Application study of high-efficiency bioflocculant D6 in slaughter wastewater
FU Bao-rong1, LIU Dong1, QIAO Yong-min2, CHEN Shi2, XU Cheng-bin1, MA Xi-ping1, HUI Xiu-juan1
1. School of Environmental Science, Liaoning University, Shenyang 110036, China; 2. College of Life Science and Technology, Jinan University, Guangzhou 510632, China
One bioflocculant-producing strain of high flocculating activity was screened for slaughter wastewater.The optimum flocculating conditions of bioflocculant D6 produced from this strain were obtained by single factor test and orthogonal design test.Flocculating conditions included bioflocculant D6 dosage,pH,kinds of metal ions and 1% CaCl2 dosage.The study found bioflocculant D6 had flocculating activity under precondition of Alkaline environment,it indicated full extension of molecular chains of bioflocculant D6 was the determinant for flocculation,so the flocculating mechanism of bioflocculant D6 was adsorption-bridge.The optimum flocculating conditions were as follows:bioflocculant D6 dosage 25 mL·L-1,1%CaCl2 dosage 55 mL·L-1,pH 8.In the optimum flocculating conditions,flocculation rate was 96.6%,turbidity removal rate was 97.8%,SS removal rate was 92.6%.
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