http://en.jaas.ac.cn/upload/20140104/ylz009.pdf

Mechanisms of removing pollutants from aqueous solutions by microorganisms and their aggregates: A review

Biological hydrolysis and acidification of sludge under anaerobic conditions : The effect of sludge type and origin on the production and composition of volatile fatty acids

Anaerobic/oxic/anoxic granular sludge process as an effective nutrient removal process utilizing denitrifying polyphosphate-accumulating organisms.

Simultaneous nitrogen and phosphorus removal by a novel sequencing batch moving bed membrane bioreactor for wastewater treatment.

The significance of salinity in shaping bacterial communities dwelling in estuarine areas has been well documented. However, the influences of other environmental factors such as dissolved oxygen and nutrients in governing bacterioplankton communities inhabited in local estuarine regions remain elusive. Here, bacterioplankton community structure of surface and bottom waters from eight sites along Pearl Estuary were characterized with 16S rRNA genes pyrosequencing. The bacterioplankton community dendrogram partitioned the samples into three groups, i.e., whole water column of freshwater sites, surface water of saltwater sites and bottom water of saltwater sites. In the saltwater sites, Synechococcus dominated the surface water while Oceanospirillales, SAR11 and SAR406 were prevalent in the bottom water. Betaproteobacteria was abundant in the freshwater sites, with no significant difference between water layers. Moreover, occurrence of phylogenetic shifts in taxa affiliated to the same clade was also detected. Dissolved oxygen explained most of the bacterial community variation in the redundancy analysis targeting only freshwater sites, whereas nutrients and salinity explained most of the variation across all the samples in Pearl Estuary. Methylophilales (mainly PE2 clade) was positively correlated to dissolved oxygen, whereas Rhodocyclales (mainly R.12up clade) was negatively correlated. Moreover, high nutrient inputs to the freshwater area of Pearl Estuary have shifted the bacterial communities towards copiotrophic groups, such as Sphingomonadales. The present study provides a clear outline of bacterioplankton communities in two regions of a subtropical estuary and demonstrates that the overall nutrients and freshwater hypoxia play important roles in determining bacterioplankton compositions

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Phylogenetic shifts of bacterioplankton community composition along the Pearl Estuary: the potential impact of hypoxia and nutrients

Simultaneous nitrogen and phosphorus removal using denitrifying phosphate-accumulating organisms in a sequencing batch reactor

Characterization of denitrifying polyphosphate-accumulating organisms in activated sludge based on nitrite reductase gene

Selective enrichment of phosphate-accumulating organisms (PAOs) and denitrifying phosphate-accumulating organisms (DNPAOs) was conducted using a sequencing batch reactor (SBR). To elucidate biomarkers for DNPAOs, quinone profiles were monitored during selective enrichment. As a result, a high correlation between the mole fraction of ubiquinone with eight isoprene units (Q-8) and anoxic phosphate uptake ability was observed, indicating that Q-8 was one of the biomarkers for DNPAOs. In addition, the mole ratio of ubiquinones to menaquinones (Q/MK) increased throughout this selective enrichment.

Quinone Profiles Reflecting Population Dynamics of Denitrifying Phosphate-Accumulating Organisms

Selective cultivation of denitrifying phosphate-accumulating organisms (DNPAOs) was conducted using a sequencing batch reactor (SBR) under different electron acceptor conditions. A new biological nutrient removal process configured with anaerobic/aerobic/anoxic conditions was successfully operated in a single SBR. The supplementation of carbon substrate at the start of the aerobic condition was effective for the simultaneous removal of phosphorus and nitrate by DNPAOs.

/pdf/new-biological-nutrient-removal-process-using-denitrifying-50muz3ylx3.pdf

Takashi Ohno

Papers

Simultaneous nitrogen and phosphorus removal using denitrifying phosphate-accumulating organisms in a sequencing batch reactor

Characterization of denitrifying polyphosphate-accumulating organisms in activated sludge based on nitrite reductase gene

Quinone Profiles Reflecting Population Dynamics of Denitrifying Phosphate-Accumulating Organisms

New Biological Nutrient Removal Process Using Denitrifying Phosphate-Accumulating Organisms.