Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Simultaneous Bioreduction of Multiple Oxidized Contaminants Using a Membrane Biofilm Reactor
This study tests a hydrogen‐based membrane biofilm reactor (MBfR) to investigate simultaneous bioreduction of selected oxidized contaminants, including nitrate (‐N), sulfate (), bromate (), chromate (Cr(VI)) and para‐chloronitrobenzene (p‐CNB). The experiments demonstrate that MBfR can achieve high performance for contaminants bioreduction to harmless or immobile forms in 240 days, with a maximum reduction fluxes of 0.901 g ‐N/m2·d, 1.573 g /m2·d, 0.009 g /m2·d, 0.022 g Cr(VI)/m2·d, and 0.043 g p‐CNB/m2·d. Increasing H2 pressure and decreasing influent surface loading enhanced removal efficiency of the reactor. Flux analysis indicates that nitrate and sulfate reductions competed more strongly than , Cr(VI) and p‐CNB reduction. The average H2 utilization rate, H2 flux, and H2 utilization efficiency of the reactor were 0.026 to 0.052 mg H2/cm3·d, 0.024 to 0.046 mg H2/cm2·d, and 97.5% to 99.3% (nearly 100%). Results show the hydrogen‐based MBfR may be suitable for removing multiple oxidized contaminants in drinking water or groundwater.
Simultaneous Bioreduction of Multiple Oxidized Contaminants Using a Membrane Biofilm Reactor
This study tests a hydrogen‐based membrane biofilm reactor (MBfR) to investigate simultaneous bioreduction of selected oxidized contaminants, including nitrate (‐N), sulfate (), bromate (), chromate (Cr(VI)) and para‐chloronitrobenzene (p‐CNB). The experiments demonstrate that MBfR can achieve high performance for contaminants bioreduction to harmless or immobile forms in 240 days, with a maximum reduction fluxes of 0.901 g ‐N/m2·d, 1.573 g /m2·d, 0.009 g /m2·d, 0.022 g Cr(VI)/m2·d, and 0.043 g p‐CNB/m2·d. Increasing H2 pressure and decreasing influent surface loading enhanced removal efficiency of the reactor. Flux analysis indicates that nitrate and sulfate reductions competed more strongly than , Cr(VI) and p‐CNB reduction. The average H2 utilization rate, H2 flux, and H2 utilization efficiency of the reactor were 0.026 to 0.052 mg H2/cm3·d, 0.024 to 0.046 mg H2/cm2·d, and 97.5% to 99.3% (nearly 100%). Results show the hydrogen‐based MBfR may be suitable for removing multiple oxidized contaminants in drinking water or groundwater.
Simultaneous Bioreduction of Multiple Oxidized Contaminants Using a Membrane Biofilm Reactor
Li, Haixiang (Autor:in) / Lin, Hua (Autor:in) / Xu, Xiaoyin (Autor:in) / Jiang, Minmin (Autor:in) / Chang, Chein‐Chi (Autor:in) / Xia, Siqing (Autor:in)
Water Environment Research ; 89 ; 178-185
01.02.2017
8 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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