Degradation of Polyvinyl Alcohol by a Mixed Culture Isolated from Paper Mill Treatment

Year 2014, Volume: 27 Issue: 2, 839 - 845, 27.06.2014

Demet Çetin , Sumru Çıtak

Abstract

Mixed microbial culture from paper mill treatment system was enriched on polyvinyl alcohol (PVA) medium and its PVA biodegradation capacity was investigated as a function of change in the initial pH values and PVA concentrations. The optimum pH value at 0.75 g l^-1 initial PVA concentration was determined to be 8. PVA biodegradation by mixed microbial culture was investigated at the range of 0.68 – 15.5 g l^-1 initial PVA concentrations. The mixed microbial culture was found to degrade within 5 days 98.6–88.5% of the initial PVA levels which ranged from 0.68 to 1.14 g l⁻¹. The mixed microbial culture was found to remove more than 90% of the initial PVA concentrations, within the range of 3.13 to 6.64 g l^{-1 in 16–25 days of incubation at 35} °C. 

Keywords

polyvinyl alcohol, PVA, mixed culture, biodegradation

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