Kinetic modelling for removal of m-cresol from wastewater using mixed microbial culture in batch reactor

Journal of Water Reuse and Desalination

Dey, Sudipta¹  Mukherjee, Somnath² 

[1]Department of Biotechnology, Heritage Institute of Technology, Anandapur, Chowbaga Road, Kolkata – 700107, West Bengal, India

[2]Environmental Engineering Division, Civil Engineering Department, Jadavpur University, Raja S. C. Mullic Road, Kolkata – 700032, West Bengal, India

关键词: biodegradation;    kinetic models;    m-cresol;    mixed culture;    substrate inhibition kinetics;   

DOI  :  10.2166/wrd.2012.055

学科分类：工程和技术（综合）

来源: IWA Publishing

【 摘 要 】

An indigenous mixed microbial culture isolated from an effluent treatment section of a coke oven plant has been studied for its m-cresol biodegradation capacity under aerobic batch reactor operation. The culture, after acclimatization could biodegrade up to 700 mg/L of m-cresol. The m-cresol concentration in the present study was at 50 mg/L and then ranged from 100 to 700 mg/L with step up concentration of 100 mg/L. Both biodegradation kinetics and microorganism growth kinetics were studied and kinetic parameters were estimated. The result showed that m-cresol was an inhibitory-type substrate and the inhibition effect became predominant after 200 mg/L of initial m-cresol. The specific growth rate of microorganisms increased up to 200 mg/L of m-cresol as sole carbon source, and then started decreasing. The kinetic data obtained in this study have been fitted to different substrate inhibition models (Haldane, Han-Levenspiel, Edward, Luong, Aiba, Teissier, Yano-Koga). Among all models, Han-Levenspiel and Luong were best fitted for this study (root mean square error = 0.001349). In addition, the variation of observed yield coefficient Yx/s with initial m-cresol concentration was investigated. The values of kinetic constants estimated by the models proved that the mixed culture used in the study had good potential for m-cresol degradation.

【 授权许可】

CC BY-NC-ND