scale biogas plants -Simple technologies, and therefore cheap to construct Vietnam - 200 thousand rural household biogas digester China - 30 million rural household biogas digesters India - 5 million

  4. Biogas production in Europe 50% of landfill methane is produced in UK

  5. Global potential of biogas production • Very small part of this potential is utilized today • European Biomass Association (AEBIOM) • The largest potential lies in biomass originating from agriculture. • Up to 20 to 40 million hectares (Mha) of land can be used for energy production in the European Union alone, without affecting the European food supply.

  6. Family scale biogas plants (very small scale) • Nepal, China or India operate millions of family scale biogas plants • Utilizing very simple technologies. • Feedstock :the household and/or their small farming activity • Biogas is used for the family cooking and lighting needs. • no process heating (psychrophilic or mesophilic operation temperatures)long HRT.

  7. Rural biogas reactor types a) Chinese type b) Indian type (ANGELIDAKI 2004)

  8. Run the digester • Construct the digester, no leaks • Fill it ca. half with biomass from another or with sludge from bottom of ponds (short time in air – no oxygen) • Add slurry – daily 1/30 of the volume of the digester (Hydraulic retention time), if temperature is low.

  9. Large Biogas plants Horizontaldigester, built in Denmark (Nordisk Folkecenter 2001) Vertical digester in Germany (KRIEG AND FISHER 2008)

  10. Large biogas plants Picture of farm scale biogas plant in Denmark co-digesting animal slurries and energy crops (GROENGAS A/S)

  11. Very lager and Centralised co-digestion plants • Digesting animal manure and slurries, collected from several farms • Centrally located in the manure collection area. • Co-digest animal manure with a variety of other suitable co-substrates (e.g. food- and fish industries) • Largely applied in Denmark size from 550 m3 to 8500 m3 treat1.2 million tons of animal slurry every year with 325.000 tons of other kinds of organic waste (Vietnamese digester 10 m3) • HRT :12-25 days • Controlled sanitation process

  12. Centralised co-digestion plants Schematic representation of the closed cycle of centralised anaerobic digestion (AL SEADI 2001)

  13. Centralised co-digestion plants Centralised co-digestion plant in Denmark (LEMVIG BIOGAS)

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