Accelerating anammox nitrogen removal in low intensity ultrasound-assisted ASBBR: Performance optimization, EPS characterization and microbial community analysis

2022 ◽  
pp. 152989
Author(s):  
Wei Zhang ◽  
Xin Zhou ◽  
Xiwei Cao ◽  
Shuhan Li
Keyword(s):  
Microbial Community ◽  
Nitrogen Removal ◽  
Performance Optimization ◽  
Community Analysis ◽  
Microbial Community Analysis ◽  
Low Intensity ◽  
Low Intensity Ultrasound ◽  
Ultrasound Assisted ◽  
Eps Characterization

Characterization of microbial community in nitrogen removal process of metallurgic wastewater by PCR-DGGE

2002 ◽  
Vol 46 (11-12) ◽  
pp. 93-98 ◽  
Author(s):  
S. Yoshie ◽  
N. Noda ◽  
T. Miyano ◽  
S. Tsuneda ◽  
A. Hirata ◽  
...  
Keyword(s):  
Microbial Community ◽  
Nitrogen Removal ◽  
Denaturing Gradient Gel Electrophoresis ◽  
Precious Metals ◽  
Community Analysis ◽  
Packed Bed ◽  
Community Diversity ◽  
Industrial Wastes ◽  
Microbial Community Analysis ◽  
Gradient Gel Electrophoresis

The metallurgic wastewater generated from the processes of recovering precious metals from industrial wastes contains high concentrations of nitrogen compounds such as ammonia and nitric acid and of salts such as sodium chloride and sodium sulfate. Biological nitrogen removal from this wastewater was attempted by a circulating bioreactor system equipped with an anoxic packed bed and an aerobic fluidized bed. The anoxic packed bed of this system was found to effectively remove nitrite and nitrate from the wastewater by denitrification at a removal ratio of 97%. As a result of denitrification activity tests at various NaCl concentrations, the sludge obtained from the anoxic packed bed exhibited accumulation of nitrite at 5.0 and 8.4% NaCl concentrations, suggesting that the reduction of nitrite is the key step in the denitrification pathway under hypersaline conditions. The microbial community analysis by denaturing gradient gel electrophoresis (DGGE) of PCR-amplified 16S ribosomal DNA (rDNA) fragments revealed that the community diversity varied in accordance with water temperature, nitrate-loading rate and ionic strength. When particular major DGGE bands were excised, reamplified and directly sequenced, the dominant species in the anoxic packed bed were affiliated with the beta and gamma subclasses of the class Proteobacteria such as Alcaligenes defragrans and Pseudomonas spp., respectively.

Nitrogen removal performance and microbial community analysis of an anaerobic up-flow granular bed anammox reactor

Chemosphere ◽  
2010 ◽  
Vol 78 (9) ◽  
pp. 1129-1135 ◽  
Author(s):  
Sunja Cho ◽  
Yoshitaka Takahashi ◽  
Naoki Fujii ◽  
Yohei Yamada ◽  
Hisashi Satoh ◽  
...  
Keyword(s):  
Microbial Community ◽  
Nitrogen Removal ◽  
Community Analysis ◽  
Microbial Community Analysis ◽  
Granular Bed
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