有氧粒化技术基础应用废水处理(4)
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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