Pan Wei-Long, Yu Jian-Ming, Cheng Zhuo-Wei, Cai Wen-Ji
Huan Jing Ke Xue. 2013 Dec;34(12):4675-83.
A biofilter (BF) packed with nutrition slow-release material and a biotrickling filter (BTF) packed with ether-based polyurethane foam were set up to remove dichloromethane (DCM) from exhaust gas. Results showed that the biofilm formations in BTF and BF were completed by using the mixture of a special strain and a bacterial community, within 25d and 22d, respectively. Through the observation of the filter surface by SEM, the surface of packings in BF was loose with thin biofilm colonies, whereas the one in BTF was dense with thick biofilm. Under the condition of inlet DCM concentration of 100-1,500 mg x m(-3), EBRT of 25-85 s, the removal efficiency of DCM in BTF was better than that in BF, and the maximum removal load was 22.61 g x (m3 x h)(-1) and 29.05 g (m3 x h)(-1), respectively. The relationship between CO2 production and DCM removal was approximately linear, with the mineralization rate being 70.4% and 66.8% for BTF and BF, respectively. The dynamic behaviors of DCM in BTF and BF were described by the Michaelis-Menten model. Through the calculation, the unit volume maximum degradation rate r(max) was 22.7790 g x (m3 x h)(-1) and 28.5714 g x (m3 x h)(-1), while the gas phase saturation constant Ks was 0.1412 g x m(-3) and 0.1486 g x m(-3)
搭建了填充营养缓释材料的生物滤池（BF）和填充醚基聚氨酯泡沫的生物滴滤池（BTF），用于去除废气中的二氯甲烷（DCM）。结果表明，分别采用特殊菌株与细菌群落的混合物，BTF和BF中的生物膜形成在25天和22天内完成。通过扫描电子显微镜观察滤池表面，BF中填料表面疏松，生物膜菌落较薄，而BTF中填料表面致密，生物膜较厚。在进气DCM浓度为100 - 1500 mg·m⁻³、空床停留时间为25 - 85 s的条件下，BTF中DCM的去除效率优于BF，最大去除负荷分别为22.61 g·(m³·h)⁻¹和29.05 g·(m³·h)⁻¹。CO₂产生量与DCM去除之间的关系近似呈线性，BTF和BF的矿化率分别为70.4%和66.8%。用米氏模型描述了BTF和BF中DCM的动力学行为。经计算，单位体积最大降解速率r(max)分别为22.7790 g·(m³·h)⁻¹和28.5714 g·(m³·h)⁻¹，气相饱和常数Ks分别为0.1412 g·m⁻³和0.1486 g·m⁻³
