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Technical Papers

Removal of nitric oxide in a biotrickling filter under thermophilic condition using Chelatococcus daeguensis

, , , &
Pages 509-516 | Published online: 24 Apr 2012

Figures & data

Figure 1. Schematic of the biotrickling filter system.

Figure 1. Schematic of the biotrickling filter system.

Table 1. Taxonomical characteristics of the thermophilic aerobic denitrifying TAD1

Figure 2. TEM micrographs of strain TAD1 grown on DM agar medium plates after 3 days of incubation.

Figure 2. TEM micrographs of strain TAD1 grown on DM agar medium plates after 3 days of incubation.

Figure 3. Phylogenetic tree based on a comparison of the 16 S rRNA gene sequence. The phylogenetic tree was generated using the neighbor-joining method. Bootstrap values, expressed as percentages of 1000 replications, are given at branching points. Bar shows 10 nucleotides substitutions per 1000 nucleotides.

Figure 3. Phylogenetic tree based on a comparison of the 16 S rRNA gene sequence. The phylogenetic tree was generated using the neighbor-joining method. Bootstrap values, expressed as percentages of 1000 replications, are given at branching points. Bar shows 10 nucleotides substitutions per 1000 nucleotides.

Figure 4. Changes in cell density and nitrate plus nitrite concentration of C. daeguensis TAD1 in batch culture at 50 °C. Symbols: Δ, NO3 -N concentration; ○, NO2 -N concentration; □, optical density of bacteria.

Figure 4. Changes in cell density and nitrate plus nitrite concentration of C. daeguensis TAD1 in batch culture at 50 °C. Symbols: Δ, NO3 −-N concentration; ○, NO2 −-N concentration; □, optical density of bacteria.

Figure 5. NO removal efficiency and plate counts of biofilm samples (Bs) during startup of BTF. ▪, plate counts of biofilm samples (Bs); □, NO removal efficiency.

Figure 5. NO removal efficiency and plate counts of biofilm samples (Bs) during startup of BTF. ▪, plate counts of biofilm samples (Bs); □, NO removal efficiency.

Figure 6. SEM micrographs of microorganisms grown on the porous ceramic particles surfaces after 35 days of NO treatment.

Figure 6. SEM micrographs of microorganisms grown on the porous ceramic particles surfaces after 35 days of NO treatment.

Figure 7. The total performance of the biotrickling filter for NO removal with different NO loading (T = 50 °C, O2 concentration was around 8%, inlet gas was 1 L min−1, the trickling rate was 200 mL min−1, EBRT was 115 sec). ○, inlet gas concentration; •, outlet gas concentration; ▪, NO removal efficiency.

Figure 7. The total performance of the biotrickling filter for NO removal with different NO loading (T = 50 °C, O2 concentration was around 8%, inlet gas was 1 L min−1, the trickling rate was 200 mL min−1, EBRT was 115 sec). ○, inlet gas concentration; •, outlet gas concentration; ▪, NO removal efficiency.

Figure 8. Effect of O2 concentration on NO removal efficiency in 535.7 mg m−3 NO at EBRT 115 sec.

Figure 8. Effect of O2 concentration on NO removal efficiency in 535.7 mg m−3 NO at EBRT 115 sec.

Table 2. Dry and wet experimental removal of NO compared with gas-phase dry removal estimated by the rate expression in eq 4 for a 535.7 mg m−3 initial NO concentration and varying temperature at 8% O2

Figure 9. Reacclimation of biotrickling filter after 2, 4, and 8 days of starvation.

Figure 9. Reacclimation of biotrickling filter after 2, 4, and 8 days of starvation.

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