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Acid pre-treatment of sewage anaerobic sludge to increase hydrogen producing bacteria HPB: effectiveness and reproducibility

descriptionPublicationkeyboard_double_arrow_right Article , Journal 01 Oct 2008 Italy Publisher:IWA PublishingJournal:Water Science and Technology, volume 58, pages 1,623-1,628 (issn: 0273-1223, eissn: 1996-9732,

Authors: TOMMASI, TONIA; SASSI, Guido; RUGGERI, Bernardo;

doi: 10.2166/wst.2008.506

pmid: 19001717

handle: 11583/1857162

Acid pre-treatment of sewage anaerobic sludge to increase hydrogen producing bacteria HPB: effectiveness and reproducibility

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Abstract

The present study is aimed to test the effectiveness and the reproducibility of the acid pre-treatment of sewage sludge to suppress the methanogenic bacteria activity, in order to increase the hydrogen forming bacteria activity, mainly Clostridium species. The treated sludge has been tested on glucose reach medium under mesophilic conditions (35°C), in batch mode to quantify the biological fermentative hydrogen production. In the whole series of experiments, the main components of biogas are hydrogen (52–60%) and carbon dioxide (40–48%); no methane and hydrogen sulphide were present in it. The rate of biogas production reached a maximum of 75 ml/lh. An overall mean hydrogen conversion efficiency was 11.20% on the assumption of maximum of 3 mol H2/mol glucose. Clostridium spp. multiplied ten times after 10 h of fermentation and over that thousand times at the end of fermentation.

Country

Italy

Related Organizations

Polytechnic University of Turin
Italy

Keywords

Clostridium, Sewage, Reproducibility of Results, Hydrogen-Ion Concentration, Models, Biological, Kinetics, Anaerobiosis, Oxidation-Reduction, Hydrogen

Impact byBIP!

	citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).	21
	popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.	Top 10%
	influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).	Top 10%
	impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.	Average