Ref ID : 932
J.M. Krul; Activity of Zoogloea ramigera growing in flocs and in suspension. Water Research 11:45-50, 1977
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A comparison was made between cells of Zoogloea ramigera occurring in flocs and in suspension. Suspended cells were obtained by adding cellulose to the growth medium, which prevented floc formation without damaging the cells. Differences in protein synthesis and poly-beta-hydroxybutyrate production of cells in suspension and cells in flocs were only found between slowly shaken cultures. Increasing the oxygen content of such cultures did not raise the growth limitation of the cells in flocs. The oxygen uptake of the suspended cells was found to represent a zero order reaction at an oxygen concentration of the culture above 0.1 mg/l. and that of cells in flocs above 1.5 mg/l. Below 20 mg/ml glucose the glucose respiration rate of cells in flocs was lower than that of suspended cells. Above approx. 20 mg/l. glucose, the glucose respiration of both types of cells was almost a zero order reaction.