DENITRIFICATION BY THERMOPHILIC SOIL BACTERIA WITH ETHANOL AS SUBSTRATE IN A USB REACTOR

被引:19
作者
LAURINO, CN
SINERIZ, F
机构
[1] Planta Piloto de Procesos Industriales Microbiologicos (PROIMI), San Miguel de Tucuman
关键词
D O I
10.1007/BF01041489
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
Thermophilic biological denitrification was studied in a laboratory-upflow sludge blanket reactor fed with ethanol as carbon and energy source. High denitrification efficiency (> 98%) was obtained at an ethanol:nitrate ratio > 2 and at a hydraulic retention time (HRT) of 5 hours. The performance of the system with respect to nitrate removal was very satisfactory (> 95%), even at high nitrate (235 mg NO3-N/L) and hydraulic (3 hours HRT) loading rates applied. A stable sludge was formed by spherical granules 1 to 3 mm in diameter with a content of 25,8 g VS/L and were almost exclusively composed of bacteria belonging to the genus Bacillus.
引用
收藏
页码:299 / 304
页数:6
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