【摘要】 以从农药厂土壤中分离得到的苯酚降解菌为菌种,采用有效容积为6L的自制生物反应器对模拟含酚废水进行生物降解实验,考察在不同曝气量、pH值和苯酚浓度下苯酚降解菌降解苯酚性能的变化。结果表明,在温度为17℃、接种量为7%、曝气量为30L/h、pH值为6～8的条件下,24h内可使浓度为700mg/L的苯酚降解率达到99%以上。在苯酚浓度为200～700mg/L范围内其平均降酚速率随苯酚浓度的增加而增大,最大达29.2mg/(L·h)。该菌对pH值、初始苯酚浓度的变化不敏感,能适应一定的冲击负荷。更多还原

【Abstract】 Phenol-degradation bacteria were isolated from the soil of an agrochemical factory,their biodegradation ability for simulative phenolic wastewater was investigated in a 6 L bioreactor.The degradation of phenol with a concentration of 700 mg/L was up to 99% with a bacteria dosage of 7% and an aeration rate of 30 L/h at 17 ℃ and pH 6—8 within 24h.In the phnol concentration range between 200 — 700 mg/L,the average degradation rate increases with increasing the phenol concentration with a maximum of 29.2 mg/(L·h).The bacteria studied here are not sensitive to the variation in pH and the initial phenol concentration,and can adapt to a certain degree of impact load.更多还原