Isolation,Identification and Degradation Characteristics of a Slight Halophilic Denitrifying Bacteria / 微生物学通报

ABSTRACT

A slight halophilic denitrifying bacteria(designated GYL)was screened from the activated sludge which was used to treat high-salinity wastewater.According to the results of morphological observation,physiological and biochemical test,sequence analysis of the 16S rDNA,strain GYL was identified as Halo-monas sp..This strain could survive at 10% salinity and the optimal salinity range for growth was 2%~7%.The suitable pH value for growth was 7.5~8.5 and sucrose was the most effective carbon source.The nitro-gen removal efficiency exceeded 80% when the temperature ranged from 25?C to 30?C.Meanwhile hetero-trophic nitrification characteristics of this strain were measured.Results showed that this strain was able to realize SND and ammonia removal rate was 98.3%.It showed that this strain could perform the whole proc-ess of bacteria denitrification independently.