Sludge fermentation liquid addition attained advanced nitrogen removal in low C/N ratio municipal wastewater through short-cut nitrification-denitrification and partial anammox

2020 ◽  
Vol 15 (2) ◽  
Author(s):  
Shengjie Qiu ◽  
Jinjin Liu ◽  
Liang Zhang ◽  
Qiong Zhang ◽  
Yongzhen Peng
Keyword(s):  
Nitrogen Removal ◽  
Municipal Wastewater ◽  
Fermentation Liquid ◽  
Advanced Nitrogen Removal

Advanced nitrogen removal via nitrite from municipal wastewater in a pilot-plant sequencing batch reactor

2009 ◽  
Vol 59 (12) ◽  
pp. 2371-2377 ◽  
Author(s):  
Q. Yang ◽  
X. H. Liu ◽  
Y. Z. Peng ◽  
S. Y. Wang ◽  
H. W. Sun ◽  
...  
Keyword(s):  
Carbon Source ◽  
Process Control ◽  
Removal Efficiency ◽  
Nitrogen Removal ◽  
Pilot Plant ◽  
Sequencing Batch Reactor ◽  
Municipal Wastewater ◽  
Batch Reactor ◽  
Nitrite Accumulation ◽  
Advanced Nitrogen Removal

To obtain economically sustainable wastewater treatment, advanced nitrogen removal from municipal wastewater and the feasibility of achieving and stabilizing short-cut nitrification and denitrification were investigated in a pilot-plant sequencing batch reactor (SBR) with a working volume of 54 m3. Advanced nitrogen removal, from summer to winter, with effluent TN lower than 3 mg/L and nitrogen removal efficiency above 98% was successfully achieved in pulsed-feed SBR. Through long-term application of process control in pulsed-feed SBR, nitrite accumulation reached above 95% at normal temperature of 25°C. Even in winter, at the lowest temperature of 13°C, nitrite was still the end production of nitrification and nitrite accumulation was higher than 90%. On the basis of achieving advanced nitrogen removal, short-cut nitrification and denitrification was also successfully achieved. Compare to the pulse-feed SBR with fixed time control, the dosage of carbon source and energy consumption in pulsed-feed SBR with process control were saved about 30% and 15% respectively. In pulsed-feed SBR with process control, nitrogen removal efficiency was greatly improved. Moreover, consumption of power and carbon source was further saved.

scholarly journals Bibliometric Analysis of Research Trends Related to Carbon Sources for Nitrogen Removal in Wastewater Treatment

2022 ◽  
Author(s):  
Yuan Li ◽  
Jin Ni ◽  
Feng Liu ◽  
Wenbin Zhu ◽  
Chuanfu Wu ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Bibliometric Analysis ◽  
Nitrogen Removal ◽  
Municipal Wastewater ◽  
Agricultural Waste ◽  
Carbon Sources ◽  
Future Research ◽  
Organic Carbon Content ◽  
Fermentation Liquid ◽  
The Usa

Abstract The low organic carbon content of municipal wastewater weakens the effectiveness of biological nitrogen removal. Here, we review recent trends in carbon sources for nitrogen removal during wastewater treatment. A bibliometric analysis, using the Science Citation Index Expanded database from the Web of Science, was performed to analyze articles published in this field from 2000 to 2019. The major points are the following: (1) the publications from China ranked 1st, followed by the USA and Japan during the statistical period. In terms of research institutions, the Chinese Academy of Sciences was the largest contributor with the most publications. (2) Based on the trend analysis of keywords, future research hotspots are discussed, showing that of the related research on external carbon sources, the research focus on traditional carbon sources (methanol, ethanol, etc.) has decreased. The research focused on alternative carbon sources, such as sludge hydrolytic acidification liquid, fermentation liquid of food waste, agricultural waste, and biodegradable polymers, has increased. (3) New nitrogen removal technologies without external carbon sources, such as anammox is becoming increasingly popular. (4) In the study of nitrogen removal, more attention is paid to the change in the microbial community, and the biological mechanism of nitrogen removal is discussed from a microscopic perspective.

scholarly journals Light as a Novel Inhibitor of Nitrite-Oxidizing Bacteria (NOB) for the Mainstream Partial Nitrification of Wastewater Treatment

Processes ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 346
Author(s):  
Keugtae Kim ◽  
Yong-Gyun Park
Keyword(s):  
Wastewater Treatment ◽  
Blue Light ◽  
Nitrogen Removal ◽  
Municipal Wastewater ◽  
Partial Nitrification ◽  
Biological Nutrient Removal ◽  
Nitrite Accumulation ◽  
Light Illumination ◽  
Ammonia Oxidizing Bacteria ◽  
Nitrite Oxidizing Bacteria

Conventional biological nutrient removal processes in municipal wastewater treatment plants are energy-consuming, with oxygen supply accounting for 45–75% of the energy expenditure. Many recent studies examined the implications of the anammox process in sidestream wastewater treatment to reduce energy consumption, however, the process did not successfully remove nitrogen in mainstream wastewater treatment with relatively low ammonia concentrations. In this study, blue light was applied as an inhibitor of nitrite-oxidizing bacteria (NOB) in a photo sequencing batch reactor (PSBR) containing raw wastewater. This simulated a biological nitrogen removal system for the investigation of its application potential in nitrite accumulation and nitrogen removal. It was found that blue light illumination effectively inhibited NOB rather than ammonia-oxidizing bacteria due to their different sensitivity to light, resulting in partial nitrification. It was also observed that the NOB inhibition rates were affected by other operational parameters like mixed liquor suspended solids (MLSS) concentration and sludge retention time (SRT). According to the obtained results, it was concluded that the process efficiency of partial nitrification and anammox (PN/A) could be significantly enhanced by blue light illumination with appropriate MLSS concentration and SRT conditions.

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