酵母菌的磁性载体固定化及处理精炼大豆油废水

采用发酵性丝孢酵母菌处理精炼大豆油废水，首先利用海藻酸钠和所制备的Fe₃O₄磁性载体分别对酵母菌进行固定化，然后分别用酵母菌、磁性载体、海藻酸钠固定化酵母菌和磁性载体固定化酵母菌来处理精炼大豆油废水。对处理结果进行对比分析，结果显示：4种物质中，磁性载体固定化酵母菌对精炼大豆油废水处理36 h时效果最佳。pH值6.0比较适合磁性载体固定化酵母菌的生长，处理36 h的废水中的酵母菌的OD₆₀₀值为19.78。通过研究不同pH值和不同接种量条件对磁性载体固定化酵母菌处理精炼大豆油废水的情况，得到处理废水的较优条件：废水pH值6.0,酵母菌接种量10%,处理时间36 h,此条件下废水的化学需氧量(COD)值为2 430 mg/L。

Magnetic Carrier Immobilization of Yeast and Treatment of Refined Soybean Oil Wastewater

This study focused on the treatment of refined soybean oil wastewater by Trichosporon fermentans. Firstly, the yeast was immobilized with sodium alginate and the prepared magnetic carrier, respectively. Then, the yeast, magnetic carrier, sodium alginate-immobilized yeast, and magnetic carrier-immobilized yeast were used to treat refined soybean oil wastewater, respectively. The comparative analysis of the treatment results showed that the magnetic carrier immobilized yeast treatment of refined soybean oil wastewater at 36 h was the best among the four substances. The pH value of 6.0 was more suitable for the growth of immobilized yeast on magnetic carrier. The OD₆₀₀ value of yeast in wastewater treated after 36 h was 19.78. By studying the treatment of refined soybean oil wastewater by magnetic carrier specified yeast under different pH values and inoculation conditions, the optimal conditions for wastewater treatment were pH value 6.0, inoculation amount 10% and culture time 36 h. Under these conditions, chemical oxygen demand value was 2 430 mg/L.