Biological denitrification of reverse osmosis brine concentrates: I. Batch reactor and chemostat studies

2007 ◽  
Vol 6 (5) ◽  
pp. 503-518 ◽  
Author(s):  
Ilknur Ersever ◽  
Varadarajan Ravindran ◽  
Massoud Pirbazari
Keyword(s):  
Reverse Osmosis ◽  
Batch Reactor ◽  
Biological Denitrification

scholarly journals Nitrate Removal from Wastewater through Biological Denitrification with OGA 24 in a Batch Reactor

Water ◽  
2014 ◽  
Vol 7 (12) ◽  
pp. 51-62 ◽  
Author(s):  
Federico Rossi ◽  
Oriana Motta ◽  
Simona Matrella ◽  
Antonio Proto ◽  
Giovanni Vigliotta
Keyword(s):  
Batch Reactor ◽  
Nitrate Removal ◽  
Biological Denitrification

Biological Denitrification of High Concentration of Nitrate in Batch Reactor

2018 ◽  
Vol 19 (5) ◽  
pp. 406-413
Author(s):  
Jeongdong Choi ◽  
Doo Sik Choi ◽  
Jea Seok Song ◽  
Byung Yeol Cho
Keyword(s):  
Batch Reactor ◽  
High Concentration ◽  
Biological Denitrification

Biological denitrification in a sequencing batch reactor

2004 ◽  
Vol 50 (10) ◽  
pp. 67-72 ◽  
Author(s):  
P. Dangcong ◽  
W. Yi ◽  
W. Hao ◽  
W. Xiaochang
Keyword(s):  
Sequencing Batch Reactor ◽  
Loading Rate ◽  
Batch Reactor ◽  
Granular Sludge ◽  
Filamentous Bacteria ◽  
Microscope Examination ◽  
Biological Denitrification ◽  
Effective Technology ◽  
Nitrate And Nitrite ◽  
Electronic Microscope

Biological denitrification was studied in an SBR to investigate the performance. The experimental results showed that granular sludge with high activity and good settling ability can be developed smoothly in the reactor. With the granular sludge, high nitrate loading rate (0.48 kg NO3-N dm−3 d−1) and removal efficiency (more than 99%) can be achieved. Scanning electronic microscope examination showed that only rod-shape bacteria existed on and within the granules, which confirmed indirectly that filamentous bacteria do not utilize nitrate and nitrite as electron acceptors. SBR is an alternative and effective technology for biological denitrification.

scholarly journals Microbial communities in biological denitrification system using methanol as carbon source for treatment of reverse osmosis concentrate from coking wastewater

2017 ◽  
Vol 8 (3) ◽  
pp. 360-371 ◽  
Author(s):  
Enchao Li ◽  
Xuewen Jin ◽  
Shuguang Lu
Keyword(s):  
Carbon Source ◽  
Microbial Communities ◽  
Reverse Osmosis ◽  
Batch Reactor ◽  
Oxygen Demand ◽  
Nitrite Reduction ◽  
Coking Wastewater ◽  
Bacterial Phyla ◽  
Start Up ◽  
Miseq Platform

Abstract A biological denitrifying process using methanol as a carbon source was employed for the treatment of reverse osmosis concentrate (ROC) from coking wastewater in a sequencing batch reactor (SBR). The results showed that the average removal efficiencies of chemical oxygen demand (COD), total organic carbon, total nitrogen and nitrate were 81.4%, 83.7%, 90.6% and 92.9%, respectively. Different microbial communities were identified on the MiSeq platform, showing that the most abundant bacterial phyla were Proteobacteria and Bacteroidetes, the sum of which, in this study, accounted for almost over 92%. The key genera responsible for denitrification were Hyphomicrobium, Thauera and Methyloversatilis. Quantitative real-time polymerase chain reaction was used to quantify the absolute abundances of microbial genera by using 16S rRNAs and denitrifying genes, such as narG, nirS and nirK, during both start-up and stable operations in the SBR. nirS was much more abundant than nirK, thus became the main functional gene to execute nitrite reduction. The high removal efficiency of COD and nitrate suggests that a biological denitrifying process using SBR is an effective technique for treating ROC from coking wastewater.

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