Regenerative Energie
Conventional H2 production methods are based on physico-chemical processes, such as waterelectrolysis or chemical cracking of hydrocarbons; however, in the perspective of reducing fossil fuels use and combustion, H2 production via biological processes is attractive. Biohydrogen can be generated by three microbial groups, namely (1) cyanobacteria which decompose water into hydrogen and oxygen in the presence of light energy by photosynthesis; (2) photosynthetic purple non-sulfur bacteria, which are heterotrophic microorganisms producing H2 under anaerobic conditions and in presence of light energy; (3) fermentative bacteria, primarily Clostridia, which produce H2 through dark fermentation.
In this experimental study a series of batch and semi-continuous experiments were carried out in order to investigate H2 production from piggery wastewater, organic fraction of solid waste and olive mill wastewater. Aerobic activated sludge from municipal wastewater treatment was used as the inoculum to supply biomass and adjust water content of mixtures. Piggery waste and solid wastes were mixed at different proportions with olive mill wastewater so as to evaluate the effect of substrate composition on H2 production. The effect of initial pH conditions and inoculum pre-treatment were studied as well. The results evidenced the main role played by pH conditioning and substrate composition, as well as, in some cases, by pre-treating of the inoculum.
| Copyright: | © IWWG International Waste Working Group |
| Quelle: | Workshop H (Oktober 2007) |
| Seiten: | 11 |
| Preis: | € 11,00 |
| Autor: | Giorgia de Gioannis E. Massi Anna Moreno Aldo Muntoni A. Polettini |
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Hochlauf der Wasserstoffwirtschaft
© Lexxion Verlagsgesellschaft mbH (8/2024)
Überblick über und Diskussion der Maßnahmen zum beschleunigten Ausbau
der Wasserstoffinfrastruktur in Deutschland
Die innerstaatliche Umsetzung des Pariser Klimaschutzübereinkommens
- ein Rechtsvergleich
© Lexxion Verlagsgesellschaft mbH (8/2024)
Like all public international law treaties, the Paris Climate Accords rely on national law for their implementation. The success of the agreement therefore depends, to a large extent, on the stepstaken or not taken by national governments and legislators as well as on the instruments and mechanisms chosen for this task. Against this background, the present article compares different approaches to the implementation of the Paris Agreement, using court decisions as a means to assess their (legal) effectiveness.
Klimaschutzrecht und Erzeugung erneuerbarer Energien in der Schweiz
© Lexxion Verlagsgesellschaft mbH (8/2024)
Verschachtelte Gesetzgebung unter politischer Ungewissheit