Biotechnology Bulletin ›› 2016, Vol. 32 ›› Issue (2): 146-151.doi: 10.13560/j.cnki.biotech.bull.1985.2016.02.019

• Research report • Previous Articles     Next Articles

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

CHEN Liang, WANG Li   

  1. (College of Environment and Energy Engineering,Anhui University of Architecture,Hefei 230601)
  • Received:2015-04-09 Online:2016-02-24 Published:2016-02-25

Abstract: The strain Paracoccus sp.L-4 was isolated from Paracoccussp.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 pH6.0-7.0, respectively.And Zn2+, Co2+, Cu2+, Ag+, Al3+, Fe3+ andFe2+ 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 mL, the ratio of decolorization decreased with the increase of volume of liquid.However, when the amount of liquid was ≥ 125 mL, the degradationrate of methyl red was still over 40% at 12 h, indicating that strain L-4 hasa potential application value inbiological treatmentof dye wastewater.

Key words: methyl red, Paracoccus sp.L-4, isolation, identification, degradation characteristics