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4119335 
Journal Article 
Competition between polyphosphate and polysaccharide accumulating bacteria in enhanced biological phosphate removal systems 
Cech, JS; Hartman, P 
1993 
1 
Water Research
ISSN: 0043-1354
EISSN: 1879-2448 
BIOSIS/93/22504 
27 
7 
1219-1225 
English 
WOS:A1993LF18000014 
BIOSIS COPYRIGHT: BIOL ABS. The competition between polyphosphate accumulating bacteria (PP bacteria) and another group of microorganisms (tentatively named "G bacteria") has been observed in laboratory sequencing batch reactors exhibiting enhanced biological phosphate removal (EBPR). The "G bacteria", which accumulate polysaccharide instead of polyphosphate, were able to dominate the anaerobic-oxic system even though acetic acid was readily available. When acetate was used as the sole source of organic carbon in an anaerobic-oxic sequencing batch reactor, however, PP bacteria successfully competed for acetate with "G bacteria". The molar ratio of phosphate released to acetate taken up in the anaerobic stage varied from 0 to 0.78 and depended on the ratio of the numbers of PP bacteria to "G bacteria" in the activated sludge. 
ACTIVATED SLUDGE; PHOSPHATE REMOVAL; POPULATION DYNAMICS; BACTERIA; POLYPHOSPHATE; POLYSACCHARIDE