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Application of novel analytical and investigative methods such as
fluorescence in situ hybridization, confocal laser scanning
microscopy (CLSM), microelectrodes and advanced numerical simulation
has led to new insights into micro- and macroscopic processes in
bioreactors. However, the question is still open whether or not
these new findings and the subsequent gain of knowledge are of
significant practical relevance and if so, where and how. To find
suitable answers it is necessary for engineers to know what can be
expected by applying these modern analytical tools. Similarly,
scientists could benefit significantly from an intensive dialogue
with engineers in order to find out about practical problems and
conditions existing in wastewater treatment systems. In this paper,
an attempt is made to help bridge the gap between science and
engineering in biological wastewater treatment. We provide an
overview of recently developed methods in microbiology and in
mathematical modeling and numerical simulation. A questionnaire is
presented which may help generate a platform from which further
technical and scientific developments can be accomplished. Both the
paper and the questionnaire are aimed at encouraging scientists and
engineers to enter into an intensive, mutually beneficial dialogue.
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