Multi-objective optimization of cascade controller in combined biological nitrogen and phosphorus removal wastewater treatment plant

2012 ◽  
Vol 43 (1-3) ◽  
pp. 138-148 ◽  
Author(s):  
Hongbin Liu ◽  
Kwang-Hyeon Chang ◽  
ChangKyoo Yoo
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Phosphorus Removal ◽  
Treatment Plant ◽  
Multi Objective Optimization ◽  
Nitrogen And Phosphorus ◽  
Nitrogen And Phosphorus Removal ◽  
Multi Objective ◽  
Biological Nitrogen

Application of reversed A2/O process on removing nitrogen and phosphorus from municipal wastewater in China

2011 ◽  
Vol 63 (10) ◽  
pp. 2138-2142 ◽  
Author(s):  
X. S. Kang ◽  
C. Q. Liu ◽  
B. Zhang ◽  
X. J. Bi ◽  
F. Zhang ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Phosphorus Removal ◽  
Municipal Wastewater ◽  
Treatment Plant ◽  
Practical Application ◽  
Nitrogen And Phosphorus ◽  
Nitrogen And Phosphorus Removal ◽  
New Process ◽  
Technical Features

The application of reversed A2/O process in practice in China is mainly discussed in this paper. As a new process on nitrogen and phosphorus removal, principle and technical features of reversed A2/O process are also summarized. The application in rebuilt wastewater treatment plant shows that reversed A2/O process not only has merits on high nitrogen and phosphorus removal efficiency, but also has merits on energy saving. The application in newly-build wastewater treatment plant shows that infrastructure and equipment investment of reversed A2/O process economized 15% and 10% respectively, compared to conventional A2/O process. The practical application shows that reversed A2/O process is a new nitrogen and phosphorus removal process, which is suitable for China's national conditions.

Evolution of the Southpest Wastewater Treatment Plant

2000 ◽  
Vol 41 (9) ◽  
pp. 7-14
Author(s):  
A. Jobbágy ◽  
B. Literáthy ◽  
F. Farkas ◽  
Gy. Garai ◽  
Gy. Kovács
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Wastewater Treatment Plant ◽  
Phosphorus Removal ◽  
Treatment Plant ◽  
Low Flow ◽  
Nitrate Content ◽  
Nitrogen And Phosphorus ◽  
Treated Effluent ◽  
Processing Wastes

The treated effluent of the Southpest Wastewater Treatment Plant is discharged into a small, low-flow branch of the Danube susceptible to eutrophication. The first, high-load activated sludge system with a hydraulic retention time of 2.5 hrs in the aerated basins, was installed here in 1966. The paper presents the evolution of the technology by illustrating the effects of the different changes carried out since 1991. Reconfiguration of the existing activated sludge basins connected originally in parallel into an arrangement of tanks in series increased the settleability of the sludge as well as the efficiency of COD removal significantly. Introduction of an anaerobic zone preceding the aerated basins facilitated biological excess phosphorus removal with a consequent release in the thickener and digester. Introducing lime addition into the recycled sludge processing wastes significantly improved the performance of the system. However, since there had been no provision built for eliminating the nitrate content of the recycled sludge, efficiency of phosphorus removal proved to be dependent on the eventually occurring nitrification. In order to achieve both an effective nitrogen and phosphorus removal the current technology established in 1999 applies a nitrification and a denitrification filter following the activated sludge unit and uses precipitation for phosphorus removal.

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