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

 

ABSTRACT

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.