表面活性剂对绢纺原料细菌除油的影响

研究了8种常用表面活性剂对细菌X8的生长及对滞头细菌除油效果的影响。结果表明:大部分表面活性剂抑制细菌X8的生长,SDS质量浓度低于0.5 g/L时对细菌X8的生长影响较小。添加0.5 g/L SDS能增强细菌的除油和脂肪酶的产生,只用0.5 g/L SDS除油,残油率为11.36%,能除去17.4%的油脂;只用细菌发酵除油,残油率为7.53%,能除去45.3%的油脂;在细菌发酵中添加0.5 g/L SDS除油,残油率为3.62%,能除去73.7%的油脂;不加SDS的细菌发酵体系脂肪酶活为344 IU/L,添加SDS的细菌发酵体系脂肪酶活为451 IU/L。表明添加适量SDS细菌除油体系通过洗涤作用和促进脂肪酶的产生增强除油效果。

Effect of surfactants on deoiling of waste silk by bacteria

The effect of eight selected surfactants on the growth of bacterium strain X8 and the deoiling effect of strain X8 from frigon was studied. The results showed that most of the selected surfactants inhibited the growth of the strain X8 . When the concentration of SDS was less than 0.5 g/L, it had slight effect on the growth of the strain X8. Addition of 0.5 g/L SDS in deoiling of frigon by the strain X8 enhanced the oilremoving effect and the production of lipase. The residual oil content was 11.36 % when the treatment was performed only by 0.5 g/L SDS and 17.4% oil was removed; the residual oil content was 7.53% when the treatment was carried out only by fermentation and 45.3 % oil was removed; the residual oil content was 3.62 % when the treatment was undertaken by fermentation plus addition of 0.5 g/L SDS and 73.7 % oil was removed. The activity of lipase with and without SDS in the fermentation system was 451 IU/L and 344 IU/L respectively. This indicated that deoiling effect was enhanced by washing and promoting lipase production in the fermentation system with addition of proper amount of SDS.