SciELO - Scientific Electronic Library Online

 
vol.37 issue1Application of phycoremediation technology in the treatment of wastewater from a leather-processing chemical manufacturing facilityApplication of the mixture design to decolourise effluent textile wastewater using continuous stirred bed reactor author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Article

Indicators

Related links

  • On index processCited by Google
  • On index processSimilars in Google

Share


Water SA

On-line version ISSN 1816-7950
Print version ISSN 0378-4738

Abstract

YAO, Haiyan; REN, Yuan; WEI, Chaohai  and  YUE, Siyang. Biodegradation characterisation and kinetics of m-cresol by Lysinibacillus cresolivorans. Water SA [online]. 2011, vol.37, n.1, pp.15-20. ISSN 1816-7950.

A novel strain of m-cresol-degrading bacterium, named as Lysinibacillus cresolivorans, was isolated from aerobic sludge from a coking wastewater treatment plant. This bacterium is able to utilise m-cresol as its sole source of carbon and energy. The optimal pH for growth is 6.8 ~ 7.3 and the optimal temperature is 35ºC. Compared to organic nitrogen sources, inorganic nitrogen sources were easily utilised for the m-cresol biodegradation. The degradation rate of m-cresol at different starting concentrations was analysed with zero-order kinetic characteristics. When the initial concentration of m-cresol was 224.2 mg·ℓ-1, the reaction rate reached a maximum at 46.80 mg·(ℓ·h)-1.The cell growth kinetics was also investigated with initial m-cresol concentrations varying from 0 to 1 200 mg·ℓ-1. The growth kinetics was well described by the Haldane kinetic models. The parameter values of m-cresol on cell growth were µmax = 0.89 h-1, Ks = 426.25 mg·ℓ-1, Ki = 51.26 mg·ℓ-1. Experiments supplementing growth with glucose indicated that this substrate increased the biomass, and also induced the biodegradation of m-cresol. From the results, it can be concluded that Lysinibacillus cresolivorans is an efficient m-cresoldegrading bacterium and that glucose plays multiple roles in the co-substrate condition.

Keywords : m-cresol; biodegradation; Lysinibacillus cresolivorans; high efficient degrading bacterium.

        · text in English     · English ( pdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License