Figure 4

From: Integrative microbial community analysis reveals full-scale enhanced biological phosphorus removal under tropical conditions

Figure 4

The effect of (A) decrease in dissolved oxygen concentration in the aerobic zone on the (B) phosphate and nitrogen removal efficiency at Ulu Pandan South Works and the specific phosphate and acetate uptake activity of Ulu Pandan biomass determined in lab–scale batch experiments conducted with freshly collected full–scale plant biomass; (C) community composition (operational taxonomic units (OTU) defined by 16S rRNA gene amplicon sequencing data); and (D) poly–β–hydroxyalkanoate (PHA) content and ratio and glycogen content in the biomass throughout the two month sampling period between the 29th May–14th August 2013. Relative abundances of OTUs in (C) are plotted on a square root scale; OTUs annotated to Accumulibacter PAO and Competibacter GAO are highlighted. Dashed line indicates the sampling point when dissolved oxygen was decreased in the aerobic zone of Ulu Pandan South Works.