Study on Biological Nitrogen Removal Performance of Aerobic Denitrification Treating Power Plant Wastewater

2013 ◽  
Vol 726-731 ◽  
pp. 2589-2593
Author(s):  
Tao Yang ◽  
Pei Ying Wu ◽  
Zhan Sheng Zhao ◽  
Hua Wei Xu ◽  
Gao Zhi Lv
Keyword(s):  
Power Plant ◽  
Carbon Source ◽  
Organic Carbon ◽  
Activated Sludge ◽  
Nitrogen Removal ◽  
Sodium Acetate ◽  
Aerobic Denitrification ◽  
Biological Nitrogen Removal ◽  
Organic Carbon Source ◽  
Biological Nitrogen

Enriched domestication in SBR was used to improve the proportion of aerobic denitrifiers in activated sludge, and actual power plant wastewater was treated, which proved the existence of aerobic denitrification. But at the later stage, because of carbon deficiency, aerobic denitrifiers were inhibited and NO3--N accumulated. Sodium acetate used as external organic carbon source was added when reaction carried on 3.5 hours to improve the COD/NH4+-N ratio from 6.5 to 10, effluent NO3--N concentration was 3.6 mg\L, average removal efficiency of TN was 90%, which could improve the aerobic denitrification performance of whole system effectively.

Accelerated anaerobic release of K, Mg and P from surplus activated sludge for element recovery and struvite formation inhibition

2017 ◽  
Vol 75 (9) ◽  
pp. 2149-2156 ◽  
Author(s):  
A. Ito ◽  
H. Kawakami ◽  
N. Ishikawa ◽  
M. Ito ◽  
T. Oikawa ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Carbon Source ◽  
Organic Carbon ◽  
Activated Sludge ◽  
Anaerobic Condition ◽  
Sodium Acetate ◽  
Digestion Process ◽  
Additional Process ◽  
Organic Carbon Source ◽  
New System

Accelerated release of potassium (K), magnesium (Mg) and phosphorus (P) from surplus activated sludge (SAS) was investigated to develop a new system for the recovery of the elements. Anaerobic cultivation of SAS during 24 h released 78% of K and about 50% of Mg and P from SAS more effectively compared to aerobic cultivation (K: 40%, Mg: 15%, P: 15%). Furthermore, the addition of sodium acetate as an organic carbon source remarkably accelerated the release of K, Mg and P from SAS under anaerobic condition. However, no increase in the maximum release efficiencies was observed. The elements released from SAS could be transferred to separate liquid with the existing mechanical thickener and be recovered as MgKPO4 by some additional process. Furthermore, the removal of the elements from SAS would inhibit the formation of struvite causing the blockage of sludge transport pipe after anaerobic digestion process of thickened sludge.

Organic carbon bioavailability: is it a good driver to choose the best biological nitrogen removal process?

2021 ◽  
pp. 147390
Author(s):  
Gabriela Bonassa ◽  
Alice Chiapetti Bolsan ◽  
Camila Ester Hollas ◽  
Bruno Venturin ◽  
Daniela Candido ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Nitrogen Removal ◽  
Biological Nitrogen Removal ◽  
Removal Process ◽  
Biological Nitrogen

A Short Review of Wastewater Biological Treatment at Low C/N ratio

2014 ◽  
Vol 962-965 ◽  
pp. 1490-1494
Author(s):  
Jian Zheng Li ◽  
Shuai Shi
Keyword(s):  
Carbon Source ◽  
Nitrogen Removal ◽  
Biological Treatment ◽  
Carbon Sources ◽  
Short Review ◽  
Biological Nitrogen Removal ◽  
Removal Processes ◽  
Biological Nitrogen ◽  
Low Nitrogen ◽  
Wastewater Biological Treatment

Low nitrogen removal efficiency caused by the lack of carbon source in low C/N ratio wastewater restricts the wastewater biological treatment. Advances in wastewater biological treatment at low C/N ratio are reviewed in the paper from three aspects, including modifying traditional biological nitrogen removal process, developing novel biological nitrogen removal processes and optimizing traditional carbon source and developing new types of carbon sources. The mechanisms, advantages, and applications of these processes are also summarized and analyzed.

Biological Nitrogen Removal Activated Sludge Process in Warm Climates

2015 ◽  
Vol 7 (0) ◽  
pp. 9781780401904-9781780401904
Author(s):  
C. Y. Shi ◽  
W. Y. Long ◽  
A. C. Meng ◽  
K. S. Raajeevan
Keyword(s):  
Activated Sludge ◽  
Nitrogen Removal ◽  
Biological Nitrogen Removal ◽  
Activated Sludge Process ◽  
Biological Nitrogen ◽  
Warm Climates

Enhanced Nitrogen Removal of Low C/N Wastewater in a Subsequent Denitrifying Reactor Fed by Endogenous Carbon Source Generated from Primary Sludge Fermentation

2011 ◽  
Vol 281 ◽  
pp. 101-105
Author(s):  
Cheng Cheng Wu ◽  
Yong Zhen Peng ◽  
Liang Zhang ◽  
Shu Ying Wang
Keyword(s):  
Carbon Source ◽  
Removal Efficiency ◽  
Nitrogen Removal ◽  
High Performance ◽  
Reduction Potential ◽  
Biological Nitrogen Removal ◽  
Primary Sludge ◽  
Oxidation Reduction ◽  
Oxidation Reduction Potential ◽  
Biological Nitrogen

A novel post-denitrification system fed by carbon source from primary sludge (PS) was used for enhancing biological nitrogen removal (BNR) of low C/N wastewater. This system included one anoxic/oxic (AO) reactor and a special reactor for simultaneous sludge fermentation and denitrification (Sifeden). Ammonia was nitrified to nitrate in AO and then the nitrate was reduced to dinitrogen in Sifeden , into which PS was added intermittently. Results showed that this system had high performance on nitrogen removal. Total nitrogen (TN) removal efficiency was higher than 85% and the effluent TN≤10mg/L in the condition of influent C/N≤2. In Sifeden, volatile fatty acid (VFA) produced from PS fermentation provided electron donor for nitrate reduction, and PS was preliminarily stabilized simultaneously. Oxidation-Reduction Potential (ORP) had a significant correlation with the denitrification performance. TN removal efficiency could be further improved if adopting proper PS addition strategy according to the ORP profiles.

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