Importance of bacterial storage polymers in bioprocesses

In waste water treatment processes microorganisms are subjected to a feast and famine regime. For sequencing batch processes this is often even more pronounced. Based on literature reports and own research it is hypothesized that in general microorganisms respond to these feast-famine regimes by accumulating storage polymers (polyhydroxyalkanoates) when substrate is present. The storage polymers are used for growth when the external substrate is depleted. In this manner the organisms are capable to balance their growth. A general hypothesis explaining polymer formation is developed. The advantages and disadvantages of this formation of storage polymers for the operation of SBR processes is discussed.

[1]  J. J. Heijnen,et al.  A metabolic model for the biological phosphorus removal process , 1995 .

[2]  Thermodynamics of microbial growth and its implications for process design , 1994 .

[3]  Miroslav Macek,et al.  Bacteria and Protozoa Population Dynamics in Biological Phosphate Removal Systems , 1994 .

[4]  T. Mino,et al.  Role of glycogen in acetate uptake and polyhydroxyalkanoate synthesis in anaerobic-aerobic activated sludge with a minimized polyphosphate content , 1994 .

[5]  Tomonori Matsuo,et al.  Uptake of Organic Substrates and Accumulation of Polyhydroxyalkanoates Linked with Glycolysis of Intracellular Carbohydrates under Anaerobic Conditions in the Biological Excess Phosphate Removal Processes , 1992 .

[6]  M. Pagni,et al.  Linear growth and poly(beta-hydroxybutyrate) synthesis in response to pulse-wise addition of the growth-limiting substrate to steady-state heterotrophic continuous cultures of Aquaspirillum autotrophicum. , 1992, Journal of general microbiology.

[7]  Mogens Henze,et al.  Activated Sludge Modelling and Simulation , 1991 .

[8]  M. Wentzel,et al.  Metabolic behaviour of Acinetobacter spp. in enhanced biological phosphorus removal - a biochemical model , 1986 .

[9]  J. Chudoba,et al.  Control of activated sludge filamentous bulking: experimental verification of a kinetic selection theory , 1985 .

[10]  J. Chudoba,et al.  Control of activated-sludge filamentous bulking–II. Selection of microorganisms by means of a selector , 1973 .

[11]  M. Doudoroff,et al.  THE ROLE OF ORGANIC SUBSTRATES IN BACTERIAL PHOTOSYNTHESIS. , 1959, Proceedings of the National Academy of Sciences of the United States of America.