Diversity of phosphate accumulating organisms and novel mechanisms of enhanced biological phosphorus removal (EBPR) in wastewater treatment plants (WWTPs).

2020 ◽  
Author(s):  
HARI ANANDA RAO
Keyword(s):  
Wastewater Treatment ◽  
Phosphorus Removal ◽  
Wastewater Treatment Plants ◽  
Enhanced Biological Phosphorus Removal ◽  
Biological Phosphorus Removal ◽  
Biological Phosphorus

Metabolic versatility in full-scale wastewater treatment plants performing enhanced biological phosphorus removal

2013 ◽  
Vol 47 (19) ◽  
pp. 7032-7041 ◽  
Author(s):  
Ana B. Lanham ◽  
Adrian Oehmen ◽  
Aaron M. Saunders ◽  
Gilda Carvalho ◽  
Per H. Nielsen ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Phosphorus Removal ◽  
Wastewater Treatment Plants ◽  
Full Scale ◽  
Enhanced Biological Phosphorus Removal ◽  
Biological Phosphorus Removal ◽  
Metabolic Versatility ◽  
Biological Phosphorus

Presence of Rhodocyclus in a full-scale wastewater treatment plant and their participation in enhanced biological phosphorus removal

2002 ◽  
Vol 46 (1-2) ◽  
pp. 123-128 ◽  
Author(s):  
J.L. Zilles ◽  
C.-H. Hung ◽  
D.R. Noguera
Keyword(s):  
Wastewater Treatment ◽  
Phosphorus Removal ◽  
Fluorescent In Situ Hybridization ◽  
Wastewater Treatment Plants ◽  
Full Scale ◽  
Enhanced Biological Phosphorus Removal ◽  
Biological Phosphorus Removal ◽  
Polyphosphate Accumulating Organisms ◽  
Biological Phosphorus

The objective of this research was to assess the relevance of organisms related to Rhodocyclus in enhanced biological phosphorus removal in full-scale wastewater treatment plants. The presence of these organisms in full-scale plants was first confirmed by fluorescent in situ hybridization. To address which organisms were involved in phosphorus removal, a method was developed which selected polyphosphate-accumulating organisms from activated sludge samples by DAPI staining and flow cytometry. Sorted samples were characterized using fluorescent in situ hybridization. The results of these analyses confirmed the presence of organisms related to Rhodocyclus in full-scale wastewater treatment plants and supported the involvement of these organisms in enhanced biological phosphorus removal. However, a significant fraction of the polyphosphate-accumulating organisms were not related to Rhodocyclus.

Advanced wastewater treatment plants in lagoons combined with biological contactors

1994 ◽  
Vol 29 (12) ◽  
pp. 13-21
Author(s):  
P. Schleypen
Keyword(s):  
Wastewater Treatment ◽  
Removal Efficiency ◽  
Phosphorus Removal ◽  
Wastewater Treatment Plants ◽  
Enhanced Biological Phosphorus Removal ◽  
Biological Phosphorus Removal ◽  
Process Stability ◽  
Biological Sludge ◽  
Rotating Biological Contactors ◽  
Biological Phosphorus

Full-scale investigations have demonstrated that wastewater lagoons combined with rotating biological contactors can be installed for denitrification without much effort when designed for nitrification. By recirculation of a mixture of nitrified wastewater and biological sludge from the outlet of the high loaded sedimentation tank back to the inlet of the sedimentation pond the removal efficiency was consistently high combined with a high process stability. In addition a considerable amount of enhanced biological phosphorus removal could be attained simultaneously.

scholarly journals Waste Ochre for Control of Phosphates and Sulfides in Digesters at Wastewater Treatment Plants with Enhanced Biological Phosphorus Removal

2020 ◽  
Vol 2 (1) ◽  
pp. 116-126
Author(s):  
Svetlana Öfverström ◽  
Åsa Davidsson ◽  
Salar Haghighatafshar ◽  
Hamse Kjerstadius ◽  
Jes la Cour Jansen
Keyword(s):  
Wastewater Treatment ◽  
Phosphorus Removal ◽  
Wastewater Treatment Plants ◽  
Pilot Scale ◽  
Enhanced Biological Phosphorus Removal ◽  
Biological Phosphorus Removal ◽  
Molar Ratios ◽  
Digestion Process ◽  
Biological Phosphorus ◽  
Different Doses

Ochre, waste iron sludge from the treatment of iron rich groundwater for potable use, makes up a significant waste problem. Furthermore, wastewater treatment plants with enhanced biological phosphorus removal and the digestion of sludge are in lack of iron for the prevention of hydrogen sulfide production and the release of phosphorous during anaerobic digestion. Thus, the addition of ochre to anaerobic digestion is a potential beneficial reuse of ochre. Sludge from wastewater treatment plants with enhanced biological phosphorus removal was used for the experiments. Batch and continuous pilot-scale tests were performed for the mesophilic digestion of primary and waste-activated sludge with different doses of ochre. Two different doses of ochre corresponding to molar ratios of 1 and 2 moles Fe3+/mole P released in the batch test resulted in 29% and 57% reductions of phosphates respectively in the sludge liquor compared to the control sludge without inhibiting the digestion process. In the pilot experiment, the dosing of ochre at both a high and low dose (molar ratios of 1.6 and 0.8 Fe3+/S2−, respectively) resulted in an immediate drop in the H2S concentration (from >2000 ppm down to 570 ppm), while the control reactor still produced biogas with a high hydrogen sulfide concentration. The inhibition of the digestion process was observed (accumulation of acetate) at the higher dose. In a second pilot scale experiment, lower doses of ochre were tested continuously (1.5 and 0.75 mole Fe3+/mole Preleased) to avoid any inhibition, while evaluating the phosphate precipitation. A reduction of phosphates in sludge liquor (33% and 66% for the low and high doses respectively) was obtained.

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