Isolation And Identification Of Denitrifying Bacteria From Shrimp Cultivation Pond Soil In Parangipettai

Denitrifying bacteria were isolated from shrimp cultivation pond soil in vellar basin Parangipettai. Totally ten isolates were obtained and screened for denitrification activity. Four denitrifying isolates were selected (DNB2, DNB3, DNB5 and DNB6) and subjected to different pH and Temperature on denitrification activity. Highest nitrate removal was recorded in DNB3 at pH 7 (78.71 %) followed by pH 7.5 (76.92%), and pH 8(73.25%) with minimum nitrite accumulation of 18.41 mg/l, 21.21mg/l and 26.19mg/l respectively where as the effect of temperature on nitrate removal was recorded in DNB3 as 75.36% at 30°C and 67.8% at 35°C with minimum nitrite accumulation of 20.38 mg/l at 30°C and 93.0 mg/l at 35°C respectively.