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.

Hydrogen-based, hollow-fiber membrane biofilm reactor for reduction of perchlorate and other oxidized contaminants

2004 ◽  
Vol 49 (11-12) ◽  
pp. 223-230 ◽  
Author(s):  
R. Nerenberg ◽  
B.E. Rittmann
Keyword(s):  
Drinking Water ◽  
Electron Donor ◽  
Hollow Fiber ◽  
Hollow Fiber Membrane ◽  
Chlorinated Solvents ◽  
Drinking Water Treatment ◽  
Primary Electron ◽  
Biofilm Reactor ◽  
Fiber Membrane ◽  
Membrane Biofilm Reactor

Many oxidized pollutants, such as nitrate, perchlorate, bromate, and chlorinated solvents, can be microbially reduced to less toxic or less soluble forms. For drinking water treatment, an electron donor must be added. Hydrogen is an ideal electron donor, as it is non-toxic, inexpensive, and sparsely soluble. We tested a hydrogen-based, hollow-fiber membrane biofilm reactor (MBfR) for reduction of perchlorate, bromate, chlorate, chlorite, chromate, selenate, selenite, and dichloromethane. The influent included 5 mg/L nitrate or 8 mg/L oxygen as a primary electron accepting substrate, plus 1 mg/L of the contaminant. The mixed-culture reactor was operated at a pH of 7 and with a 25 minute hydraulic detention time. High recirculation rates provided completely mixed conditions. The objective was to screen for the reduction of each contaminant. The tests were short-term, without allowing time for the reactor to adapt to the contaminants. Nitrate and oxygen were reduced by over 99 percent for all tests. Removals for the contaminants ranged from a minimum of 29% for chlorate to over 95% for bromate. Results show that the tested contaminants can be removed as secondary substrates in an MBfR, and that the MBfR may be suitable for treating these and other oxidized contaminants in drinking water.

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.

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
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