Competitive ability of amylolytic bacteria in activated sludge.
Shifts were induced into the microbial community of activated sludge by the pulse addition of soluble starch. The subsequent changes of amylolytic and proteolytic microbial populations were recorded. Four amylolytic strains were isolated and characterized with regard to carrying capacity, specific surface and growth kinetics. The competitive ability of these strains was studied by means of two-member competition experiments. These experiments were analysed according to the Lotka-Volterra model and the de Wit method. The different results obtained suggest that the dominance of the amylolytic Pseudomonas sp. (code 01) is based on a combined occurrence of high amylolytic activity, large relative cell surface, high maximum specific growth rate and reduced sensitivity towards associated proteolytic populations.
D000333:Aeromonas / Q000378:metabolism; D000681:Amylases / Q000096:biosynthesis; D001407:Bacillus / Q000378:metabolism; D001419:Bacteria / Q000378:metabolism*; D001673:Biodegradation, Environmental; D004463:Ecology; D008837:Micrococcus / Q000378:metabolism; D011506:Proteins / Q000378:metabolism; D011549:Pseudomonas / Q000378:metabolism; D012248:Rhodotorula / Q000378:metabolism; D012722:Sewage; D013213:Starch / Q000378:metabolism*
D011506:Proteins; D012722:Sewage; D013213:Starch; D000681:Amylases