Journal of Pure and Applied MicrobiologyVol. 9 No. 1

Treatment of Oil-containing Wastewater by Immobilized Yeast Cells

Li Ling1, Ying Liu2* and Yiming Su1

1College of Science & Technology, Ningbo University, Ningbo 325211, China. 2Faculty of Architectural Civil Engineering and Environment, Ningbo University, Ningbo 325211, China.

Received on 18 November 2014 and accepted on 09 January 2014



The oil-containing wastewater was treated by the immobilized yeast cells(pellets) and the effects of factors on immobilizations were studied . The pellets were prepared with polyvinylalcohol(PVA)-sodium alginate(SA).The experimental results indicate that the optimized concentration of PVA and SAwas 7% (w/v)and 1.3%(w/v), respectively. Furthermore, the process of preparing pellets was also investigated,and the optimized procedurewas that the pellets were initially treated by CaCl2 solution with concentration of 2% for 6h, then immersed by the saturated solution of boric acid for another 18h. According to the above-mentioned method, pellets have high mechanical strength and mass transfer performance , and the final cell activity is about 80% .

Keywords : Yeast; PVA; SA; immobilization; COD removal.