高压对复合型微生物絮凝剂产生菌的性质和絮凝活性的影响

考察了复合型微生物絮凝剂产生菌在40～160 MPa高压处理前后的形态、 生理生化性质及代谢产物的絮凝活性变化. 结果表明， 高压对复合菌的形态有明显的影响， 对菌的生理生化性质影响较小. 絮凝活性实验表明， 高压作用下， 2号组成菌代谢产物的絮凝活性有明显的压力阈值， 在70 MPa时， 其絮凝率为60.9％， 而复合菌代谢产物的絮凝活性无明显变化， 几种压力下絮凝率皆在95％以上.

Effects of the High Pressures on the Characters and Flocculating Activity of Bioflocculant-producing Compound Bacterium

Before and after the treatment of high pressures ranged from 40~160 MPa,the physiological and biochemical characters and the flocculating activity of the metabolites of(bioflocculant-)producing compound bacterium were investigated.The results suggest that high pressures partly impacted the physiological and(biochemical) characters but had significant effects on the morphology.Furthermore the flocculating activity of bacterium No.2 had an obvious threshold of pressure,its ratio of flocculation was 60.9% at 70 MPa,but that of bioflocculant-producing compound bacterium changed little.The ratios of flocculation were all above 95% under various pressures.