聚氨酯泡沫固定化菌脱色偶氮染料废水的研究

Decolorization of azo dyes by polyurethane foam immobilized bacteria

以水、甲基硅油、二月桂酸二丁基锡、三乙醇胺联合聚酯多元醇等制备的聚氨酯泡沫为微生物固定化载体,考察了异质孔径聚氨酯泡沫载体固定的偶氮染料高效脱色菌对金橙I的脱色性能.实验结果表明,经过一个运行周期,大、小孔径聚氨酯泡沫所构建的微生物固定化系统对金橙I的最优脱色率分别为96.2%和94.8%;向小孔径聚氨酯泡沫固定化系统中添加碳源后,其脱色率最终达到了97.4%.两个系统在运行过程中COD均有不同程度升高,pH均有不同程度降低.该固定化系统在连续式和序批式运行模式下对高浓度金橙I染料的脱色率分别为93.8%和88.9%.

In this study ,polyurethane poam ,a new microbial immobilization carrier ,was pre‐pared with water ,dibutyl tin dilaurate （DBTI） and triethanolamine .The decoloration rate and efficiency to golden orange I by the bacterial stains immobilized on polyurethane foam with different pore sizes was tested .Results showed that ,after a running period ,the decol‐oration rates of mixed azodyes containing wastewater were 96 .2% and 94 .8% with large and small pore size polyurethane foam respectively .When having added carbon source to the mi‐crobial immobilization system with small pore size polyurethane foam ,the decoloration rate was 97 .4% .The COD of two systems both increased while pH decreased .The decoloration rates of high concentration of golden orange I were 93 .8% and 88 .9% with continuous and batch sequencing modes respectively .