Solid Retention Time Impact on Enhanced Biological Phosphorus Removal and Its Phosphorus Recovery Potential

2014 ◽  
Vol 2014 (9) ◽  
pp. 3827-3833
Author(s):  
Yueyun Li ◽  
Yuqi Wang ◽  
Helen Cope ◽  
Alistair Elfick ◽  
Annalisa Onnis-Hayden ◽  
...  
Keyword(s):  
Retention Time ◽  
Phosphorus Removal ◽  
Phosphorus Recovery ◽  
Enhanced Biological Phosphorus Removal ◽  
Biological Phosphorus Removal ◽  
Solid Retention Time ◽  
Recovery Potential ◽  
Biological Phosphorus

Effect of the anaerobic solids retention time on enhanced biological phosphorus removal

1994 ◽  
Vol 30 (6) ◽  
pp. 193-202 ◽  
Author(s):  
Yoshitaka Matsuo
Keyword(s):  
Retention Time ◽  
Phosphorus Removal ◽  
Continuous Flow ◽  
Phosphate Removal ◽  
Substrate Uptake ◽  
Enhanced Biological Phosphorus Removal ◽  
Biological Phosphorus Removal ◽  
Solids Retention ◽  
Biological Phosphorus ◽  
P Removal

Three continuous flow enhanced biological phosphorus removal (EBPR) systems were operated to investigate the effect of the anaerobic SRT on the phosphate removal. The P removal in the system with a short anaerobic SRT declined due to growth of non phosphate accumulating microbes which competed in anaerobic substrate uptake against polyphosphate accumulating bacteria. The phosphorus removal, however, was improved by extending the anaerobic SRT. Restoration and stabilization of P removal by the long anaerobic SRT were confirmed in two other systems.

scholarly journals Pushing the limits of solids retention time for enhanced biological phosphorus removal: process characteristics and Accumulibacter population structure

2020 ◽  
Vol 82 (8) ◽  
pp. 1614-1627
Author(s):  
Paul Roots ◽  
Alex Rosenthal ◽  
Yubo Wang ◽  
Fabrizio Sabba ◽  
Zhen Jia ◽  
...  
Keyword(s):  
Retention Time ◽  
Phosphorus Removal ◽  
Energy Recovery ◽  
High Rate ◽  
Stable Operation ◽  
Enhanced Biological Phosphorus Removal ◽  
Biological Phosphorus Removal ◽  
Solids Retention Time ◽  
Solids Retention ◽  
Biological Phosphorus

Abstract Reducing the solids retention time (SRT) of the enhanced biological phosphorus removal (EBPR) process can increase organic carbon diversion to the sidestream for energy recovery, thereby realizing some of the benefits of the high rate activated sludge (HRAS) process. Determining the washout (i.e. minimum) SRT of polyphosphate accumulating organisms (PAOs), therefore, allows for simultaneous phosphorus and carbon diversion for energy recovery from EBPR systems. However, few studies have investigated the washout SRT of PAOs in real wastewater, and little is known of the diversity of PAOs in high rate EBPR systems. Here we demonstrate efficient phosphorus removal (83% orthophosphate removal) in a high rate EBPR sequencing batch reactor fed real primary effluent and operated at 20 °C. Stable operation was achieved at a total SRT of 1.8 ± 0.2 days and hydraulic retention time of 3.7–4.8 hours. 16S rRNA gene sequencing data demonstrated that Accumulibacter were the dominant PAO throughout the study, with a washout aerobic SRT between 0.8 and 1.4 days. qPCR targeting the polyphosphate kinase gene revealed that Accumulibacter clades IIA, IIB and IID dominated the PAO community at low SRT operation, while clade IA was washed out at the lowest SRT values.

The Effect of PHA on Enhanced Biological Phosphorus Removal

2012 ◽  
Vol 610-613 ◽  
pp. 1343-1348
Author(s):  
Wei Han ◽  
Linjiang Yuan ◽  
Lu Chai ◽  
Kai Zhao ◽  
Guang Zhu Li
Keyword(s):  
Energy Storage ◽  
Carbon Source ◽  
Retention Time ◽  
Phosphorus Removal ◽  
Enhanced Biological Phosphorus Removal ◽  
Biological Phosphorus Removal ◽  
Sludge Retention Time ◽  
Removal Capacity ◽  
Intracellular Energy ◽  
Biological Phosphorus

Used A/O-SBR(anaerobic/aerobic alternating enhanced biological phosphorus removal system) to study carbon source and phosphate accumulating organisms (PAO) intracellular energy storage substance transformation, also studied PAO’s phosphorus removal capacity. PAO could uptake quick degradation organic matters and synthesis polyhydroxyalkanoates(PHA). PHA was a kind of intracellular energy storage substance, its content could affect PAO’s phosphorus removal capacity. When carbon source was plentiful, PAO could synthesis a lot of PHA, phosphorus removal capacity could reach 38.16 mgp/gvss. Sludge retention time could affect PAO synthesis PHA of quantity and structure. Along with the sludge retention time growth, intracellular PHA content was increased, and phosphorus uptake of desired aerobic time continues to decrease, so increasing the phosphorus removal efficiency. When the municipal sewage as carbon source, PHA was mainly composed of PHB(poly-ß-hydroxyvalerate) and PHV(poly-ß-hydroxyvalerate). Along with the sludge retention time prolongation, PAO could synthesis more PHV, PHB content was remain unchanged, PHA composition structure was changed.

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