The characteristics of nitrate removal by the psychrotolerant denitrifying bacteriumAcinetobacter johnoniiDBP-3, isolated from a low-temperature eutrophic body of water

2013 ◽  
Vol 48 (10) ◽  
pp. 885-892 ◽  
Author(s):  
Ming T. Li ◽  
Jin H. Liu ◽  
Shu J. Zhao ◽  
Zhang X. Wang ◽  
Lin L. Hao
2021 ◽  
Vol 755 ◽  
pp. 143023
Author(s):  
Maria Hellman ◽  
Valerie Hubalek ◽  
Jaanis Juhanson ◽  
Robert Almstrand ◽  
Sari Peura ◽  
...  

2012 ◽  
Vol 518-523 ◽  
pp. 406-410 ◽  
Author(s):  
Yun Hao ◽  
Xiu Guang Jiang ◽  
Qing Tian ◽  
Ai Yin Chen ◽  
Bao Ling Ma

In this study, a scientific method which can be used to improve nitrification process at low temperature in the sewage treatment plant was introduced. The activated sludge samples were taken from aeration tank of the sewage treatment plant when the outside temperature was below 0°C (water temperature below 12 °C). Five kinds of nitrobacteria strains with cold-resistance and higher activity of ammonia degradation were isolated from aeration tanks. The physiological properties showed the five strains were identified into Sphingobacteriaceae、Rhodanobacter sp.、Pseudomonas sp.、Pandoraea sp. and Perlucidibaca piscinae. All of the strains could convert ammonia-nitrogen or NO2- into NO3- in the medium at 10°C. The ammonia and nitrate removal efficiency could be reached 80.9% and 80.3% respectively. Comparing to the unvaccinated one, the removal efficiency can be increased by 50%, which proved the isolated nitrobacteria could be applied to biological nitrification process of sewage treatment at low-temperature.


2014 ◽  
Vol 501-504 ◽  
pp. 2089-2092
Author(s):  
Hai Hong Zhou ◽  
Fang He

A kind of controlled-release carbon source, starch / polyvinyl alcohol blends (SPVA), was used as both carbon source and biofilm supporter in laboratory-scale fluidized-bed biofilm reactors (FBBRs) to remove nitrate from groundwater. Results show: when the influent nitrate concentration was 100 mg-N /L, FBBRs packed with SPVA can effectively remove nitrate from groundwater at the condition of temperature 20 °C, hydraulic resident time (HRT) 4 h. The effluent nitrate can meet with the Chinese drinking water standards at low temperature (15-2 °C) by adjusted the HRT of FBBRs. The denitrification rate declined nonlinearly with the decrease of temperature and changed sharply in the range of 20-15 °Cand 10-5 °C.


2021 ◽  
Vol 326 ◽  
pp. 124794
Author(s):  
Duoying Zhang ◽  
Ying Liu ◽  
Yaxi Han ◽  
Yanlong Zhang ◽  
Xuebin Jia ◽  
...  

2018 ◽  
Vol 47 (4) ◽  
pp. 856-864 ◽  
Author(s):  
Marta B. Roser ◽  
Gary W. Feyereisen ◽  
Kurt A. Spokas ◽  
David J. Mulla ◽  
Jeffrey S. Strock ◽  
...  

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Tengxia He ◽  
Qing Ye ◽  
Quan Sun ◽  
Xi Cai ◽  
Jiupai Ni ◽  
...  

Low temperatures and high pH generally inhibit the biodenitrification. Thus, it is important to explore the psychrotrophic and alkali-resisting microorganism for degradation of nitrogen. This research was mainly focused on the identification of a psychrotrophic strain and preliminary explored its denitrification characteristics. The new strain J was isolated using the bromothymol blue solid medium and identified as Pseudomonas taiwanensis on the basis of morphology and phospholipid fatty acid as well as 16S rRNA gene sequence analyses, which is further testified to work efficiently for removing nitrate from wastewater at low temperature circumstances. This is the first report that Pseudomonas taiwanensis possessed excellent tolerance to low temperature, with 15°C as its optimum and 5°C as viable. The Pseudomonas taiwanensis showed unusual ability of aerobic denitrification with the nitrate removal efficiencies of 100% at 15°C and 51.61% at 5°C. Single factor experiments showed that the optimal conditions for denitrification were glucose as carbon source, 15°C, shaking speed 150 r/min, C/N 15, pH≥7, and incubation quantity 2.0 × 106 CFU/mL. The nitrate and total nitrogen removal efficiencies were up to 100% and 93.79% at 15°C when glucose is served as carbon source. These results suggested that strain J had aerobic denitrification ability, as well as the notable ability to tolerate the low temperature and high pH.


Author(s):  
Arnaud Jéglot ◽  
Kirk Matthew Schnorr ◽  
Sebastian Reinhold Sørensen ◽  
Lars Elsgaard

Nitrate removal was enhanced by the addition of isolated and pre-grown psychrotolerant denitrifiers at low temperature (5 °C).


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