Batch test for measurement of ordinary heterotrophic organism active biomass in activated sludge mixed liquor
Master Thesis
2002
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University of Cape Town
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Abstract
To aid the design and operation of the single sludge activated sludge system, over the past three decades a suite of steady state design models (e.g. WRC, 1984; Wentzel et al., 1990; Maurer and Gujer, 1994) and kinetic simulation models (e.g. Dold et al., 1980, 1991; Van Haandel et al., 1981; Henze et al., 1987; Wentzel et al., 1992; Henze et al., 1995) have been developed. In the development of these models, it was recognised that it would not be possible t incorporate the behaviour of specific microorganism species - the mixed liquor in the activated sludge system contains a wide diversity of different micro organisim species, the mixed liquor in the activated sludge system contains a wide diversity of different micro organism species, some of whom for which identification techniques have only recently started becoming available. Instead, micro organsims that fulfil a particular function in the activated sludge system (e.g. aerobic degradation of organics) are grouped together as a single entity, which has been called a "surrogate" organism. This surrogate organism is assigned a set of unique characteristics that reflect the behaviour of the group, but may not reflect the characeristics of any indvidual organism or species of organisms in the group. A similar approach has been adopted for the "non-organism" components of the activated sludge mixed liquor, e.g. inert organcs. Together, the surrogate organism and non-organism groups make up the activated sludge mixed liquor organic (volatile) suspended solids (MLOSS).
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Includes bibliographical references.
Reference:
Lee, B. 2002. Batch test for measurement of ordinary heterotrophic organism active biomass in activated sludge mixed liquor. University of Cape Town.