scholarly journals Biological nutrient removal in a continuous biofilm process

2017 ◽  
Vol 12 (4) ◽  
pp. 797-805 ◽  
Author(s):  
T. Saltnes ◽  
G. Sørensen ◽  
S. Eikås
Keyword(s):  
Nitrogen Removal ◽  
Nutrient Removal ◽  
Laboratory Experiments ◽  
Continuous Process ◽  
Biological Nutrient Removal ◽  
Simultaneous Nitrification And Denitrification ◽  
Organic Substances ◽  
Phosphorous Removal ◽  
Improved Performance ◽  
Biofilm Process

Abstract A new biological phosphorous and nitrogen removal process is developed. The process is based on biofilm on carrier elements with enhanced biological phosphorous removal and simultaneous nitrification and denitrification in a continuous process. Results from 3 years of pilot and laboratory experiments are presented with regards to removal of organic substances, phosphorous and nitrogen. This process demonstrates essential benefits and improved performance compared to other EBPR-processes in operation today. The first full scale plant was put in operation in May 2016 at Hias WWTP in Norway.

scholarly journals Biological Nutrient Removal Model No. 2 (BNRM2): a general model for wastewater treatment plants

2013 ◽  
Vol 67 (7) ◽  
pp. 1481-1489 ◽  
Author(s):  
R. Barat ◽  
J. Serralta ◽  
M. V. Ruano ◽  
E. Jiménez ◽  
J. Ribes ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Nitrogen Removal ◽  
Nutrient Removal ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Operating Conditions ◽  
Plant Performance ◽  
Biological Nutrient Removal ◽  
Nitrite Oxidizing Bacteria ◽  
Removal Model

This paper presents the plant-wide model Biological Nutrient Removal Model No. 2 (BNRM2). Since nitrite was not considered in the BNRM1, and this previous model also failed to accurately simulate the anaerobic digestion because precipitation processes were not considered, an extension of BNRM1 has been developed. This extension comprises all the components and processes required to simulate nitrogen removal via nitrite and the formation of the solids most likely to precipitate in anaerobic digesters. The solids considered in BNRM2 are: struvite, amorphous calcium phosphate, hidroxyapatite, newberite, vivianite, strengite, variscite, and calcium carbonate. With regard to nitrogen removal via nitrite, apart from nitrite oxidizing bacteria two groups of ammonium oxidizing organisms (AOO) have been considered since different sets of kinetic parameters have been reported for the AOO present in activated sludge systems and SHARON (Single reactor system for High activity Ammonium Removal Over Nitrite) reactors. Due to the new processes considered, BNRM2 allows an accurate prediction of wastewater treatment plant performance in wider environmental and operating conditions.

Demonstration of enhanced nutrient removal at two full-scale SBR plants

2004 ◽  
Vol 50 (10) ◽  
pp. 115-120 ◽  
Author(s):  
M. Peters ◽  
M. Newland ◽  
T. Seviour ◽  
T. Broom ◽  
T. Bridle
Keyword(s):  
Nutrient Removal ◽  
Full Scale ◽  
Biological Nutrient Removal ◽  
Batch Reactors ◽  
Simultaneous Nitrification And Denitrification ◽  
Sequencing Batch Reactors ◽  
Operational Control ◽  
The World ◽  
High Level ◽  
Operational Data

The efficacy of sequencing batch reactors (SBRs) to provide high levels of biological nutrient removal has been extensively demonstrated around the world. Environmental Solutions International (ESI) has now constructed over 20 full-scale SBR plants and has confirmed that nutrient removal is enhanced via the process of simultaneous nitrification and denitrification. Over 18 months of operational data from two plants, operating in distinctly different catchments, processing an average of between 2,000 and 2,500 m3/d of wastewater, has clearly shown the efficacy and robustness of the ESI SBR-BNR process. Median effluent total nitrogen and total phosphorus values of 3 mg/L and <0.6 mg/L, respectively, were demonstrated over the 18-month period. This high level of nutrient removal is attributed to the design of the bio-selector which maximises carbon storage for the subsequent denitrification reactions, the effective aeration control which ensures no over-aeration during the air-on cycle as well as the level of operational control provided at these two plants.

Nitrogen Removal by a Submerged Biofilm Process with Fibrous Carriers

1992 ◽  
Vol 26 (9-11) ◽  
pp. 2039-2042 ◽  
Author(s):  
B. Wang ◽  
G. Li ◽  
Q. Yang ◽  
R. Liu
Keyword(s):  
Nitrogen Removal ◽  
Return Flow ◽  
Organic Substances ◽  
Optimal Conditions ◽  
Flow Ratio ◽  
Nitrification And Denitrification ◽  
Biofilm Process

A study on nitrogen removal by submerged biofilm attaching on fibrous carriers in A/0 process was carried out, with the emphasis put on finding out the optimal conditions for nitrification and denitrification with highest nitrogen removal. The influence of return flow ratio of nitrified effluent on the removal capacities of the system for organic substances and nitrogen was studied as well.

New Process Design for Biological Nutrient Removal

1992 ◽  
Vol 25 (4-5) ◽  
pp. 445-448 ◽  
Author(s):  
J. Wanner ◽  
J. S. Čech ◽  
M. Kos
Keyword(s):  
Activated Sludge ◽  
Process Design ◽  
Laboratory Experiments ◽  
Biological Process ◽  
Biological Nutrient Removal ◽  
Organic Substances ◽  
Anaerobic Reactor ◽  
New Process ◽  
Denitrification Reactor ◽  
P Removal

A new arrangement of the biological process for efficient COD, N and P removal has been proposed. The process consists of the anaerobic reactor where organic substances from waste water are sequestered into activated sludge, the nitrification reactor where ammonia-rich supernatant is oxidized, and the denitrification reactor where oxidized supernatant is mixed with the activated sludge separated from the anaerobic reactor. Laboratory experiments confirmed favorable characteristics of the proposed system.

Sludge production based on organic matter and nitrogen removal performances

2011 ◽  
Vol 6 (2) ◽  
Author(s):  
N. Serón ◽  
S. Puig ◽  
S.C.F. Meijer ◽  
M.D. Balaguer ◽  
J. Colprim
Keyword(s):  
Organic Matter ◽  
Nitrogen Removal ◽  
Nutrient Removal ◽  
Biological Treatment ◽  
Wastewater Treatment Plants ◽  
The Other ◽  
Biological Nutrient Removal ◽  
Optimal Conditions ◽  
Urban Wastewater ◽  
Sludge Production

Excess biomass produced during the biological treatment of wastewater requires costly disposal. As environmental and legislative constraints increase, there is considerable impetus for reducing the sludge production. Nowadays, several strategies for minimizing it production are applied but high costs still limit their application in full-scale wastewater treatment plants (WWTPs). On the other hand, biological nutrient removal (BNR) process may have an impact on the sludge production. This paper deals with the effect on the organic matter and nitrogen performances on the sludge production treating urban wastewater. The results demonstrated that the sewage sludge production was reduced between 50 to 60% (0.38 to 0.16 kg VSS·kg−1 COD) while improving the nitrogen removal efficiency from 33% to 79%. Therefore, an efficient way to minimize the sludge production, it is by operating the WWTP in optimal conditions for nutrient removal.

Re-use of winery wastewaters for biological nutrient removal

2007 ◽  
Vol 56 (2) ◽  
pp. 95-102 ◽  
Author(s):  
L. Rodríguez ◽  
J. Villaseñor ◽  
I.M. Buendía ◽  
F.J. Fernández
Keyword(s):  
Nitrogen Removal ◽  
Nutrient Removal ◽  
Phosphorus Removal ◽  
Pilot Scale ◽  
Cod Removal ◽  
Biological Nutrient Removal ◽  
Organic Substrates ◽  
Winery Wastewater ◽  
A Value ◽  
Removal Processes

The aim of this study was to evaluate the feasibility of the re-use of the winery wastewater to enhance the biological nutrient removal (BNR) process. In batch experiments it was observed that the addition of winery wastewater mainly enhanced the nitrogen removal process because of the high denitrification potential (DNP), of about 130 mg N/g COD, of the contained substrates. This value is very similar to that obtained by using pure organic substrates such as acetate. The addition of winery wastewater did not significantly affect either phosphorus or COD removal processes. Based on the experimental results obtained, the optimum dosage to remove each mg of N–NO3 was determined, being a value of 6.7 mg COD/mg N–NO3. Because of the good properties of the winery wastewater to enhance the nitrogen removal, the viability of its continuous addition in an activated sludge pilot-scale plant for BNR was studied. Dosing the winery wastewater to the pilot plant a significant increase in the nitrogen removal was detected, from 58 to 75%. The COD removal was slightly increased, from 89 to 95%, and the phosphorus removal remained constant.

Operation with biological nutrient removal with stable nitrification and control of filamentous growth

1998 ◽  
Vol 37 (4-5) ◽  
pp. 549-554 ◽  
Author(s):  
Maria Rothman
Keyword(s):  
Nitrogen Removal ◽  
Nutrient Removal ◽  
Suspended Solids ◽  
Treatment Plant ◽  
Filamentous Growth ◽  
Biological Nutrient Removal ◽  
Nitrification Rate ◽  
Do Concentration ◽  
And Control ◽  
Process Strategy

Bromma WWTP is the second largest wastewater treatment plant in Stockholm, Sweden. To meet new regulations regarding nitrogen removal the plant needs to be operated with nitrogen removal all year round. In previous years, severe bulking problems during the winter have made it impossible to maintain nitrification during colder temperatures. Microscopic examination of the activated sludge has increased the understanding of bulking. The bulking is mainly due to excessive growth of filamentous organisms, mainly Microthrix parvicella. By operating the plant with a high F/M ratio and decreasing the F/M ratio when filamentous growth occurs, excessive growth of these organisms can be avoided. The nitrification rate is optimized by adjusting the concentration of mixed liquid suspended solids in the tanks so that the nitrification is complete and by operating the tanks at a DO concentration of 4 mg/l. By this process strategy it is now possible to operate the plant with nitrification all year round.

Simulation of the operational conditions of the full-scale municipal wastewater treatment plant to improve the performance of nutrient removal

1997 ◽  
Vol 36 (12) ◽  
pp. 9-18 ◽  
Author(s):  
Naoyuki Funamizu ◽  
Shoichiro Yamamoto ◽  
Yoshio Kitagawa ◽  
Tetsuo Takakuwa
Keyword(s):  
Activated Sludge ◽  
Nitrogen Removal ◽  
Nutrient Removal ◽  
Full Scale ◽  
Hydrolysis Rate ◽  
Biological Nutrient Removal ◽  
Feed Ratio ◽  
Fermentation Products ◽  
Organic Matters ◽  
Operational Conditions

Simulation analysis based on a mathematical model is one of the powerful tools for determining the operational conditions for a full scale biological nutrient removal plant. The model that included the Activated Sludge Model No.2 was developed for simulating the performance of the plant in Sapporo City. The investigated plant has the biological reaction basin which consists of the four zones, anaerobic-aerobic-anoxic-aerobic phases with the step feed of the primary effluent to the anaerobic and anoxic zones. We performed three experiments to calibrate and verify our model: (i) Characterization of organic matters in the influent of the reaction basin with the OUR measurement method; (ii) Measurement of COD and nutrient concentration at the plant; (iii) Lab-scale batch experiments with the anaerobic-aerobic-anoxic-aerobic phases. The calibrating process of the model showed that no modification of parameter values was required to evaluate the performance of the plant and population of the activated sludge. Simulated results showed that the choice of the sewage step feed ratio did not affect the nitrogen removal and that the denitrification rate in the anoxic zone was controlled by the hydrolysis rate of the slowly biodegradable organic matters. The results of the lab-scale experiment and simulation results showed that the addition of the readily biodegradable organic matters like fermentation products of the primary settler sludge was effective to improve the performance of nitrogen removal.

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