Feasibility study on the removal of nitrous compounds with a hollow-fiber membrane biofilm reactor

2005 ◽  
Vol 51 (6-7) ◽  
pp. 365-371 ◽  
Author(s):  
J.-H. Shin ◽  
B.-I. Sang ◽  
Y.-C. Chung ◽  
Y.-K. Choung
Keyword(s):  
Nitrogen Removal ◽  
Hollow Fiber ◽  
Hollow Fiber Membrane ◽  
Biofilm Reactor ◽  
Treatment System ◽  
Fiber Membrane ◽  
Removal Rates ◽  
Membrane Biofilm Reactor ◽  
N Removal ◽  
Oligotrophic Water

The objective of this study was to develop an integrated nitrogen treatment system using autotrophic organisms. A treatment system consists of an aerobic hollow-fiber membrane biofilm reactor (HfMBR) and anaerobic HfMBR. In the aerobic HfMBR, a mixture gas of air and O2 was supplied through the fibers for nitrification. Denitrification occurred in the anaerobic HfMBR using H2 as the electron donor. The treatment system was continuously operated for 190 days. NH4-N removal efficiencies ranging from 95% to 97% were achieved at NH4-N concentrations of influent ranging from 50 to 100 mg N/L. When glucose was added to the influent, the simultaneous nitrification and denitrification occurred in the aerobic HfMBR, and nitrogen removal rates were changed according to the COD/NH4-N ratio of influent. In the anaerobic HfMBR, autotrophic denitrification using H2 occurred and the removal rates achieved in this study were 23–58 mg N/m2 d. In this study, the achieved removal efficiency was lower than other study findings; however, the result suggested that this hybrid HfMBR system can be used effectively for nitrogen removal in oligotrophic water.

Study on Membrane Fouling of a Hydrogen-Based Membrane Biofilm Reactor Treating Nitrate-Contaminated Drinking Water

2013 ◽  
Vol 361-363 ◽  
pp. 814-817
Author(s):  
Gang Li ◽  
Jun Yu ◽  
Yan Hao Zhang ◽  
Lei Gao ◽  
Hua Zhang
Keyword(s):  
Drinking Water ◽  
Nitrogen Removal ◽  
Hollow Fiber ◽  
Membrane Fouling ◽  
Hollow Fiber Membrane ◽  
Biofilm Reactor ◽  
Fiber Membrane ◽  
Membrane Biofilm Reactor ◽  
Contaminated Drinking Water ◽  
Total Nitrogen Removal

A hollow fiber membrane biofilm reactor (MBfR) using Polyethylene (PE) membranes was investigated for denitrification in nitrate-contimanitated drinking water. The reactor was operated over 85 days with influent nitrate loading increasing gradually. The result showed that maximum of nitrate denitrification rate achieved was 3.84 g NO3ˉ-N/m3/d (1.36 g NO3ˉ-N/m2/d) and the total nitrogen removal was more than 96%. The results also showed that the membrane pollution was mainly caused by the mineral sedimentation and EPS.

Bioreduction of para-chloronitrobenzene in a hydrogen-based hollow-fiber membrane biofilm reactor: effects of nitrate and sulfate

2013 ◽  
Vol 25 (2) ◽  
pp. 205-215 ◽  
Author(s):  
Haixiang Li ◽  
Zhiqiang Zhang ◽  
Xiaoyin Xu ◽  
Jun Liang ◽  
Siqing Xia
Keyword(s):  
Hollow Fiber ◽  
Hollow Fiber Membrane ◽  
Biofilm Reactor ◽  
Fiber Membrane ◽  
Membrane Biofilm Reactor

The removal of nitrogen using an autotrophic hybrid hollow-fiber membrane biofilm reactor

Desalination ◽  
2005 ◽  
Vol 183 (1-3) ◽  
pp. 447-454 ◽  
Author(s):  
Jeong-Hoon Shin ◽  
Byoung-In Sang ◽  
Yun-Chul Chung ◽  
Youn-kyoo Choung
Keyword(s):  
Hollow Fiber ◽  
Hollow Fiber Membrane ◽  
Biofilm Reactor ◽  
Fiber Membrane ◽  
Membrane Biofilm Reactor

Evidence of specialized bromate-reducing bacteria in a hollow fiber membrane biofilm reactor

2009 ◽  
Vol 59 (10) ◽  
pp. 1969-1974 ◽  
Author(s):  
K. J. Martin ◽  
L. S. Downing ◽  
R. Nerenberg
Keyword(s):  
Hollow Fiber ◽  
Denaturing Gradient Gel Electrophoresis ◽  
Selective Pressure ◽  
Hollow Fiber Membrane ◽  
Primary Electron ◽  
Biofilm Reactor ◽  
Fiber Membrane ◽  
Membrane Biofilm Reactor ◽  
Reducing Bacteria ◽  
Bromate Reduction

Bromate is a carcinogenic disinfection by-product formed from bromide during ozonation or advanced oxidation. We previously observed bromate reduction in a hydrogen-based, denitrifying hollow fiber membrane biofilm reactor (MBfR). In this research, we investigated the potential existence of specialized bromate-reducing bacteria. Using denaturing gradient gel electrophoresis (DGGE), we compared the microbial ecology of two denitrifying MBfRs, one amended with nitrate as the electron acceptor and the other with nitrate plus bromate. The DGGE results showed that bromate exerted a selective pressure for a putative, specialized bromate-reducing bacterium, which developed a strong presence only in the reactor with bromate. To gain further insight into the capabilities of specialized, bromate-reducing bacteria, we explored bromate reduction in a control MBfR without any primary electron acceptors. A grown biofilm in the control MBfR reduced bromate without previous exposure, but the rate of reduction decreased over time, especially after perturbations resulting in biomass loss. The decrease in bromate reduction may have been the result of the toxic effects of bromate. We also used batch tests of the perchlorate-reducing pure culture, Dechloromonas sp. PC1 to test bromate reduction and growth. Bromate was reduced without measurable growth. Based on these results, we speculate bromate's selective pressure for the putative, specialized BRB observed in the DGGE was not growth related, but possibly based on resistance to bromate toxicity.

scholarly journals Actual Application of a H2-Based Polyvinyl Chloride Hollow Fiber Membrane Biofilm Reactor to Remove Nitrate from Groundwater

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Yanhao Zhang ◽  
Lilong Huang ◽  
Zhibin Zhang ◽  
Cuizhen Sun ◽  
Jixiang Li
Keyword(s):  
Dissolved Oxygen ◽  
Sulfate Reduction ◽  
Oxygen Reduction ◽  
Hollow Fiber ◽  
Nitrate Reduction ◽  
Hollow Fiber Membrane ◽  
Biofilm Reactor ◽  
Contaminated Groundwater ◽  
Fiber Membrane ◽  
Membrane Biofilm Reactor

To evaluate the actual performance of the H2-based polyvinyl chloride hollow fiber membrane biofilm reactor (HF-MBfR), we used HF-MBfR to remove nitrate from the nitrate contaminated groundwater with the dissolved oxygen (~6.2 mg/L) in Zhangqiu city (Jinan, China). The reactor was operated over 135 days with the actual nitrate contaminated groundwater. The result showed that maximum of nitrate denitrification rate achieved was over 133.8 gNO3--N/m3d (1.18 gNO3--N/m2d) and the total nitrogen removal was more than 95.0% at the conditions of influent nitrate 50 mg/L, hydrogen pressure 0.05 MPa, and dissolved oxygen (DO) 6.2 mg/L, with the nitrate in effluent under the value limits of drinking water. The fluxes analysis showed that the electron-equivalent fluxes of nitrate, sulfate, and oxygen account for about 81.2%, 15.2%, and 3.6%, respectively, which indicated that nitrate reduction could consume more electrons than that of sulfate reduction and dissolved oxygen reduction. The nitrate reduction was not significantly influenced by sulfate reduction and the dissolved oxygen reduction. Based on the actual groundwater quality on site, the Langelier Saturation Index (LSI) was 0.4, and the membrane could be at the risk of surface scaling.

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