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- W2355143331 abstract "Storage of internal polymers is considered one mechanism for the removal readily biodegradable organic matter for microorganisms under dynamic (transient) conditions and this phenomenon is very important for substrate competition of different cultures under transient conditions. In this study,anoxic granular sludge was successfully cultivated with acetate as substrate under anoxic conditions in an SBR and the processes of acetate consumption,storage and utilization of the internal polymer,poly-β-hydroxy butyrate (PHB),were studied. Denitrobacteria used the acetate substrate in a storage mechanism process. The PHB content of granular sludge initially increased while substrate was available and than decreased in the following substrate-deficient stage of the daily operation cycle. The PHB content could reach as high as 0.75%~1.0% of the biomass by the end. During the PHB synthesis phase,ΔPHB/ΔCOD(YSTOD) was 0.39,the maximum synthetic rate was 0.124 g·g-1·h-1 and storage or utilization of PHB could be reflected indirectly by the ratio ofΔCOD/ΔNOx-N. When the substrate load was raised such that the COD/NO-3-N(C/N) ratio was 5,the PHB content of the biomass showed a trend very similar to that of the typical daily operation cycle and YSTOD was 0.35~0.25. When C/N ratio was increased to 7.5,concentrations of PHB were raised continually until the end of denitrification and YSTOD was 0.38~0.45 due to sufficient substrate supply." @default.
- W2355143331 created "2016-06-24" @default.
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- W2355143331 date "2011-01-01" @default.
- W2355143331 modified "2023-09-23" @default.
- W2355143331 title "Storage and utilization of poly-β-hydroxybutyrate under denitrification in an anoxic granular sludge SBR" @default.
- W2355143331 hasPublicationYear "2011" @default.
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