Nitrate removal from low C/N wastewater at low temperature by immobilized Pseudomonas sp. Y39-6 with versatile nitrate metabolism pathways

2021 ◽  
Vol 326 ◽  
pp. 124794
Author(s):  
Duoying Zhang ◽  
Ying Liu ◽  
Yaxi Han ◽  
Yanlong Zhang ◽  
Xuebin Jia ◽  
...  
Keyword(s):  
Low Temperature ◽  
Nitrate Removal ◽  
Pseudomonas Sp ◽  
Nitrate Metabolism

Nitrate removal by alkali-resistant Pseudomonas sp. XS-18 under aerobic conditions: Performance and mechanism

2021 ◽  
pp. 126175
Author(s):  
Lilong Yan ◽  
Caixu Wang ◽  
Jishuang Jiang ◽  
Shuang Liu ◽  
Yaoqi Zheng ◽  
...  
Keyword(s):  
Nitrate Removal ◽  
Pseudomonas Sp ◽  
Aerobic Conditions ◽  
Performance And Mechanism

scholarly journals Substrate type determines microbial activity and community composition in bioreactors for nitrate removal by denitrification at low temperature

2021 ◽  
Vol 755 ◽  
pp. 143023
Author(s):  
Maria Hellman ◽  
Valerie Hubalek ◽  
Jaanis Juhanson ◽  
Robert Almstrand ◽  
Sari Peura ◽  
...  
Keyword(s):  
Low Temperature ◽  
Microbial Activity ◽  
Community Composition ◽  
Nitrate Removal ◽  
Substrate Type

Isolation and Identification of Nitrobacteria Adapted to Low Temperature

2012 ◽  
Vol 518-523 ◽  
pp. 406-410 ◽  
Author(s):  
Yun Hao ◽  
Xiu Guang Jiang ◽  
Qing Tian ◽  
Ai Yin Chen ◽  
Bao Ling Ma
Keyword(s):  
Low Temperature ◽  
Removal Efficiency ◽  
Nitrate Removal ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Ammonia Nitrogen ◽  
Aeration Tank ◽  
Isolation And Identification ◽  
Nitrification Process

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.

Nitrate Removal of Fluidized-Bed Biofilm Reactors Using Starch / Polyvinyl Alcohol Blends as Carbon Source and Carrier Simultaneously at Low Temperature

2014 ◽  
Vol 501-504 ◽  
pp. 2089-2092
Author(s):  
Hai Hong Zhou ◽  
Fang He
Keyword(s):  
Drinking Water ◽  
Controlled Release ◽  
Low Temperature ◽  
Carbon Source ◽  
Polyvinyl Alcohol ◽  
Fluidized Bed ◽  
Nitrate Concentration ◽  
Nitrate Removal ◽  
Biofilm Reactors ◽  
Resident Time

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.

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