硅藻土对水相中啤酒酵母菌的吸附研究

Biosorbility of Jilin-Changbai Diatomite to Beer Saccharomycete Biomass

通过考察吸附条件对吸附率及吸附负载量的影响,研究了吉林长白硅藻土对水相中啤酒酵母菌的吸附特性·实验结果表明,硅藻土对啤酒酵母菌有较好的吸附效果;硅藻土对啤酒酵母菌的吸附在20min就达到吸附平衡;pH值在7 5时吸附效果最好;在硅藻土用量为20g/L,溶液中啤酒酵母菌质量浓度为40g/L时,硅藻土对其吸附率为64%,硅藻土吸附啤酒酵母菌的吸附负载量为160mg/g·吸附温度对该吸附过程影响不大,室温下操作即可·经测试显示,吉林长白硅藻土粒度小、比表面积大,其优势藻属为小环藻和直链藻,且其表面孔洞通畅,层次分明,分布均匀且排列有序,是一种天然的优质吸附剂·

The biosorption of beer saccharomycete biomass by white diatomite from Changbai Mountain Area in Jilin Province was investigated experimentally. The results showed that such a biosorbent has favorable adsorbing effect on beer saccharomycete biomass, and both the adsorbent and adsorbate come in equilibrium within 20minutes. When the pH value is 7.5 the diatomite shows the best biosorbing effect, and when the amount of diatomite used is 20g/L with the concentration of beer saccharomycete biomass up to 40g/L the biosorbing rate is 64% at which the loading amount of the diatomite is 160mg/g. The biosorption is affected not much by temperature, and it is available to perform biosorption at room temperature. According to the test results, the particles of Jilin-Changbai diatomite is fine with large specific surface area and a bit of impurities. The dominant kinds of algae of the diatomite are small ring and straight chain algae, which provide clear and intercommunicating surface porosity with even pore arrangement. So, the diatomite is naturally a good adsorbent.