scholarly journals Biological nitrogen and phosphorus removal using anoxic-anaerobic oxidation ditch under low temperature condition

2018 ◽  
Author(s):  
LiChao Nengzi ◽  
JinZhao Hu ◽  
XueMei Wang ◽  
Hong Yang ◽  
JianBin Chen ◽  
...  
Keyword(s):  
Low Temperature ◽  
Phosphorus Removal ◽  
Anaerobic Oxidation ◽  
Oxidation Ditch ◽  
Nitrogen And Phosphorus ◽  
Nitrogen And Phosphorus Removal ◽  
Biological Nitrogen

Performance of Anoxic-Anaerobic Oxidation Ditch for Nutrient Removal under Low Temperature Condition

2012 ◽  
Vol 518-523 ◽  
pp. 1776-1779
Author(s):  
Lin Lin Bao ◽  
Qing Feng Cheng ◽  
Dong Li ◽  
Jie Zhang
Keyword(s):  
Low Temperature ◽  
Phosphorus Removal ◽  
Removal Rate ◽  
Pilot Scale ◽  
Average Concentration ◽  
Anaerobic Oxidation ◽  
Oxidation Ditch ◽  
Operational Parameters ◽  
Nitrogen And Phosphorus ◽  
Nitrogen And Phosphorus Removal

Temperature was a very important factor affecting the efficiency of biological nitrogen and phosphorus removal, as temperature sharply affecting the biological activity of biomass. A pilot-scale anoxic-anaerobic oxidation ditch (OD) process was used to investigate the efficiency of organic, nitrogen and phosphorus removal under the low temperature condition in this study. The results indicated that the nitrification and COD removal was very sensitive to the temperature changing, but the TP removal was not sensitive. When the temperature decreased from 25 degrees Celsius to15 degrees Celsius, the water quality of the effluent deteriorated obviously. A high removal rate of COD, TN, NH4+-N and TP was achieved at temperature of 15 degrees Celsius by changing the operational parameters in this study. The average concentration of COD, TN, NH4+-N and TP in effluent was 26.2 mg/L, 12.1 mg/L, 3.9 mg/L and 0.34 mg/L respectively.

Evaluation of a novel oxidation ditch system for biological nitrogen and phosphorus removal from domestic sewage

2010 ◽  
Vol 62 (8) ◽  
pp. 1745-1754 ◽  
Author(s):  
X. Chen ◽  
T. Fujiwara ◽  
K. Ohtoshi ◽  
S. Inamori ◽  
K. Nakamachi ◽  
...  
Keyword(s):  
Nitrogen Removal ◽  
Phosphorus Removal ◽  
Domestic Sewage ◽  
Control Technology ◽  
Oxidation Ditch ◽  
Anoxic Zone ◽  
Nitrogen And Phosphorus ◽  
Nitrogen And Phosphorus Removal ◽  
Do Control ◽  
Biological Nitrogen

A novel oxidation ditch system using anaerobic tanks and innovative dual dissolved oxygen (DO) control technology is proposed for biological nitrogen and phosphorus removal from domestic sewage. A continuous bench-scale experiment running for more than 300 days was performed to evaluate the system. Monitoring and controlling the airflow and recirculation flow rate independently using DO values at two points along the ditch permitted maintenance of aerobic and anoxic zone ratios of around 0.30 and 0.50, respectively. The ability to optimize aerobic and anoxic zone ratios using the dual DO control technology meant that a total nitrogen removal efficiency of 83.2–92.9% could be maintained. This remarkable nitrogen removal performance minimized the nitrate recycle to anaerobic tanks inhibiting the phosphorus release. Hence, the total phosphorus removal efficiency was also improved and ranged within 72.6–88.0%. These results demonstrated that stabilization of the aerobic and anoxic zone ratio by dual DO control technology not only resulted in a marked improvement of nitrogen removal, but it also enhanced phosphorus removal.

A Systems Choice for Wastewater Treatment Systems for Biological Treatment of Domestic Wastewater with Excessive N- and P-Removal

1991 ◽  
Vol 24 (10) ◽  
pp. 231-237
Author(s):  
W. G. Werumeus Buning ◽  
F. W. A. M. Rijnart ◽  
P. P. Weesendorp
Keyword(s):  
Phosphorus Removal ◽  
Biological Treatment ◽  
Domestic Wastewater ◽  
Phosphate Removal ◽  
Oxidation Ditch ◽  
Nitrogen And Phosphorus ◽  
Nitrogen And Phosphorus Removal ◽  
Effluent Standards ◽  
Wastewater Treatment Systems ◽  
P Removal

To meet two levels of nitrogen and phosphorus removal (effluent standards Ntot 20 and 10 mg/l and Ptot 2 and 1 mg/l respectively) various systems were compared in a desk study. After a cost estimate and an assessment f the advantages and drawbacks, the oxidation ditch with biological by pass phosphate removal turned out to be the best system.

scholarly journals Effect of exposure time ratio on Intermittent Aerated Moving Bed Biofilm Reactor

2020 ◽  
Vol 167 ◽  
pp. 01008
Author(s):  
He Wang ◽  
Hui-qiang Li
Keyword(s):  
Exposure Time ◽  
Phosphorus Removal ◽  
Biofilm Reactor ◽  
Moving Bed Biofilm Reactor ◽  
Nitrogen And Phosphorus ◽  
Nitrogen And Phosphorus Removal ◽  
Time Ratio ◽  
Do Concentration ◽  
Biofilm Process ◽  
Biological Nitrogen

This study combined the IA craft, and the goal is to achieve aerobic, anoxic and even anaerobic alternating cycles in the same reactor to enhance biological nitrogen and phosphorus removal. At present, there are many studies on the IA process, but less research on the IAMBBR craft. The IAMBBR craft combines intermittent aeration with a biofilm process, which can further improve the processing capacity of a continuous-flow biofilm reactor. Therefore, it is necessary to conduct a detailed study of the IAMBBR craft. In addition, the exposure time ratio is an important parameter for the operation of the IA craft. By adjusting the exposure time ratio, the DO concentration in the reactor can be controlled, which affects the operation effect of the reactor. Therefore, this chapter mainly explores the effect of exposure time ratio on the operating effect of IAMBBR. Six operating stages were connected: the ratio of CA and exposure time are 3h/3h, 1h/1h, 30min/30min, 15min/15min, and 5min/5min, respectively, to study the removal effect of pollutants.

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