Abstract
A lab-scale trickle-bed air biofilter (TBAB) was operated to evaluate the removal of methyl ethyl ketone (MEK) from waste gas. Three biomass control strategies were investigated, namely, backwashing and two non-use periods (starvation and stagnant). Five volumetric loading rates from 0.70 to 7.04 kg COD/m 3 day were employed. Backwashing once a week removed the excess biomass and obtained long-term, stable performance over 99% removal efficiency for loading rates less than 5.63 kg COD/m 3 day. The two non-use periods could also sustain 99% removal efficiency and could be employed as another means of biomass control for loading rates up to 3.52 kg COD/m 3 day. The non-use periods did not delay the recovery when the loading rate did not exceed 3.52 kg COD/m 3 day. The pseudo-first-order removal rate constant decreased with increase in volumetric loading rate. The effect of non-use periods on removal rate showed apparent transition from positive to negative with the increase in loading rate.
| Original language | English |
|---|---|
| Pages (from-to) | 153-158 |
| Number of pages | 6 |
| Journal | Journal of Hazardous Materials |
| Volume | 114 |
| Issue number | 1-3 |
| DOIs | |
| State | Published - 18 Oct 2004 |
Keywords
- Backwashing
- MEK
- Non-use periods
- Removal rate
- TBAB