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Biological neutralization and biosorption of dyes of alkaline textile industry wastewater

Jain, Rakeshkumar M., Mody, Kalpana H., Keshri, Jitendra, Jha, Bhavanath
Marine pollution bulletin 2014 v.84 no.1-2 pp. 83-89
Enterococcus faecalis, Fourier transform infrared spectroscopy, Madhuca longifolia, bacteria, biosorption, carbon, coasts, dyes, flowers, industrial effluents, neutralization, nitrogen, nuclear magnetic resonance spectroscopy, pH, sugarcane bagasse, textile industry, wastewater, water pollution, India
The present work was aimed to secure biological neutralization and biosorption of dyes of an alkaline textile industrial effluent (ATIE) using an alkaliphilic bacterium, Enterococcus faecalis strain R-16 isolated from Gujarat coast. The isolate was capable and competent to bring down the pH of ATIE from 12.1 to 7.0 within 2h in the presence of carbon and nitrogen sources. Carboxylic group concentration (CGC), NMR and FT-IR analysis revealed production of carboxylic acid as a result of neutralization. The unconventional carbon and nitrogen sources like Madhuca indica flowers or sugar cane bagasse supported the growth of bacterium with effective neutralization and biosorption of dyes from ATIE. The process proved to be efficient, inexpensive and eco-friendly as compared to conventional chemical neutralization process.