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. 2014 Dec 11;12:140. doi: 10.1186/s40201-014-0140-4

Figure 1.

Figure 1

Schematic of the biofiltration set up. 1. Air pressure regulator, 2. Air rotameters, 3. Water bath and bubbler, 4. Humidifier, 5. Biofilter bed, 6. Bed sampling port, 7. CO2, temperature and pressure drop measurement port, 8. Gas sampling port for xylene measurement, 9. peristaltic pump, and 10. Nutrient solution container.