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Water 2017, 9(11), 835; https://doi.org/10.3390/w9110835

Heterotrophic Nitrification-Aerobic Denitrification Performance of Strain Y-12 under Low Temperature and High Concentration of Inorganic Nitrogen Conditions

1
Chongqing Key Laboratory of Soil Multiscale Interfacial Progress, College of Resource and Environments, Southwest University, Chongqing 400716, China
2
School of Chemical Engineering, University of Queensland, Brisbane, Queensland 4072, Australia
*
Author to whom correspondence should be addressed.
Received: 12 September 2017 / Revised: 15 October 2017 / Accepted: 27 October 2017 / Published: 30 October 2017
(This article belongs to the Special Issue Biological Treatment of Wastewater)
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Abstract

An aerobic nitrite-denitrifying bacterium Pseudomonas putida Y-12 was used to remove sole and mixed nitrogen sources at 15 °C. When strain Y-12 was incubated for 4 days with a sole nitrogen source and initial NH4+-N, NO3-N, and NO2-N concentrations of 208.1, 204.7, and 199.0 mg/L, respectively, the removal ratios of NH4+-N, NO3-N, and NO2-N were 98.8, 73.6, and 77.1%, respectively. The average removal rates of NH4+-N, NO3-N, and NO2-N reached 2.14, 1.57, and 1.60 mg/L/h, respectively. Intermediate products (NO3-N and NO2-N) were detected at a low level. Total nitrogen removal was mainly achieved during the stationary phase in the denitrification process. All the results indicated that strain Y-12 could perform heterotrophic nitrification and aerobic denitrification at 15 °C, which was beneficial for future applications in wastewater treatment at low temperatures. View Full-Text
Keywords: psychrotolerant; nitrite-denitrifying; pseudomonas putida; simultaneous heterotrophic nitrification and denitrification; wastewater treatment psychrotolerant; nitrite-denitrifying; pseudomonas putida; simultaneous heterotrophic nitrification and denitrification; wastewater treatment
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Ye, Q.; Li, K.; Li, Z.; Xu, Y.; He, T.; Tang, W.; Xiang, S. Heterotrophic Nitrification-Aerobic Denitrification Performance of Strain Y-12 under Low Temperature and High Concentration of Inorganic Nitrogen Conditions. Water 2017, 9, 835.

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