The effect of chemical bulking control on biological nutrient removal in a full scale activated sludge plant

1996 ◽  
Vol 34 (3-4) ◽  
pp. 275-282 ◽  
Author(s):  
G. B. Saayman ◽  
C. F. Schutte ◽  
J. van Leeuwen
Keyword(s):  
Hydrogen Peroxide ◽  
Activated Sludge ◽  
Nutrient Removal ◽  
Pilot Scale ◽  
Full Scale ◽  
City Council ◽  
Phosphate Removal ◽  
Biological Nutrient Removal ◽  
Removal Processes ◽  
The City

The use of chemicals for sludge bulking control has a direct effect on the biological nutrient removal processes in activated sludge systems designed for this purpose. Chlorine has been used on full scale but information on the use of ozone and hydrogen peroxide is limited to pilot scale tests. The objective of this study was to investigate the effects of chlorine, ozone and hydrogen peroxide on nutrient removal processes when used on a continuous basis for bulking control in a full scale biological nutrient removal activated sludge plant. The full scale studies were conducted over a period of 39 months at the Daspoort sewage works of the City Council of Pretoria. The results indicate that at low dosages the oxidants have limited effects on the nutrient removal processes but at higher levels chlorine had a detrimental effect resulting in the phosphate limit of 1 mg P.1−1 being exceeded. It is concluded that chlorine is the most effective of the three oxidants for bulking control, but that it should be used with caution in order not to upset the biological phosphate removal processes. Ozone at low levels had a small but consistent positive effect on bulking control as well as on nutrient removal. The effects of hydrogen peroxide were very small except at high dosages.

Operating Experience with Biological Nutrient Removal at the Johannesburg Bushkoppie Works

1988 ◽  
Vol 20 (4-5) ◽  
pp. 51-62 ◽  
Author(s):  
A. R. Pitman ◽  
B. C. Trim ◽  
L. van Dalsen
Keyword(s):  
Nutrient Removal ◽  
Operating Experience ◽  
Biological Nutrient Removal ◽  
Successful Performance ◽  
Substrate Quality ◽  
Process Configuration ◽  
Removal Processes ◽  
Aeration Process ◽  
The City ◽  
Sludge Settleability

Various factors are important for the successful performance of biological nutrient removal processes. This paper reviews the performance of the new Bushkoppie Plant in Johannesburg in relation to other nutrient removal plants in the city and from these experiences, highlights important aspects to be considered in the design and operation of these plants. These are substrate quality, denitrification, sludge settleability, aeration, process configuration and sludge handling and disposal.

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.

Biological Nutrient Removal of Nitrogen Using Cyclic Aeration: Application in a Full-Scale Activated Sludge Treatment Plant

2010 ◽  
Vol 2010 (17) ◽  
pp. 742-756
Author(s):  
Jennifer Ruddy ◽  
Say K. Ong ◽  
Keith Hobson ◽  
Phil Koundakjian ◽  
Jim Buck
Keyword(s):  
Activated Sludge ◽  
Nutrient Removal ◽  
Treatment Plant ◽  
Full Scale ◽  
Biological Nutrient Removal ◽  
Sludge Treatment

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.

Application of Aerobic Kenaf Granules for Biological Nutrient Removal in a Full-scale Continuous Flow Activated Sludge System

Chemosphere ◽  
2020 ◽  
pp. 129522
Author(s):  
Stephany P. Wei ◽  
Bao Nguyen Quoc ◽  
Madelyn Shapiro ◽  
Pin Hsuan Chang ◽  
Calhoun Jason ◽  
...  
Keyword(s):  
Activated Sludge ◽  
Nutrient Removal ◽  
Continuous Flow ◽  
Full Scale ◽  
Biological Nutrient Removal ◽  
Activated Sludge System
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