利用啤酒废水制备生物絮凝剂的研究

目的]确定生物絮凝剂产生菌的最优培养条件。方法]以啤酒废水为培养基,研究了CODCr浓度、辅助氮源、无机盐、pH值及培养时间等培养条件对F-12絮凝活性的影响。结果]CODCr浓度为10000mg/L时,F-12的絮凝率最高,为80.04%。以（NH4）2SO4、NaNO3为氮源生产的F-12的絮凝率高于83.00%;以（NH4）2SO4为氮源生产的F-12的絮凝率最高,为84.51%。（NH4）2SO4的加入量为0.2g/L时,F-12的絮凝率最高,为88.21%。KH2PO4可将F-12的絮凝率提高到91.06%;Na＋、Ca2＋、Mg2＋、Fe2＋对其絮凝活性有一定的抑制作用。当培养基初始pH值为6.0～9.0时,F-12的絮凝率高于88.00%;当pH值为7.0时,其絮凝率最高,为94.02%。F-12的絮凝活性在第2天达最大值,为96.24%。结论]F-12的最优产生条件为：1LCODCr浓度10000mg/L的啤酒废水中加入0.2g（NH）SO、0.2gKHPO,培养基初始pH值为7.0,30℃和150r/min条件下摇床培养48h。

Study on Producing Bio-flocculant by Using Brewery Wastewater

Objective] The study aimed to confirm the optimum culture conditions for producing bacteria of bio-flocculant.Method] With brewery wastewater as medium,the influences of culture conditions,such as CODCr concn.,assistant nitrogen source,inorganic salt,pH and culture time,on the flocculating activity of F-12 were studied.Result] When CODCr concn.was 10 000 mg/L,the flocculating rate of F-12 was highest,being 80.04%.The flocculating rates of F-12 produced with (NH4)2SO4 and NaNO3 as nitrogen sources were hi...