This paper presents a synthetic review of studies conducted recently and consolidated by other literature insights that substantiate a multilayer structured model of the population organization in the anaerobic granule. Syntrophic bacteria associations would be located between an external, predominantly acidogenic, layer including also H2-consuming bacteria, and an aceticlastic core. This was evidenced conjointly by electron microscopic observations of cross-cleaved granules, by the specific activity analysis of stepwise abraded granules and by the changes in the specific metabolic activities with granule size distribution and enlargement. Such a structure was deduced from observations of propionate degradation in spite of endergonic conditions in the bulk liquid, of the two-step transfer of CH4 and H2 from liquid to the gas bubbles and from a substrate and product diffusion model which differentiates active zones for trophic groups along the granule radius. Such a structured aggregate is a stable metabolic arrangement that creates optimal nutritional conditions for all its members.
Skip Nav Destination
Research Article| April 01 1992
A Structured Model of the Anaerobic Granule Consortium
S. R. Guiot;
Water Sci Technol (1992) 25 (7): 1–10.
S. R. Guiot, A. Pauss, J. W. Costerton; A Structured Model of the Anaerobic Granule Consortium. Water Sci Technol 1 April 1992; 25 (7): 1–10. doi: https://doi.org/10.2166/wst.1992.0133
Download citation file: