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论文类型：期刊论文

发表时间：2009-05-01

发表刊物：WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY

收录刊物：SCIE、EI、Scopus

卷号：25

期号：5

页面范围：875-881

ISSN号：0959-3993

关键字：Nitrobenzene; Aerobic biodegradation; Defined consortium; Polyurethane foam; Immobilization

摘要：An aerobic microbial consortium constructed by the combination of Rhodotorula mucilaginosa Z1, Streptomyces albidoflavus Z2 and Micrococcus luteus Z3 was immobilized in polyurethane foam and its ability to degrade nitrobenzene was investigated. Batch experimental results showed that polyurethane-foam-immobilized cells (PFIC) more efficiently degrade 200-400 mg l(-1) nitrobenzene than freely suspended cells (FSC). Kinetics of nitrobenzene degradation by PFIC was well described by the Andrews equation. Compared with FSC, PFIC exhibited better reusability (over 100 times) and tolerated higher shock-loadings of nitrobenzene (1,000 mg l(-1)). Moreover, In the presence of salinity (a parts per thousand currency sign5% NaCl, w/v), phenol (a parts per thousand currency sign150 mg l(-1)) and aniline (a parts per thousand currency sign50 mg l(-1)), respectively, degradation efficiency of nitrobenzene by PFIC reached over 95%. Even in the presence of both 100 mg l(-1) phenol and 50 mg l(-1) aniline, over 75% nitrobenzene was removed by PFIC in 36 h. Therefore, the immobilization of the defined consortium in polyurethane foam has application potential for removing nitrobenzene in industrial wastewater treatment system.