Biological phosphorus uptake in submerged biofilters with nitrogen removal

1994 ◽  
Vol 29 (10-11) ◽  
pp. 135-143 ◽  
Author(s):  
R. F. Gonçalves ◽  
L. Le Grand ◽  
F. Rogalla
Keyword(s):  
Phosphorus Removal ◽  
Phosphorus Uptake ◽  
Treatment Plant ◽  
Pilot Scale ◽  
Biological Phosphorus Removal ◽  
Low Phosphorus ◽  
Nitrification And Denitrification ◽  
Aerated Filter ◽  
Filter Bed ◽  
Biological Phosphorus

This paper introduces biological phosphorus removal (Bio-P) from wastewater on a submerged biofilter. Pilot scale research was carried out over a period of two years using a floating upflow aerated filter, originally designed for nitrification and denitrification of sewage. The factors which influence Bio-P on fixed film processes and the possible biofilter configurations which eliminate C, N and P are discussed. The procedures are applicable to all types of treatment plants using biofilters, both new and already in existence, making no distinction between the different processes available today, co-current and counter-current filters. Biological phosphorus removal can be associated to the different treatment levels required: organic matter removal; secondary nitrification secondary nitrification and denitrification. For the third option - complete nutrient removal, treatment is completed with a hydraulic retention time in the filter bed of under four hours. Because of the simultaneous filtration with effluent SS below 10 mg/l, low phosphorus residuals can be achieved by Bio-P alone. The modifications required for setting up this operating procedure on any treatment plant are presented.

Continuous Biological Phosphorus Removal in a Biofilm Reactor

1992 ◽  
Vol 26 (9-11) ◽  
pp. 2027-2030 ◽  
Author(s):  
R. F. Gonçalves ◽  
F. Rogalla
Keyword(s):  
Phosphorus Removal ◽  
Hydraulic Retention Time ◽  
Phosphorus Uptake ◽  
Pilot Scale ◽  
Biofilm Reactor ◽  
Biological Phosphorus Removal ◽  
Limiting Parameters ◽  
Aerated Filter ◽  
The Impact ◽  
Biological Phosphorus

Mechanisms for biological phosphorus removal from wastewaters in an upflow granular aerated filter are evaluated. The feasibility of excess phosphorus uptake on fixed bacteria is demonstrated on pilot scale and the limiting parameters are established. The influence of the duration of anaerobic and aerobic states and of substrate loadings on phosphorus removal is verified, as well as the impact of alternating aeration on nitrification. Because bacteria are attached, hydraulic retention time of biomass and water can be separated and the exposure of bacteria to anaerobic or aerated conditions can be optimised.

Pilot Scale Studies on Enhanced Phosphorus Removal in a Single-Stage Activated Sludge Treatment Plant

1985 ◽  
Vol 17 (11-12) ◽  
pp. 309-310 ◽  
Author(s):  
W. Maier ◽  
P. Kainrath ◽  
Kh Krauth ◽  
R. Wagner
Keyword(s):  
Activated Sludge ◽  
Phosphorus Removal ◽  
Continuous Process ◽  
Treatment Plant ◽  
Pilot Scale ◽  
Single Stage ◽  
Biological Phosphorus Removal ◽  
Sludge Treatment ◽  
Biological Phosphorus ◽  
P Removal

Enhanced biological phosphorus removal from domestic sewage was investigated in a single-stage activated sludge treatment plant with pre-denitrification operated in a continuous process. In 10 different experimental periods the influence of varying composition of the influent, varying systems of the pilot scale unit (with and without anaerobic basin), varying retention times in the different basins and varying sludge loads were investigated. Results of the experiments can be summarized as follows: the nutrient situation and especially the P/BOD5 and N/BOD5 ratios, retention time in the final clarifier, and organic sludge load plus the desired degree of nitrification have essential influence on the process and P removal efficiency. The conclusions for the pilot scale process are discussed.

Analysis on Phosphorus Removal from Domestic Wastewater Treatment Plant by Biological Aerated Filter

2013 ◽  
Vol 641-642 ◽  
pp. 299-302 ◽  
Author(s):  
Yin Song Liu ◽  
Hong Jun Han ◽  
Chun Yan Xu ◽  
Bing Wang ◽  
Jian Feng Tan
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Phosphorus Removal ◽  
Treatment Plant ◽  
Domestic Wastewater ◽  
Biological Aerated Filter ◽  
Biological Phosphorus Removal ◽  
Domestic Wastewater Treatment ◽  
Aerated Filter ◽  
Biological Phosphorus

Hydrolysis acidification / pre-denitrification biological aerated filter was adopted in a domestic wastewater treatment plant. The effluent was accorded with a standard in the Integrated Wastewater Discharge Standard（GB18918-2002）, in which the effluent phosphorus was demanded below 0.5mg/L. Through analysis on the process biological phosphorus removal, biological method can be found to total phosphorus 1.5 mg/L. If you reach level to an emissions standards, phosphorus chemical experiment research, finally determined by strategy for the CN pool, point for adding potions FeCl3, dosing quantity for 35mg/L.

A Pilot-Scale Experimental Research on Biological Phosphorus Removal in a Modified SBR Treating Urban Wastewater

2012 ◽  
Vol 550-553 ◽  
pp. 2329-2332
Author(s):  
Jun Li ◽  
Tao Tao ◽  
Xue Bin Li ◽  
Jiong Hui Li
Keyword(s):  
Removal Efficiency ◽  
Phosphorus Removal ◽  
Treatment Plant ◽  
Pilot Scale ◽  
Biological Phosphorus Removal ◽  
Urban Wastewater ◽  
Residual Sludge ◽  
Urban Wastewater Treatment ◽  
Biological Phosphorus ◽  
Very High

A pilot-scale modified SBR process was used to treat urban wastewater. The average NH4+-N efficiency removal was 98 %. The average TN removal efficiency was 52 %. The average TP removal efficiency was 85 %. The average COD removal efficiency was 85 %. The average effluent NH4+-N was 0.34 mg/L. The average effluent TN was 12 mg/L. The average effluent phosphorus was 0.75 mg/L. The average effluent COD was 35 mg/L. The result shows that the increase of 100 mg/L MLSS concentrations by proliferation or decrease of 100 mg/L MLSS concentrations by discharging residual sludge can remove 1 mg/L total phosphorus from wastewater. The faster the MLSS increases, the higher efficiency the phosphorus removal is achieved. When MLSS is fluctuating or decreasing, the phosphorus removal would be worse than MLSS increase. When MLSS increases 500 mg/L everyday, phosphorus removal efficiency would be very high; the average phosphorus removal efficiency would be higher than 90 % in the most urban wastewater treatment plant.

Conversion of Existing Primary Clarifiers According to the EASC Process for Biological Phosphorus Removal

1990 ◽  
Vol 22 (7-8) ◽  
pp. 45-51 ◽  
Author(s):  
R. Schönberger
Keyword(s):  
Phosphorus Removal ◽  
Municipal Wastewater ◽  
Operation Mode ◽  
Phosphorus Uptake ◽  
Treatment Plant ◽  
Municipal Wastewater Treatment ◽  
Biological Phosphorus Removal ◽  
Northern Germany ◽  
Start Up ◽  
Biological Phosphorus

At the end of 1988 a 22,000 p.e. municipal wastewater treatment plant in Northern Germany was converted to the EASC-biological phosphorus removal process. By simple modifications of the flow scheme of the plant, one of two existing primary clarifiers was converted to an anaerobic basin, into which both sewage and recycle sludge are fed. The supernatant as well as the sludge withdrawn from the bottom are discharged into the aeration basin. This operation mode achieves very good phosphorus uptake in the aeration basin. Since start up in November '88, the uptake-capacity increased continually, since April '89 phosphorus is removed down to concentrations of less than 1 mg/l PO4-P in the aeration basin. Due to an inadequate design and size of the existing final clarifier, phosphorus bleedback occurs and reduces removal efficiency. This bleedback could be minimized by either intensifying denitrification or reducing sludge detention time in the final clarifier.

Heterotrophic Kinetic Parameter Estimation for Enhanced Biological Phosphorus Removal Processes Operated in Conventional and Membrane-Assisted Modes

2006 ◽  
Vol 41 (1) ◽  
pp. 72-83 ◽  
Author(s):  
Zhe Zhang ◽  
Eric R. Hall
Keyword(s):  
Parameter Estimation ◽  
Phosphorus Removal ◽  
Growth Yield ◽  
Pilot Scale ◽  
Enhanced Biological Phosphorus Removal ◽  
Biological Phosphorus Removal ◽  
Nitrogen And Phosphorus ◽  
Parameter Values ◽  
The Impact ◽  
Biological Phosphorus

Abstract Parameter estimation and wastewater characterization are crucial for modelling of the membrane enhanced biological phosphorus removal (MEBPR) process. Prior to determining the values of a subset of kinetic and stoichiometric parameters used in ASM No. 2 (ASM2), the carbon, nitrogen and phosphorus fractions of influent wastewater at the University of British Columbia (UBC) pilot plant were characterized. It was found that the UBC wastewater contained fractions of volatile acids (SA), readily fermentable biodegradable COD (SF) and slowly biodegradable COD (XS) that fell within the ASM2 default value ranges. The contents of soluble inert COD (SI) and particulate inert COD (XI) were somewhat higher than ASM2 default values. Mixed liquor samples from pilot-scale MEBPR and conventional enhanced biological phosphorus removal (CEBPR) processes operated under parallel conditions, were then analyzed experimentally to assess the impact of operation in a membrane-assisted mode on the growth yield (YH), decay coefficient (bH) and maximum specific growth rate of heterotrophic biomass (µH). The resulting values for YH, bH and µH were slightly lower for the MEBPR train than for the CEBPR train, but the differences were not statistically significant. It is suggested that MEBPR simulation using ASM2 could be accomplished satisfactorily using parameter values determined for a conventional biological phosphorus removal process, if MEBPR parameter values are not available.

Biochemical Aspects of Enhanced Biological Phosphorus Removal from Wastewater

1985 ◽  
Vol 17 (11-12) ◽  
pp. 23-41 ◽  
Author(s):  
M. C. Hascoet ◽  
M. Florentz ◽  
P. Granger
Keyword(s):  
Activated Sludge ◽  
Phosphorus Removal ◽  
Phosphorus Uptake ◽  
Enhanced Biological Phosphorus Removal ◽  
Biological Phosphorus Removal ◽  
The Past ◽  
Nitrate Addition ◽  
The Subject ◽  
Biological Phosphorus ◽  
Microbiological Analyses

Enhanced biological phosphorus removal from wastewater by means of microorganisms found in activated sludge has for the past few years been the subject of much research and it is now commonly recognized that an activated sludge system must include alternating anaerobic-aerobic periods. The present article covers biochemical aspects of this phenomenon using a phosphorus removing biomass obtained in a laboratory-scale pilot with alternating phases and a synthetic substrate feed. The percentage of phosphorus obtained in the pilot sludge was four times greater than that of a conventional sludge plant. By exposing the same biomass to different conditions and using 31P Nuclear Magnetic Resonance, we were able to accurately pin-point the various forms of phosphorus found within cells and follow their development during the course of alternating phases. The following results were obtained:the transformation of phosphorus in its inorganic to polyphosphate form depends on the medium's level of oxygenation,the presence of nitrates disturbs the anaerobic period but does not affect phosphorus uptake in the aerated period.Continuous nitrate addition alters biomass behaviour in the anaerobic phase, which loses the capacity to release phosphorus,copper at a concentration of over 1 mg Cu2+/1 inhibits phosphorus uptake in the aerated phase. Various microbiological analyses made on the pilot biomass isolated conventional bacteria found in activated sludge.

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