一株新的染料甲基红降解菌株Paracoccus sp.L-4的分离、鉴定及其脱色特性研究

Isolation,Identification and Decolonization Characteristics of a New Methyl Red Degrading Bacterial Strain Paracoccus sp. L-4

从副球菌属首次分离到一株有较强甲基红降解能力的菌株Paracoccus sp.L-4,在LB培养基中,16 h内使100 mg/L培养液甲基红降解掉91.74%,2 d内可使甲基红降解率近达100%。该菌株降解甲基红适宜的温度和p H值范围分别为25-30℃、p H6.0-7.0,Zn2+、Co2+、Cu2+、Ag+、Al3+、Fe3+、Fe2+对甲基红的降解有明显抑制作用。菌株L-4在好氧和缺氧条件均能较好降解甲基红,装液量≤100 m L时脱色率随装液量增加而减少,装液量≥125 m L时,12 h时降解率仍大于40%。菌株L-4在染料废水的生物处理方面有一定的应用价值。

The strain Paracoccus sp. L-4 was isolated from Paracoccus sp. at first time, and it had the strong ability to degrade methyl red. In LB medium, methyl red in the concentration of 100 mg/L was degraded 91.74% in 16 h, and approximately 100% in 2 d. Furthermore, the optimal conditions for degrading methyl red were 25-30℃ and p H6.0-7.0, respectively. And Zn2＋, Co2＋, Cu2＋, Ag＋, Al3＋, Fe3＋ and Fe2＋ had an significant inhibitory effects on the degradation of methyl red. The degradation and decolorization of methyl red by strain L-4 was performed well in both aerobic and anoxic conditions. When the volume of liquid was ≤ 100 m L, the ratio of decolorization decreased with the increase of volume of liquid. However, when the amount of liquid was ≥ 125 m L, the degradation rate of methyl red was still over 40% at 12 h, indicating that strain L-4 has a potential application value in biological treatment of dye wastewater.