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反硝化条件下苯酚的微生物降解

Microbial degradation of phenol in denitrifying conditions.

作者信息

Błaszczyk M, Przytocka-Jusiak M, Suszek A, Mielcarek A

机构信息

Institute of Microbiology, University of Warsaw, Poland.

出版信息

Acta Microbiol Pol. 1998;47(1):65-75.

PMID:9735058
Abstract

The biodegradation of phenpol in anaerobic conditions by mixed population of bacteria in batch cultures or continuous cultures in packed bed reactor in medium with phenol as sole carbon source was effective. Phenol in concentrations up to 500 mg/l was degraded by bacteria in batch cultures (incubation temperature 30 degrees C) with increasing maximal rate without lag phase and at higher concentrations (up to 1000 mg/l) the activity of the bacteria was preceded by a lag phase lasting from 9 to 15 days. Phenol was degraded in continuous cultures with maximum efficiency (about 2500 mg/l x day) in the following conditions: incubation temperature 30 degrees C, phenol concentration in the medium of 200 mg/l and retention time of about 2 hours. Lowering of the temperature of the culture to 13 degrees C and 20 degrees C resulted in 10 and 5-fold decrease in the efficiency of the process, expressed as mg/l X day, respectively. Analysis of the composition of the bacteria among the facultatively growing Gram-negative rods showed that the incubation temperature visibly affected the species composition and domination pattern of denitrifying bacteria although their percent participation remained the same.

摘要

在以苯酚为唯一碳源的培养基中,通过分批培养或填充床反应器中的连续培养,利用混合菌群在厌氧条件下对苯酚进行生物降解是有效的。在分批培养中(培养温度30℃),细菌能降解浓度高达500mg/L的苯酚,最大降解速率不断增加且无延迟期;而在更高浓度(高达1000mg/L)时,细菌活性会有一个持续9至15天的延迟期。在以下条件下,连续培养中苯酚的降解效率最高(约2500mg/L·天):培养温度30℃,培养基中苯酚浓度200mg/L,保留时间约2小时。将培养温度降至13℃和20℃时,该过程的效率分别降低了10倍和5倍(以mg/L·天表示)。对兼性生长的革兰氏阴性杆菌中的细菌组成进行分析表明,培养温度明显影响反硝化细菌的物种组成和优势模式,尽管它们的参与百分比保持不变。

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