木屑固定除油菌处理含油废水的研究

利用木屑作为载体的固定化微生物QK-1对含油废水进行处理,原油去除率大大高于单纯投加菌液或菌液和木屑的混合物。原油浓度为10.0~30.0g·L^-1时,固定化除油菌QK-1的原油去除率为75.5~94.3%,最佳投加量为干重15.0g·L^-1。研究表明,除油菌的固定化培养基对其原油去除率起了决定性的影响,其中碳源和氮源对其影响较大,pH则不太明显。固定化培养基的优化方案为:蔗糖10.0g·L^-1,牛肉膏6.0g·L^-1,酵母粉1.5g·L^-1,pH8.0。

Study on oil-containing wastewater treatment using microorganisms immobilized by wood crumbs

Microorganism QK-1 was immobilized on wood crumbs and the effect of crude oil removal from aqueous solution by the immobilized QK-1 was tested. The removal rate of the crude oil by the immobilized QK-1 was higher than that by only QK-1 or the mixture of QK-1 and wood crumbs. The removal rate was 75.5~94.3% when the crude oil concentration was 10.0~30.0 g·L^-1, and the optimum strain dosage was 15.0 g·L^-1(dry weight). The results indicated that the culture medium was a crucial factor in oil removal, especially carbon and nitrogen contents. The optimum composition of immobilized culture medium was as follows:sucrose, 10.0 g·L^-1; barmene, 6.0 g·L^-1; yeast extract, 1.5 g·L^-1; pH 8.0.