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Fermentative production of biohydrogen from organic raw and waste materials

SUMMARY:
Hydrogen (H2) is considered as an energy source for the future. Laboratory tests for the fermentative production of biohydrogen were conducted in two test systems (500 ml Sensomat System and 30 l CSTR) at a thermophilic temperature of 60 °C and in batch operation. For inoculation of the process, heat pretreated sewage sludge as a mixed culture of natural anaerobes was used.

The highest specific hydrogen production of 280 Nl H2/kg VSS (yield of 56 % and 112 %, resp.) was achieved in the CSTR at pH 5.5 using glucose as substrate. The values of hydrogen produced from corn- and potato starch were 211 Nml H2/g VSS (yield 75 %) and 123 Nml H2/g VSS (yield 67 %), respectively. The agricultural products sugar beet (192 Nml H2/g VSS, yield 70 %) and fodder beet (185 Nml H2/g VSS, yield 65 %) demonstrated a high potential for the production of biohydrogen. Likewise, the substrates potato, turnip, corn as well as the biowaste potato peels showed promising hydrogen productions with yields of 60 %, 50 %, 49 % and 30 %, respectively.

Copyright:	© European Compost Network ECN e.V.
Quelle:	Orbit 2006 (September 2006)
Seiten:	9
Preis:	€ 4,50
Autor:	Dipl.-Ing. Dorothea Rechtenbach Dipl.-Ing. Mareike Meyer Prof. Dr.-Ing. Rainer Stegmann
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