Achieving biogas production and efficient pollutants removal from nitrogenous fertilizer wastewater using combined anaerobic digestion and autotrophic nitrogen removal process

PCR-DGGE was applied to analyze the relationship between pH and the microbial community structure of Sequence Batch Biofilm Reactor (SBBR) autotrophic nitrogen removal process. The reactor was possessed of a high nitrogen removal efficiency at pH=8.0 where the similarity of microbial community structure between active sludge and biofilm samples was the lowest about 84.6% and the richness of bacterial community was the most abundant in biofilm compared with other pH conditions. pH=7.0 was good for the microbes in active sludge but unfavorable for anaerobic bacteria. At pH=9.0, the effects were presented with both bacterial activities and microbial community structure and when pH=6.0 the amount of microbial types dramatically dropped

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Partial Nitrification in Microaerobic Tank of “Anoxic-Anaerobic- Microaerobic-Aerobic (A2O2)” Biological Nitrogen Removal Process

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.295-298.1039 ◽

2013 ◽

Vol 295-298 ◽

pp. 1039-1044 ◽

Cited By ~ 1

Author(s):

Jian Lei Gao ◽

Bing Nan Lv ◽

Yi Xin Yan ◽

Jian Ping Wu

Keyword(s):

Nitrogen Removal ◽

Removal Rate ◽

Pilot Scale ◽

Partial Nitrification ◽

Biological Nitrogen Removal ◽

Nitrogenous Fertilizer ◽

Removal Process ◽

Batch Tests ◽

N Removal ◽

Biological Nitrogen

The pilot-scale Anoxic-Anaerobic-Microaerobic-Aerobic (A2O2) biological nitrogen removal process was used to treat the wastewater from nitrogenous fertilizer production with C/N ratio of 1~2. Batch tests were conducted to investigate the patial nitrification using the activated sludge from the microaerobic tank rich in nitrite bacteria as the experimental object. Results showed that 95% removal efficiency of NH3-N could be obtained with the HRT of 30 h. The SVI affected the NH3-N removal rate and the optimal SVI was 106 mL/g. The ORP was well correlated with the logarithm of NH3-N concentration with the linear regression equation of y=-57.233x+3.308. Moreover, the kinetic model for partial nitrification was determined as v=4.762s/(9.86+s).

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Model-based evaluation of the contribution of partial denitrification (PD) on the one-stage autotrophic nitrogen removal process

10.21203/rs.3.rs-179960/v1 ◽

2021 ◽

Author(s):

Chi Zhang ◽

Lianze Yu ◽

Miao Zhang ◽

Jun Wu

Keyword(s):

Nitrogen Removal ◽

Oxygen Demand ◽

Anammox Bacteria ◽

Removal Process ◽

One Stage ◽

Biofilm Model ◽

Nitrite Oxidizing Bacteria ◽

The One ◽

Steady State Simulation ◽

Autotrophic Nitrogen Removal

Abstract The nitrate produced by the one-stage partial nitritation-anammox (PN/A) process can be removed through partial denitrification (PD) by adding carbon source. In this study, a 1D multi-population biofilm model was developed to evaluate the contribution of partial denitrification on the one-stage autotrophic nitrogen removal process at influent NH4+ = 100 mg N/L. The dynamic simulation that was carried out to investigate the effect of nitrite-oxidizing bacteria (NOB) revealed that PD contributed to the reactor to obtain total nitrogen removal efficiency (TNR) of above 90% and the effluent nitrate was significantly decreased with the absence of NOB. However, PD decreased TNR of the one-stage PN/A process with the presence of NOB. Increased influent chemical oxygen demand (COD) widened the dissolved oxygen (DO) range required for high TNR whether NOB were present or not. The steady-state simulation results showed that NOB were always absent in the granules at high DO and COD levels and the optimum DO > 0.5 mg/L when influent COD was over 50 mg/L. Besides, higher influent COD/NH4+ (C/N) and larger granule diameter (diameter > 1600 µm) were contributed to widening the range of DO required for high TNR. The nitrogen removal contribution of anammox bacteria (AMX) was significantly higher than denitrification in the reactor.

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Single-stage autotrophic nitrogen removal process at high loading rate: granular reactor performance, kinetics, and microbial characterization

Applied Microbiology and Biotechnology ◽

10.1007/s00253-018-8768-0 ◽

2018 ◽

Vol 102 (5) ◽

pp. 2379-2389 ◽

Cited By ~ 3

Author(s):

Feiyue Qian ◽

Abebe Temesgen Gebreyesus ◽

Jianfang Wang ◽

Yaoliang Shen ◽

Wenru Liu ◽

...

Keyword(s):

Nitrogen Removal ◽

Loading Rate ◽

Single Stage ◽

High Loading ◽

Reactor Performance ◽

Removal Process ◽

High Loading Rate ◽

Microbial Characterization ◽

Autotrophic Nitrogen Removal

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Autotrophic nitrogen removal process in a potable water treatment biofilter that simultaneously removes Mn and NH 4 + -N

Bioresource Technology ◽

10.1016/j.biortech.2014.09.027 ◽

2014 ◽

Vol 172 ◽

pp. 226-231 ◽

Cited By ~ 11

Author(s):

Yan’an Cai ◽

Dong Li ◽

Yuhai Liang ◽

Huiping Zeng ◽

Jie Zhang

Keyword(s):

Water Treatment ◽

Nitrogen Removal ◽

Potable Water ◽

Removal Process ◽

Autotrophic Nitrogen Removal ◽

Potable Water Treatment

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Biochemical characteristic along UBAF in a one-stage autotrophic nitrogen removal reactor

Water Science & Technology ◽

10.2166/wst.2016.443 ◽

2016 ◽

Vol 74 (11) ◽

pp. 2656-2665

Author(s):

Tao Liu ◽

Dong Li ◽

Jie Zhang

Keyword(s):

Species Identification ◽

Nitrogen Removal ◽

Biochemical Characteristic ◽

Pollutant Removal ◽

Biological Aerated Filter ◽

Removal Process ◽

One Stage ◽

Functional Bacteria ◽

Aerated Filter ◽

Autotrophic Nitrogen Removal

The Up-flow biological aerated filter (UBAF) based on a one-stage autotrophic nitrogen removal process has been widely investigated nowadays. In this work, the biochemical characteristic along the volcanic-filled UBAF reactor had been studied. The results indicate that short-rod, spherical and elliptical (averaged 0.2–1.0 μm) microorganisms with a specific irregular cauliflower profile existed in the system. Species identification showed Nitrosococcus- and Nitrosomonas-related aerobic ammonium-oxidizing bacteria (AerAOB) and Candidatus Kuenenia stuttgartiensis-like anaerobic ammonium-oxidizing bacteria (AnAOB) were the predominant functional bacteria that mixed with each other and showed no distinct niche in the system. However, the bioactivity of functional microorganisms displayed differently at different filter layers, with a better pollutant-removal activity in the lower parts than in the upper parts of the UBAF. In the lower parts, compact and small zooglea formed, whereas it trended to be larger and looser along the filter. Moreover, there was better biodiversity of AerAOB in the lower part, while AnAOB showed stable and low biodiversity along the filter.

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