Abstract:

A strain named JQ-1，which was good at removing formaldehyde，was screened from the collected activated sludge. The strain was preliminary identified as Pseudomonas sp. according to its morphology. The strain JQ-1 was inoculated on the packing in the bio-trickling filter，and then  system for biological treatment of waste gas containing formaldehyde by using a bio-trickling filter was established. After the system was stably，the experiment of using a bio-trickling filter to treat waste gas containing formaldehyde at low concentrations was performed. The experimental results showed that the removal efficiency of formaldehyde was up to over 93% when inlet formaldehyde concentration was less than 33 mg/m³. If it was over 33 mg/m³，the removal efficiency decreased significantly. As the inlet gas flow was continuously increasing，the removal efficiency was gradually declined. The removal efficiency dropped from 92.5% to 73.4% accompanied with the inlet gas flow increasing from 0.06 m³/h to 0.18 m³/h. The spray liquid flow was also an important factor to affect the removal efficiency of formaldehyde. When the spray liquid flow reached 1.8 L/h，the removal efficiency was the best and up to 92.7%. Based on the experimental data，the related basic theory was discussed.

摘要：

从采集活性污泥中筛选得到1株具有高效降解甲醛能力的菌株并命名为JQ-1，根据其形态特征，初步判断菌株JQ-1属假单胞菌属。采用菌株JQ-1对生物膜填料塔内填料进行生物挂膜，组成甲醛废气生物处理系统，在系统稳定后进行了生物膜填料塔净化处理低浓度甲醛废气的初步实验研究。实验结果表明：入口甲醛浓度<33 mg/m³时，甲醛净化效率维持在93%以上，当超过此值时，净化效率有较大幅度下降；随着进气流量的增加，甲醛净化效率是下降的，当进气流量从0.06 m³/h增加到0.18 m³/h时，甲醛净化效率则从92.5%下降至73.4%；喷淋流量对甲醛净化效率也有影响，当喷淋流量为1.8 L/h时，甲醛净化效率最好，可达92.7%。结合实验数据，对相关的基础理论进行了初步探讨。