FERMENTATIVE HYDROGEN PRODUCTION FROM MIXTURE OF ORGANIC WASTES AND INCINERATION ASH

Japan has been generating municipal solid waste at an annual volume of approximately 50 million tones or more since 1989 (Ministry of the Environment, Japan, 2006). Degradation of garbage is achieved either physicochemically or microbially. Most household solid organic waste is incinerated and its residue, the ash, is disposed into the landfills at present. It is a lack of disposal capacity, however with final disposal site having an average capacity of only another 13.2 years. To solve the problem it is necessary to implement the waste recycling measures, taking into account the reduction of waste, reuse and prolongation of the life of products and parts, the recycling of waste, and the appropriate disposal as the final waste.

Most household solid organic waste in Japan is incinerated and its residue (i.e. ash) is disposed in landfills. If the anaerobic digestion from such organic wastes could be undertaken on a large scale, a simple and effective means of reducing the amounts of such organic waste would be possible. Anaerobic processes yielding significant amount of molecular hydrogen in the gas phase are referred to as hydrogen fermentation processes. We found that large amount of hydrogen gas can be generated when organic wastes and a certain type of incineration ash were held mixedly under anaerobic conditions although the mechanism of this phenomenon is unknown. We investigated whether hydrogen could be generated by biological or chemical processes from mixtures of the organic waste and incineration ash. Hydrogen production in culture was measured for combinations of five types of incineration ashes and a compost as the typical organic waste. A significant amount of hydrogen was generated only from the culture of the compost and the one among five of the tested incineration ashes (the KS ash).



Copyright: © IWWG International Waste Working Group
Quelle: Workshop H (Oktober 2007)
Seiten: 7
Preis inkl. MwSt.: € 7,00
Autor: H. Sawamura
Masato Yamada
Tomohiro Naruoka
Michihiko Ike
Ishigaki

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Leichtweiß-Institut
Physikalische und biologische
Aufbereitungs- und Behandlungs-
technologien, TU Braunschweig