Table 1. Experimental procedures and conditions of biofiltration.
| Stage No.Ⅰ: acclimatization | |||
|---|---|---|---|
| components | Inlet concentration (g/m3) | Inlet Loading (g/m3h) | Time (day) |
| T+X+S | 0.33 | 40 | 15 |
| Stage No.Ⅱ: treatment of single gas | |||
| toluene | 0.33–6.67 | 40–800 | 10 |
| styrene | 0.33–5.00 | 40–600 | |
| xylene | 0.33–4.17 | 40–500 | |
| benzene | 0.17–3.75 | 20–450 | |
| Stage No. Ⅲ: treatment of binary gas | |||
| T+B | 0.33–6.25 | 40–750 (20+20)-(375+375) | 20 |
| T+S | 0.33–4.17 | 40–500 (20+20)-(250+250) | |
| T+X | 0.33–5.00 | 40–600 (20+20)-(300+300) | |
| S+B | 0.33–3.33 | 40–400 (20+20)-(200+200) | |
| S+T | 0.33–2.08 | 40–250 (20+20)-(125+125) | |
| S+X | 0.33–2.5 | 40–300 (20+20)-(150+150) | |
| X+B | 0.33–2.08 | 40–250 (20+20)-(125+125) | |
| X+T | 0.33–1.67 | 40–200 (20+20)-(100+100) | |
| X+S | 0.33–2.08 | 40–250 (20+20)-(125+125) | |
| Stage No. Ⅳ: treatment of tertiary gas | |||
| T+S+X | 0.33–1.5 | 40–180 | 7 |
| Stage No. Ⅴ: treatment of quaternary gas | |||
| T+S+X+B | 0.33–1.17 | 40–140 | 7 |
B: benzene; T: toluene; X: xylene; S: styrene.