scholarly journals Nitrate Removal from Groundwater with Membrane Bioreactor

2017 ◽  
Author(s):  
Marjana Simonič ◽  
Andreja Goršek ◽  
Aleksandra Petrovič
Keyword(s):  
Membrane Bioreactor ◽  
Nitrate Removal

Incorporating membrane gas diffusion into a membrane bioreactor for hydrogenotrophic denitrification of groundwater

2005 ◽  
Vol 51 (6-7) ◽  
pp. 357-364 ◽  
Author(s):  
H. Mo ◽  
J.A. Oleszkiewicz ◽  
N. Cicek ◽  
B. Rezania
Keyword(s):  
Hollow Fiber ◽  
Membrane Bioreactor ◽  
Hollow Fiber Membrane ◽  
Nitrate Removal ◽  
Gas Diffusion ◽  
Hydrogen Gas ◽  
Membrane Module ◽  
Permeable Membrane ◽  
Loading Rates ◽  
Doc Concentration

A hydrogenotrophic denitrification system, comprising a suspended growth membrane bioreactor (MBR) with membrane hydrogen gas diffusion, was developed to remove nitrate from groundwater. A hollow fiber gas permeable membrane module was designed for hydrogen delivery and a commercially available hollow fiber membrane module was used for solid/liquid separation. The MBR was operated at an SRT of 20 days and at room temperature. Four nitrate loading rates of 24, 48, 96 and 192 NO3−-N mg l−1 d−1 were applied to the system. As the nitrate loading was raised, pH increased due to increased denitrification and release of OH− ions. The oxidation reduction potential (ORP) remained fairly stable when full denitrification was achieved, but increased when nitrate loading rates reached 192 NO3−-N mg l−1 d−1 and residual nitrate was present in the reactor. Nitrate removal was complete (100%) in the first three nitrate loadings and 72% in the system with 192 NO3−-N mg l−1 d−1. Nitrate utilization rates of 30.6, 23.4, and 37.7 g NO3−-N m−3 d−1 were achieved in the first three loadings. Average effluent dissolved organic carbon (DOC) concentration of approximately 8 mg l−1 was observed in all four nitrate loading regimes, possibly owing to the generation and release of soluble microbial bi-products (SMP).

scholarly journals The efficiency of a membrane bioreactor in drinking water denitrification

2015 ◽  
Vol 21 (2) ◽  
pp. 269-275
Author(s):  
Aleksandra Petrovic ◽  
Marjana Simonic
Keyword(s):  
Drinking Water ◽  
Flow Rate ◽  
Membrane Bioreactor ◽  
Nitrate Removal ◽  
Maximum Flow ◽  
Pilot Scale ◽  
Operational Parameters ◽  
Flow Rates ◽  
Removal Capacity ◽  
Removal Efficiencies

The membrane bioreactor (MBR) system was investigated regarding its nitrate removal capacity from drinking water. The performance of a pilot-scale MBR was tested, depending on the operational parameters, using sucrose as a carbon source. Drinking water from the source was introduced into the reactor in order to study the influence of flow-rate on the nitrate removal and denitrification efficiency of drinking water. The content of the nitrate was around 70 mg/L and the C/N ratio was 3:1. Nitrate removal efficiencies above 90% were obtained by flow-rates lower than 4.8 L/h. The specific denitrification rates varied between 0.02 and 0.16 g/L NO3/ (g/L MLSS?d). The efficiencies and nitrate removal were noticeably affected by the flow-rate and hydraulic retention times. At the maximum flow-rate of 10.2 L/h still 68% of the nitrate had been removed, whilst the highest specific denitrification rate was achieved at 0.2738 g/L NO3/ (g/L) MLSS?d). The maximum reactor removal capacity was calculated at 8.75 g NO3/m3?h.

Enhanced nitrate removal and fouling behavior in a denitrifying membrane bioreactor: impacts of carbon source and C/N ratio

2020 ◽  
Vol 207 ◽  
pp. 86-98
Author(s):  
Zhaozhao Wang ◽  
Peng Gao ◽  
Lina Yan ◽  
Chunyu Yin ◽  
Simin Li
Keyword(s):  
Carbon Source ◽  
Membrane Bioreactor ◽  
Nitrate Removal

Drinking water denitrification in a membrane bioreactor

1994 ◽  
Vol 30 (6) ◽  
pp. 157-160 ◽  
Author(s):  
B. Delanghe ◽  
F. Nakamura ◽  
H. Myoga ◽  
Y. Magara ◽  
E. Guibal
Keyword(s):  
Drinking Water ◽  
Membrane Bioreactor ◽  
Suspended Solids ◽  
Nitrate Removal ◽  
Process Efficiency ◽  
Permeation Flux ◽  
Solids Concentration ◽  
Drinking Waters ◽  
Denitrification Activity ◽  
Optimal Ph

Drinking water denitrification was studied on a membrane bioreactor pilot plant. The nitrate removal yields remained constant at 99 %. The specific denitrification activities averaged 0.16 kg N-NO3.kg−1MLSS.d−1 at 20°C and pH 8. The permeation flux was about 0.5 m3.m−2.d−1 throughout the study and did not vary with an increase in the suspended solids concentration. The dependence of the process efficiency on temperature and pH was put into equation. The specific denitrification activity decreased by a factor 1.9 with a temperature decrease of 10°C. The optimal pH was found to be 8 – 8.5. The ethanol consumption was 1.4 g C.g−1N-NO3. The membrane bioreactor technique seems to be a promising answer for the nitrate problem of drinking waters.

Nitrate removal in a closed marine system through the ion exchange membrane bioreactor

2009 ◽  
Vol 166 (1) ◽  
pp. 428-434 ◽  
Author(s):  
Cristina T. Matos ◽  
Ana M. Sequeira ◽  
Svetlozar Velizarov ◽  
João G. Crespo ◽  
Maria A.M. Reis
Keyword(s):  
Ion Exchange ◽  
Membrane Bioreactor ◽  
Nitrate Removal ◽  
Ion Exchange Membrane ◽  
Marine System ◽  
Exchange Membrane

Membrane Bioreactor in China: A Critical Review

2015 ◽  
Vol 2 (2) ◽  
pp. 29-47 ◽  
Author(s):  
Kaisong Zhang ◽  
◽  
Olusegun Abass ◽  
Xing Wu ◽  
Youzhi Guo
Keyword(s):  
Critical Review ◽  
Membrane Bioreactor

EQUILIBRIUM AND KINETICS STUDY OF NITRATE REMOVAL FROM WATER BY PUROLITE A520-E RESIN

2012 ◽  
Vol 11 (1) ◽  
pp. 37-45 ◽  
Author(s):  
Liliana Lazar ◽  
Laura Bulgariu ◽  
Anca Ceica ◽  
Igor Cretescu ◽  
Ion Balasanian
Keyword(s):  
Nitrate Removal ◽  
Kinetics Study ◽  
Equilibrium And Kinetics
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