Stability of full-scale engineered ecosystem under disturbance: Response of an activated sludge biological nutrient removal reactor to high flow rate condition

2016 ◽  
Vol 109 ◽  
pp. 88-95 ◽  
Author(s):  
Zhiya Sheng ◽  
Abdul Mohammed ◽  
Yang Liu
Keyword(s):  
Activated Sludge ◽  
Flow Rate ◽  
Nutrient Removal ◽  
High Flow ◽  
Full Scale ◽  
High Flow Rate ◽  
Biological Nutrient Removal ◽  
Rate Condition ◽  
Disturbance Response

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.

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.

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

Development of a mechanistic model for biological nutrient removal activated sludge systems and application to a full-scale WWTP

AIChE Journal ◽  
2009 ◽  
Vol 56 (6) ◽  
pp. 1626-1638 ◽  
Author(s):  
Bing-Jie Ni ◽  
Wen-Ming Xie ◽  
Shao-Gen Liu ◽  
Han-Qing Yu ◽  
Yi-Ping Gan ◽  
...  
Keyword(s):  
Activated Sludge ◽  
Nutrient Removal ◽  
Mechanistic Model ◽  
Full Scale ◽  
Biological Nutrient Removal ◽  
Activated Sludge Systems

scholarly journals Nutrient Removal Performance on Domestic Wastewater Treatment Plants (Full Scale System) between Tropical Humid and Cold Climates

2018 ◽  
pp. 32-39
Author(s):  
Pongsak Noophan ◽  
Rawiwan Rodpho ◽  
Pimook Sonmee ◽  
Martha Hahn ◽  
Suthep Sirivitayaphakorn
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Nutrient Removal ◽  
Wastewater Treatment Plants ◽  
Domestic Wastewater ◽  
Full Scale ◽  
Biological Nutrient Removal ◽  
Cold Climates ◽  
Domestic Wastewater Treatment ◽  
Warm Climates

Two full scale systems of oxidation ditches for domestic wastewater treatment plants (WWTP) were used as study sites: Phuket Province, southern Thailand (representative of tropical humid climates) and Plum Creek, Castle Rock, Colorado, USA (representative of cold climates). The treatment systems at both sites were designed for biological nutrient removal (BNR) fromextended activated sludge. Nitrogen is removed by nitrification-denitrification processes. The solid retention time (SRT) for both treatment plants was ≥ 10 das recommended by theory for complete nitrification in activated sludge wastewater treatment plants. Influents and effluents from these sites were compared in respect to flow rate, biochemical oxygen demand (BOD), organic nitrogen, ammonium, nitrate, total nitrogen, and phosphorus concentrations. At both sites, nutrient removal reached more than 75% because there was sufficient carbon for denitrifying and phosphate accumulating organisms. Furthermore, low dissolved oxygen concentration, long SRT, and hightemperature could be key factors to promote activity of some groups of bacteria in consuming organic matter and nutrients in wastewater in warm climates. For this reason, plant design and operating procedures for wastewater treatment in cold climates might not be always be applicable to warm climates.

Design Considerations for Nutrient Removal Activated Sludge Plants

1991 ◽  
Vol 23 (4-6) ◽  
pp. 781-790 ◽  
Author(s):  
A. R. Pitman
Keyword(s):  
Activated Sludge ◽  
Nutrient Removal ◽  
Phosphorus Removal ◽  
Full Scale ◽  
Biological Nutrient Removal ◽  
Biological Phosphorus Removal ◽  
Anoxic Zone ◽  
Mixed Liquor ◽  
Design Considerations ◽  
Biological Phosphorus

Based on more than 10 years' experience with biological nutrient removal in Johannesburg, this paper highlights aspects which should be borne in mind in the design of such processes. Feed sewage quality and the question of treating raw or settled sewage are considered. More importantly, methods of rendering the feed more suitable for biological phosphorus removal are detailed. As nitrate feedback to the anaerobic zone can often mitigate against good phosphorus removal, methods of obviating this are covered. In this respect the need for, and placement of a second anoxic zone are discussed. Process type and configuration are covered as well as zone retention periods and the split of process volume into unaerated and aerated fractions. Aeration systems and the tailoring of aeration to process needs are also discussed. Two problems that have been experienced in many full-scale plants are bulking sludges and prolific growths of nuisance scums. Methods of minimising these problems are discussed. Finally, mixed liquor and return sludge recycles; aspects to be borne in mind in the design of final clarifiers and the provision of standby chemical addition are discussed.

Development of the microbial community of a full scale biological nutrient removal activated sludge plant during start-up

1995 ◽  
Vol 29 (9) ◽  
pp. 2085-2093 ◽  
Author(s):  
G.C. Knight ◽  
E.M. Seviour ◽  
R.J. Seviour ◽  
J.A. Soddell ◽  
K.C. Lindrea ◽  
...  
Keyword(s):  
Microbial Community ◽  
Activated Sludge ◽  
Nutrient Removal ◽  
Full Scale ◽  
Biological Nutrient Removal ◽  
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