A Novel Simultaneous Partial Nitritation, Denitratation and Anammox (SPNDA) Process in Sequencing Batch Reactor for Advanced Nitrogen Removal from Ammonium and Nitrate Wastewater

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.

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Advanced Nitrogen Removal Via Intracellular Polymers in a Post-denitrification Sequencing Batch Reactor (SBR)

2013 Third International Conference on Intelligent System Design and Engineering Applications ◽

10.1109/isdea.2012.60 ◽

2013 ◽

Cited By ~ 1

Author(s):

Zhu Ru-Long ◽

Wang Shu-Ying ◽

Wang Kai ◽

Gong Ling-Xiao ◽

Miao Lei

Keyword(s):

Nitrogen Removal ◽

Sequencing Batch Reactor ◽

Batch Reactor ◽

Advanced Nitrogen Removal

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The benefits of autotrophic nitrogen removal from high concentration of urea wastewater through a process of urea hydrolysis and partial nitritation in sequencing batch reactor

Journal of Environmental Management ◽

10.1016/j.jenvman.2021.112762 ◽

2021 ◽

Vol 292 ◽

pp. 112762

Author(s):

Yongxing Chen ◽

Haochuan Chen ◽

Zhenguo Chen ◽

Haolin Hu ◽

Cuilan Deng ◽

...

Keyword(s):

Nitrogen Removal ◽

Sequencing Batch Reactor ◽

Batch Reactor ◽

Urea Hydrolysis ◽

High Concentration ◽

Partial Nitritation ◽

Urea Wastewater ◽

Autotrophic Nitrogen Removal

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Nitrogen Removal for Liquid-Ammonia Mercerization Wastewater via Partial Nitritation/Anammox Based on Zeolite Sequencing Batch Reactor

Water ◽

10.3390/w12082234 ◽

2020 ◽

Vol 12 (8) ◽

pp. 2234

Author(s):

Lei Zheng ◽

Yongxing Chen ◽

Songwei Zhou ◽

Yuchen Chen ◽

Xingxing Wang ◽

...

Keyword(s):

Nitrogen Removal ◽

Textile Industry ◽

Liquid Ammonia ◽

Sequencing Batch Reactor ◽

Batch Reactor ◽

Ammonia Removal ◽

Nitrogen Loading ◽

Nitrite Accumulation ◽

Sequencing Analysis ◽

Partial Nitritation

Liquid-ammonia mercerization is commonly used to enhance the quality of cotton fabric in the textile industry, resulting in a large amount of liquid-ammonia mercerization wastewater (LMWW) containing high concentration of ammonia to be disposed of. This study proposes a partial nitritation/anammox (PN/A) process based on stable nitritation by a zeolite sequencing batch reactor (ZSBR) for the nitrogen removal of LMWW. The ZSBR could quickly achieve stably full nitritation with a nitrite accumulation ratio higher than 97% and an ammonia removal rate of 0.86 kg N·m−3·d−1 for the raw LMWW with an ammonia level of 1490 mg/L. In order to avoid anammox inhibition by free nitrous acid, the ZSBR was successfully changed to PN operation with diluted LMWW for effluent meeting anammox requirements. The next anammox reactor (an up-flow blanket filter (UBF)) realized a total nitrogen removal efficiency of 70.0% with a NLR (nitrogen loading rate) of 0.82 kg N·m−3·d−1 for LMWW. High-throughput sequencing analysis results indicated that Nitrosomonas and Candidatus Kuenenia were the dominant bacteria in ZSBR and UBF, respectively. All results revealed that the PN/A process based on ZSBR as the PN pretreatment process was feasible for LMWW, facilitating cost-effective and low-carbon nitrogen removal for LMWW treatment in the textile industry in the future.

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