Oxidation of Hydrogen sulfide, Ammonia nitrogen and Nitrite nitrogen by Bacillus sp. Isolated from West Coast of Korea

Abstract

In the aquaculture industry, the biological treatment using probiotics for eliminating hydrogen sulfide, ammonia nitrogen and nitrite nitrogen is receiving attention. In this study, Bacillus sp. TO-3, Bacillus sp. TO-10 and Bacillus sp. TO-12 were isolated from the west coast of Korea and oxidation ability of hydrogen sulfide, ammonia nitrogen and nitrite nitrogen were analyzed. Bacillus sp. TO-10 had high oxidation toward hydrogen sulfide by oxidizing 100% and Bacillus sp. TO-3 and TO-12 each had hydrogen sulfide oxidation of 49.53% and 69.03%. Bacillus sp. TO-10 and Bacillus sp. TO-12 had ammonia nitrogen oxidation approximately of 32.7 mg/L, while Bacillus sp. TO-3 had 11.4 mg/L of ammonia nitrogen oxidation. Bacillus sp. TO-3, Bacillus sp. TO-10 and Bacillus sp. TO-12 all had high oxidation toward nitrite nitrogen by oxidizing 100% of 137.46 mg/L nitrite nitrogen. Therefore, Bacillus sp. TO-3, Bacillus sp. TO-10 and Bacillus sp. TO-12 are possible probiotics used as water quality improvement of eliminating hydrogen sulfide, ammonia nitrogen and nitrite nitrogen.