SDS提高生物滴滤床净化氯苯废气的研究

以ACOF和陶粒作为生物滤床的填料,利用P.putida净化气相中的氯苯,并将十二烷基磺酸钠（SDS）添加于生物滴滤床的喷淋液中,研究其对滤床处理氯苯废气效果的影响.微生物静态培养结果表明,当培养基中SDS浓度大于35 mg/L时,对P.putida存在明显抑制作用.在喷淋液中添加25 mg/L的SDS,有助于缩短滤床的适应期,并提高稳态下滤床的性能.对于填料为ACOF的情况,喷淋液中的SDS最优添加浓度为25 mg/L,此时滤床的最大去除负荷为234.7 g/(m³·h).喷淋液中的SDS经过5 d的运行,会有18%～20%的损失,但对滤床的性能没有明显影响.

Biotreatment of Chrolobenzene-Contained Waste Gas in Trickling Biofilters Enhanced by SDS

Biofitlers inoculated P. putida strain and packed respectively with ACOF and ceramic pellets were employed to purify the chlorobenzene contained gases. An anionic surfactant, sodium dodecyl sulfonate (SDS) was introduced to trickling liquid to investigate its effect on the performance of biofilters. The result of microorganism cultivation shows that the inhibition to P. putida will be occurred when the SDS concentration in culture medium exceeded 35 mg/L. Addition of SDS in trickling liquid at concentration of 25 mg/L reduce the acclimatization periods and improve the performance of biofilter at stable condition. For the ACOF biofilter, the optimum SDS addition concentration is 25 mg/L, and the maximum elimination capacity of 234.7 g/(m3 x h) could be achieved. 18% - 20% of SDS in trickling liquid was lost after five days operation, but the lose could not reduce the efficiency of biofilter evidently.