Cavitation for improved sludge conversion into biogas

Title

Cavitation for improved sludge conversion into biogas

 Author

Stoop, A.H.
Bakker, T.W.
Kramer, H.J.M.

Faculty

Mechanical, Maritime and Materials Engineering

 Department

Process and Energy

 Date

2015-12-31

 Abstract

In several studies the beneficial influence of pre-treatment of waste activated sludge with cavitation on the biogas production was demonstrated. It is however, still not fully certain whether this effect should be mainly contributed to an increase in conversion rate of organics into biogas by anaerobic bacteria, and how much cavitation increases the total biogas yield. An increase in yield is only the case if cavitation can further disrupt otherwise inaccessible cell membrane structures and long chain organic molecules. In this study the influence of hydrodynamic cavitation on sludge that was already digested for 30 days was investigated. The total biogas yield could indeed be increased. The effect of the backpressure behind the venturi tube on the yield could not yet be established.

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 Publisher

IOP Publishing

 ISSN

1742-6588

 Source

Journal of Physics: Conference Series 656, (2015)

 Part of collection

Institutional Repository

 Document type

conference paper

 Rights

(c) 2015 The Authors,
CC BY. Creative Commons Attribution 3.0 licence. Published under licence by IOP Publishing Ltd
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