scholarly journals In-situ restoration of one-stage partial nitritation-anammox process deteriorated by nitrate build-up via elevated substrate levels

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Xiaolong Wang ◽  
Dawen Gao
Keyword(s):  
Partial Nitritation ◽  
One Stage ◽  
Anammox Process

Granular biomass capable of partial nitritation and anammox

2008 ◽  
Vol 58 (5) ◽  
pp. 1113-1120 ◽  
Author(s):  
S. E. Vlaeminck ◽  
L. F. F. Cloetens ◽  
M. Carballa ◽  
N. Boon ◽  
W. Verstraete
Keyword(s):  
Removal Rate ◽  
Batch Reactor ◽  
Ammonium Oxidation ◽  
Autotrophic Nitrification ◽  
Partial Nitritation ◽  
One Stage ◽  
Biomass Retention ◽  
Granular Biomass ◽  
The One

A novel and efficient way of removing nitrogen from wastewater poor in biodegradable organic carbon, is the combination of partial nitritation and anoxic ammonium oxidation (anammox), as in the one-stage oxygen-limited autotrophic nitrification/denitrification (OLAND) process. Since anoxic ammonium-oxidizing bacteria grow very slowly, maximum biomass retention in the reactor is required. In this study, a lab-scale sequencing batch reactor (SBR) was used to develop granular, rapidly settling biomass. With SBR cycles of one hour and a minimum biomass settling velocity of 0.7 m/h, OLAND granules were formed in 1.5 months and the nitrogen removal rate increased from 50 to 450 mg N L−1 d−1 in 2 months. The granules had a mean diameter of 1.8 mm and their aerobic and anoxic ammonium-oxidizing activities were well equilibrated to perform the OLAND reaction. Fluorescent in-situ hybridization (FISH) demonstrated the presence of both β-proteobacterial aerobic ammonium oxidizers and planctomycetes (among which anoxic ammonium oxidizers) in the granules. The presented results show the applicability of rapidly settling granular biomass for one-stage partial nitritation and anammox.

The performance of freshwater one-stage partial nitritation/anammox process with the increase of salinity up to 3.0%

2020 ◽  
Vol 311 ◽  
pp. 123489 ◽  
Author(s):  
Yan Guo ◽  
Takumi Sugano ◽  
Ying Song ◽  
Chenglei Xie ◽  
Yujie Chen ◽  
...  
Keyword(s):  
Partial Nitritation ◽  
One Stage ◽  
Anammox Process

scholarly journals Deciphering the evolution of the functional genes and microbial community of the combined partial nitritation-anammox process with nitrate build-up and its in situ restoration

RSC Advances ◽  
2016 ◽  
Vol 6 (113) ◽  
pp. 111702-111712 ◽  
Author(s):  
Yuanyue Wang ◽  
Hongyan Wang ◽  
Junya Zhang ◽  
Li Yao ◽  
Yuansong Wei
Keyword(s):  
Microbial Community ◽  
Retention Time ◽  
Functional Genes ◽  
Partial Nitritation ◽  
Sludge Retention Time ◽  
Anammox Process

The operation of a combined partial nitritation-anammox (CPNA) process was hampered by the overgrowth of NOB, which was then successfullyin siturestored by the combination of hydroxylamine (NH2OH) dosing and sludge retention time (SRT) control.

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