作　　者： ; ; ; ; ;

机构地区： 湖南大学环境科学与工程学院

出　　处： 《工业用水与废水》 2008年第4期27-31,共5页

摘　　要： 利用植物载体丝瓜瓤对黄孢原毛平革菌进行固定,研究了固定化细胞对2,4-二氯酚的降解性能。利用固定化细胞流化床反应器连续处理质量浓度为20mg/L的2,4-二氯酚废水。考察了不同水力停留时间对处理效果的影响。结果表明,采用吸附生长法能有效实现黄孢原毛平革菌的固定,固定细胞量可达0.791g[细胞]/[丝瓜瓤]。固定化细胞最适降解温度和pH值分别为35℃、6.0。对于质量浓度在20mg/L以下的低浓度2,4-二氯酚,固定化细胞和游离细胞的降解速率相当;对于质量浓度在50～120mg/L的高浓度2,4-二氯酚,固定化细胞具有明显优势,不仅可以耐受更高浓度的2,4-二氯酚,其降解速率也高于游离细胞,最大降解速率是13.95mg/(L·d),是游离细胞的2倍。不同的水力停留时间对固定化细胞流化床反应器连续处理2,4-二氯酚的降解效率有很大影响,固定化细胞对2,4-二氯酚降解过程遵循Monod方程。 Phanerochaete chrysosporium was immobilized on luffa cylindrical sponge and the biodegradation performance of immobilized cells on 2,4-DCP was studied. Using immobilized cells fluidized bed reactor to continuously treat 2,4-DCP wastewater whose mass concentration was 20 mg/L, the influence of HRT on the treatment effect was investigated. The results showed that, the immobilization ofPhanerochaete chrysosporium could be realized through the adsorption growth, the immobilized cells amount reached 0.791 g [cells ]/g [luffa cylindrical sponge]. The optimal temperature and pH for cells immobilization were 35 ℃ and 6.0 respectively. For the 2,4-DCP wastewater whose mass concentration was blow 20 mg/L, the biodegradation rate by the immobilized cells was equal to that by the free cells; however, for the said kind of wastewater whose mass concentration was 50 - 120 mg/L, immobilized cells showed prominent advantages, for they could bear higher concentration 2,4-DCP and obtained better biodegradation rate, the highest biodegradation rate reached 13.95 mg/（L, d）, which was twice as that by the free cells. HRT had a great influence on the biodegradation rate of 2,4-DCP continuously treated by immobilized cells fluidized bed reactor and the process of immobilized cells biodegrading 2,4-DCP was found to follow the Monod equation.

关 键 词： 固定化 丝瓜瓤 黄孢原毛平革菌 二氯酚

领　　域： [环境科学与工程]