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| Simulation of biogenic sediment stabilisation by heterotrophic bacteria in an annular flume |  |
| Prochnow, J.; Schweim, C.; Koengeter, J. (2002). Simulation of biogenic sediment stabilisation by heterotrophic bacteria in an annular flume, in: Winterwerp, J.C. et al. (Ed.) (2002). Fine sediment dynamics in the marine environment. Proceedings in Marine Science, 5: pp. 393-407 |
| In: Winterwerp, J.C.; Kranenburg, C. (Ed.) (2002). Fine sediment dynamics in the marine environment. Proceedings in Marine Science, 5. Elsevier: Amsterdam. ISBN 0-444-51136-9. XV, 713 pp., meer |
| In: Proceedings in Marine Science. Elsevier: Amsterdam. ISSN 1568-2692, meer |
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| Author keywords |
biogenic stabilisation; EPS; annular flume; activated sludge; FISH |
| Abstract |
The stabilising effect of assemblages of blue-green algae and diatoms on cohesive sediments in shallow estuarine waters has been investigated in detail for a number of years now. These biofilms can decrease the roughness and hence the erodibility of fine materials. In the case of sediments in reservoirs the occurence of phototrophic biogenic stabilisation is unlikely because the amount of sunlight penetrating the upper layers of the water body is too small to enable phototrophic growth. On the other hand information on heterotrophic sediment stabilisation is still lacking. This paper describes an experimental setup suitable for the simulation of heterotrophic stabilisation of cohesive sediments in the lab. It features annular flume tests and the use of surrogate materials (china clay, activated sludge, silica flour). The use of the FISH-technique (in situ hybridisation with fluorescent-labelled genetic probes) for the identification of more or less active bacteria in sediments is discussed. |
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