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Analysis of methods for determining DPAO fraction in phosphorus accumulating organisms

100%

Cyganecka A. , Podedworna J. , Zubrowska-Sudol M.

nr 2

We attempt to answer the question whether it is possible to directly compare the results of phosphorus uptake batch tests (PUBT) conducted by researchers who use different methods of determining the DPAOsto-PAOs ratio. This issue is raised because personally obtained results clearly show that DPAO fractions calculated with various methods proposed in the literature differ significantly. In the article the factors influencing the results of PUBT are discussed in detail. The study demonstrated that errors in determined values of DPAO fraction may be caused by the invitation of inappropriate value of reduction coefficient for anoxic conditions (η). The conclusion is that the η value should be accurately estimated in each test, independently for every active sludge.

Usuwanie azotu ze ścieków w procesie denitryfikacji defosfatacyjnej

100%

Cyganecka A. , Podedworna J. , Żubrowska-Sudoł M.

2008

tom Nr 12

23-27

The process' idea, its advantages and disadvantages. Factors influencing efficiency of de-phosphatizing de-nitrification. Technological systems: with divided bio-mass for the de-phosphatizing de-nitrification process and for nitrification process. Examples of A2N type systems' configurations.