Browsing by Author "Lee, Byung Joon"

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    Batch test for measurement of ordinary heterotrophic organism active biomass in activated sludge mixed liquor
    (2002) Lee, Byung Joon
    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).