Treatment of Power Plant Sewage Based on Simultaneous Nitrification and Denitrification in SBR

2012 ◽  
Vol 610-613 ◽  
pp. 2012-2016
Author(s):  
Tao Yang ◽  
Wan You Zhang ◽  
Lan He Zhang ◽  
Pei Ying Wu ◽  
Shuo Yang
Keyword(s):  
Power Plant ◽  
Carbon Source ◽  
Dissolved Oxygen ◽  
Removal Efficiency ◽  
Total Nitrogen ◽  
Simultaneous Nitrification And Denitrification ◽  
Nitrification And Denitrification

A SBR was used to treat power plant sewage based on SND when pH, DO(dissolved oxygen),MLSS, were 7.0-8.0, 0.5-1mg/L, 3000±200mg/L, respectively. Results indicated average removal efficiency of COD and NH4+-N were 89% ,96.34%.Because of low COD/ NH4+-N, average removal efficiency of TN(total nitrogen)was only 71.15%, effect of SND was not apparent. After improving COD/ NH4+-N by adding carbon source intermittently, removal effects of COD and NH4+-N were not reduced, and effluent NO3--N and NO2--N was not accumulated, average removal efficiency of TN was 95%, and efficiency of SND was enhanced obviously. The effluent of system was recycled effectively. It indicates that SBR based on SND is feasible in theory and technology which is applied to treat power plant sewage.

Simultaneous Nitrification and Denitrification in Biofilm-Electrode Reactor

2013 ◽  
Vol 652-654 ◽  
pp. 1633-1636 ◽  
Author(s):  
Xiao Liu ◽  
Mei Yang ◽  
Xian Huai Huang
Keyword(s):  
Dissolved Oxygen ◽  
Electric Current ◽  
Removal Efficiency ◽  
Nitrogen Removal ◽  
Simultaneous Nitrification And Denitrification ◽  
Autotrophic Denitrification ◽  
Effluent Recirculation ◽  
Removal Efficiencies ◽  
Nitrification And Denitrification ◽  
Limited Oxygen

To study the nitrification and denitrification in compartmented biofilm-electrode reactor (C-BER) under limited oxygen, influence of mild electrolysis on nitrogen removal was investigated under low C/N (mole ratios) with dissolved oxygen about 1mg/ L. It was found that nitrogen removal was mainly through simultaneous nitrification and denitrification (SND). C/N ratio was 1, average total nitrogen (TN) removal efficiencies were 33% and 45% for electric current of 5 and 15mA. C/N was 0.5, electric current was 25mA and effluent was recirculated, TN removal efficiency increased to 60%, within which autotrophic denitrification accounted for about 51%. There was about 50% NH3-N reduced under 15mA when C/N ratio was 1, this increased to 70% for 25mA when C/N ratio was 0.5. Nevertheless, TN reduced between anode and cathodes accounted for 64% in all. The experimental results show that both higher electric current and effluent recirculation are good for SND process under oxygen-limited condition, nitrogen removal can be activated by mild electrolysis.

scholarly journals Evaluation of a novel low-carbon to nitrogen- and temperature-tolerant simultaneously nitrifying–denitrifying bacterium and its use in the treatment of river water

RSC Advances ◽  
2018 ◽  
Vol 8 (48) ◽  
pp. 27417-27422 ◽  
Author(s):  
Peng Jin ◽  
Yinyan Chen ◽  
Zhanwang Zheng ◽  
Qizhen Du
Keyword(s):  
Low Temperature ◽  
River Water ◽  
Removal Efficiency ◽  
Nitrogen Removal ◽  
Simultaneous Nitrification And Denitrification ◽  
Low Carbon ◽  
High Nitrogen ◽  
Denitrifying Bacterium ◽  
Nitrification And Denitrification

A novel simultaneous nitrification and denitrification Klebsiella sp. exhibits high nitrogen removal efficiency under low-temperature and low C/N wastewater.

scholarly journals Simultaneous nitrification and denitrification (SND) bioaugmentation with Pseudomonas sp. HJ3 inoculated for enhancing phenol and nitrogen removal in coal gasification wastewater

2019 ◽  
Vol 80 (8) ◽  
pp. 1512-1523
Author(s):  
Weiwei Ma ◽  
Yuxing Han ◽  
Wencheng Ma ◽  
Hongjun Han ◽  
Chunyan Xu ◽  
...  
Keyword(s):  
Removal Efficiency ◽  
Nitrogen Removal ◽  
Coal Gasification ◽  
Oxygen Demand ◽  
Community Analysis ◽  
Microbial Community Analysis ◽  
Simultaneous Nitrification And Denitrification ◽  
Pseudomonas Sp ◽  
Coal Gasification Wastewater ◽  
Nitrification And Denitrification

Abstract A simultaneous nitrification and denitrification (SND) bioaugmention system with Pseudomonas sp. HJ3 inoculated was established to explore the potential of simultaneous phenol and nitrogen removal in coal gasification wastewater (CGW). When the concentration of influent chemical oxygen demand (COD) and total phenols (TPh) was 1,765.94 ± 27.43 mg/L and 289.55 ± 10.32 mg/L, the average removal efficiency of COD and TPh at the stable operating stage reached 64.07% ± 0.76% and 74.91% ± 0.33%, respectively. Meanwhile, the average removal efficiency of NH4+-N and total nitrogen (TN) reached 67.96% ± 0.17% and 57.95% ± 0.12%, respectively. The maximum SND efficiency reached 83.51%. Furthermore, SND bioaugmentation performed with good nitrification tolerance of phenol shock load and significantly reduced toxic inhibition of organisms. Additionally, the microbial community analysis indicated that Pseudomonas sp. HJ3 was the predominant bacterium in the SND bioaugmentation system. Moreover, the indigenous nitrogen removal bacteria such as Thauera, Acidovorax and Stenotrophomonas were enriched, which further enhanced the nitrogen removal in the SND bioaugmentation system. The results demonstrated the promising application of SND bioaugmentation for enhancing simultaneous phenol and nitrogen removal in CGW treatment.

Enhancing nitrogen removal efficiency and reducing nitrate liquor recirculation ratio by improving simultaneous nitrification and denitrification in integrated fixed-film activated sludge (IFAS) process

2015 ◽  
Vol 73 (4) ◽  
pp. 827-834 ◽  
Author(s):  
Yang Bai ◽  
Yaobin Zhang ◽  
Xie Quan ◽  
Shuo Chen
Keyword(s):  
Activated Sludge ◽  
Removal Efficiency ◽  
Nitrogen Removal ◽  
Denaturing Gradient Gel Electrophoresis ◽  
Electricity Consumption ◽  
Simultaneous Nitrification And Denitrification ◽  
Recirculation Flow ◽  
Fixed Film ◽  
Gradient Gel Electrophoresis ◽  
Nitrification And Denitrification

An integrated fixed-film activated sludge (IFAS) process (G1) and an activated sludge anoxic–oxic process (G2) were operated at nitrate liquor recirculation ratio (R) of 100, 200 and 300% to investigate the feasibility of enhancing nitrogen removal efficiency (RTN) and reducing R by improving simultaneous nitrification and denitrification (SND) in the IFAS process. The results showed that the effluent NH4+-N and total nitrogen (TN) of G1 at R of 200% were less than 1.5 and 14.5 mg/L, satisfying the Chinese discharge standard (NH4+-N < 5 mg/L; TN < 15 mg/L). However, the effluent NH4+-N and TN of G2 at R of 300% were higher than 8.5 and 15.3 mg/L. It indicated that better RTN could be achieved at a lower R in the IFAS process. The polymerase chain reaction–denaturing gradient gel electrophoresis results implied that nitrifiers and denitrifiers co-existed in one microbial community, facilitating the occurrence of SND in the aerobic reactor of G1, and the contribution of SND to TN removal efficiency ranged 15–19%, which was the main reason that the RTN was improved in the IFAS process. Therefore, the IFAS process was an effective method for improving RTN and reducing R. In practical application, this advantage of the IFAS process can decrease the electricity consumption for nitrate liquor recirculation flow, thereby saving operational costs.

Achieving simultaneous nitrification and denitrification of wastewaters at reduced cost

1995 ◽  
Vol 32 (9-10) ◽  
pp. 303-312 ◽  
Author(s):  
Mike O'Neill ◽  
Nigel J. Horan
Keyword(s):  
Dissolved Oxygen ◽  
Electron Acceptor ◽  
Nitrogen Removal ◽  
Lag Time ◽  
Simultaneous Nitrification And Denitrification ◽  
Waste Waters ◽  
Mediterranean Environment ◽  
Dissolved Oxygen Concentration ◽  
Terminal Electron Acceptor ◽  
Nitrification And Denitrification

The Orbal process for the treatment of waste waters, claims simultaneous nitrification and denitrification in the outer lane in the presence of a dissolved oxygen concentration of 1.5 mg/l. The potential of this process is to offer both a reduced cost and simplified operation for nitrogen removal in the Mediterranean environment. The objective of this work was to investigate these claims and attempt to describe a mechanism for the experimental verifications. Using mixed cultures grown in chemostats, simultaneous nitrification and denitrification was observed under oxic/anoxic cycling. A reduced pathway, or ‘nitrite shunt’ could not be demonstrated but it was possible to explain the observations based on the lag time of the denitrifiers under oxic conditions. Denitrification continued for some time before oxygen replaced nitrate as the terminal electron acceptor and the length of the lagged response was a function of the duration of the anoxic conditions.

Simultaneous nitrification and denitrification using a polypyrrole/microbial cellulose electrode in a membraneless bio-electrochemical system

RSC Advances ◽  
2015 ◽  
Vol 5 (89) ◽  
pp. 72699-72708 ◽  
Author(s):  
Hooshyar Hossini ◽  
Abbas Rezaee ◽  
Bita Ayati ◽  
Amir Hossein Mahvi
Keyword(s):  
Aqueous Solution ◽  
Total Nitrogen ◽  
Nitrogen Removal ◽  
Simultaneous Nitrification And Denitrification ◽  
Electrochemical System ◽  
Microbial Cellulose ◽  
System P ◽  
Total Nitrogen Removal ◽  
Nitrification And Denitrification ◽  
Denitrification Process

In this study, the feasibility of ammonium and total nitrogen removal from aqueous solution using a simultaneous nitrification and denitrification process was studied in a membraneless bio-electrochemical system with a novel electrode.

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