Cai Zhangli, Kim Daekeun, Sorial George A
Department of Civil and Environmental Engineering, University of Cincinnati, Cincinnati, OH 45221-0071, USA.
J Hazard Mater. 2004 Oct 18;114(1-3):153-8. doi: 10.1016/j.jhazmat.2004.08.012.
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.
运行了一个实验室规模的滴流床空气生物滤池（TBAB），以评估从废气中去除甲乙酮（MEK）的效果。研究了三种生物质控制策略，即反冲洗和两个非使用期（饥饿和停滞）。采用了从0.70至7.04 kg COD/m³·天的五种体积负荷率。每周进行一次反冲洗可去除过量的生物质，并在体积负荷率低于5.63 kg COD/m³·天时获得超过99%的长期稳定去除效率。两个非使用期也能维持99%的去除效率，并且可用作体积负荷率高达3.52 kg COD/m³·天时生物质控制的另一种方法。当体积负荷率不超过3.52 kg COD/m³·天时，非使用期不会延迟恢复。伪一级去除速率常数随体积负荷率的增加而降低。随着负荷率的增加，非使用期对去除率的影响呈现出明显的从正向负的转变。
