Application of immobilized mixed bacterial culture for the degradation of phenol present in oil refinery effluent

被引:26
作者
Kapoor, A [1 ]
Kumar, R
Kumar, A
Sharma, A
Prasad, S
机构
[1] CSIR, Ctr Biochem Technol, Mall Rd, Delhi 110007, India
[2] Delhi Inst Technol, Delhi, India
来源
JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING | 1998年 / 33卷 / 06期
关键词
phenol degradation; biodegradation; immobilization; microbial consortia;
D O I
10.1080/10934529809376773
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Free and calcium alginate entrapped cells of four microorganisms namely Pseudomonas aeruginosa, Pseudomonas fluorescens, Serratia sp., and Yersinia sp.. have been examined for degradation of phenol, present in oil refinery effluent by observing growth and tolerance capacity against toxic effects of phenol. The study of tolerance capacity of all the four microorganisms for different sublethal concentrations have shown that phenol concentrations above 200 mg/l was toxic to Pseudomonas fluorescens while other three microorganisms tolerated phenol upto 400 mg/l. These four microorganisms were mixed for the formulation of microbial consortia and further used for the biodegradation of phenol present in oil refinery effluent. At bacteriostatic concentrations of phenol, toxicity effect has been found to be significantly lower in the case of immobilized bacteria in comparison to free cells. The immobilized microorganisms have been found to degrade 100% of phenol in 96 hrs., while the free cells degraded 80% phenol in 96 hrs. The oil refinery effluent's pollutional strength has been determined on the basis of Chemical Oxygen Demand (COD) and Biochemical Oxygen Demand (BOD) tests besides the determination of phenol contents in various layers of oil refinery effluent. The immobilized mixed bacterial cells were able to degrade 37% of phenol present in oil refinery effluent within 6 hrs. The viability of the system is discussed in terms of its industrial application.
引用
收藏
页码:1009 / 1021
页数:13
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