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Fundamental and application of aerobic granulation technology for wastewater treatment(4)

Source: | Date: 2011-05-14 | Hits:
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Factors affecting aerobic granulation 

Composition of substrate 

The cultivation of aerobic granules have been reported using  various substrates including glucose, acetate, ethanol,

phenol, and synthetic wastewater (Beun et al., 1999; Peng et al., 1999; Tay et al., 2001a; Moy et al., 2002; Jiang et

al., 2002; Schwarzenbeck et al., 2003). Aerobic granules have been also cultivated with nitrifying bacteria and an 

inorganic carbon source (Tay et al., 2002b; Tsuneda et al., 2003). These nitrifying granules showed excellent

nitrification ability. Aerobic granules were also successfully cultivated in laboratory-scale SBR for treating 

particulate organic matter rich wastewater (Schwarzenbeck et al., 2003). In recent years it was studied that the

feasibility of aerobic granular sludge formation on domestic sewage occurs in a SBR system as a logical step in the

scaling-up process (De Kreuk and van Loosdrecht, 2006). The glucose-fed aerobic granules have exhibited a

filamentous structure, while acetate-fed aerobic granules have had a nonfilamentous and very compact bacterial

structure in which a rodlike species predominated. It suggested that granule microstructure and species diversity 

depend on the type of carbon source.  

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