BIODEGRADATION OF CYANIDE COMPOUNDS BY PSEUDOMONAS-FLUORESCENS IMMOBILIZED ON ZEOLITE
SCIE
SCOPUS
- Title
- BIODEGRADATION OF CYANIDE COMPOUNDS BY PSEUDOMONAS-FLUORESCENS IMMOBILIZED ON ZEOLITE
- Authors
- PARK, JM; SUH, YJ; YANG, JW
- Date Issued
- 1994-06
- Publisher
- ELSEVIER SCIENCE INC
- Abstract
- A cyanide-degrading bacteria, Pseudomonas fluorescens NCIB 11764, was used for the treatment of wastewater containing cyanide. After successive subculture for 2 months in cyanide-containing medium, cultures were fully adapted to cyanide and able to grow in a medium containing up to 260 mg l(-1) of cyanide. By fed-batch culture supplying only cyanide, it was confirmed that cyanide was the limiting nutrient as a nitrogen source. Ammonia was found to inhibit cyanide degradation, and the rate of degradation was halved when the ammonia concentration was higher than 1 mM. In a 15-l jar fermenter, 26 mg l(-1) of cyanide was consumed almost completely within 48 h and the final yield of growth on cyanide was calculated as 4.21 mg dry cell wt mg(-1) CN. Cells of P. fluorescens were immobilized on zeolite and applied to a modified activated sludge-type reactor to mimic the actual activated sludge system of a coke-plant wastewater treatment system. In this immobilized system operated batchwise, 26 mg l(-1) of cyanide was degraded completely by 8 g l(-1) of immobilized particles within 10 h. The same reactor system was operated in a continuous mode, and the cyanide concentration of the outlet reached the stationary-state level of less than 0.1 mg l(-1) within 2 days at 0.041 h(-1) of dilution rate and within 3 days at 0.082 h(-1) of dilution rate, respectively.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/21961
- DOI
- 10.1016/0141-0229(94)90025-6
- ISSN
- 0141-0229
- Article Type
- Article
- Citation
- ENZYME AND MICROBIAL TECHNOLOGY, vol. 16, no. 6, page. 529 - 533, 1994-06
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