固定化假单胞菌降解油烟废气的研究

Study on degradation of oil fume with immobilized Pseudomonas sp.

将从受油烟废气污染严重的土壤中分离筛选的具有较强降解油烟能力的假单胞菌利用活性炭为填料吸附固定后制成填料床生物反应器。实验考察了进气浓度、气体流量、气体停留时间、容积负荷等对油烟去除率的影响,初步研究了生物反应器的抗冲击能力。结果表明,活性炭填料对菌体具有良好的吸附能力,当油烟进气浓度小于100 mg/L,气体流速小于8 L/h,停留时间大于30 s,容积负荷为2.6-18.9 g油烟废气/（m^3·h）,生物反应器的降解效率可达到95%以上,且活性炭填料床反应器具有较强的抗冲击能力。

Granular activated carbon （GAC） was selected as support material and immobilized with Pseudomonas sp. which has powerful degradating capacity of oil fume isolated and screened from seriously contaminated soil to a packed bioreactor. Experiments on the effect of inlet concentration of oil fume, gas flow rate, retention time and loading rate of oil fume to removal efficiency were carried out ; the ability of GAC bioreactor to buffer shock loading was also investigated. The results showed that GAC matrix provided high bacteria adsorption capacity. When the influent concentration was less than 100 mg/L and gas flow rate of oil fume was less than 8 L/h and retention time was greater than 30 s and loading rate was 2.6 - 18.9 g oil fume/（ m^3 · h） respectively, the removal efficiency of oil fume was above 95 %. The response of bioreactor on shock loading operation showed that GAC bioreactor has gotten a good buffering capacity to withstand fluctuating loading conditions.