ISSN: 2577-4050
Authors: Varatharajan GR*, Vasudevan L, Bhat M, Ray D, Rajasabapathy R and Ravindran C*
Bioremediation of aquaculture water is increasing rapidly in the sustainable development of aquaculture industries. In this study, Bacillus megaterium (VBW147) and Bacillus subtilis subsp. spizizenii (VSD609) were assessed for their potential in water remediation using prawn culture tanks. During the experimental period of eight days, physicochemical parameters were analyzed with and without feed conditions treated with above bacterial strains. After treatment, B. megaterium reduced 1.091 mgL-1 of ammonia, 0.011 mgL-1 of nitrite, 0.153 mgL-1 of nitrate and 0.292 mgL1 of phosphates with feed conditions, while 0.811 mgL-1 of ammonia, 0.577 mgL-1 of nitrite, 0.127 mgL-1 of nitrate, 0.111 mgL-1 of phosphates were removed in starve conditions. B. subtilis did not show any reduction, with ammonia but eliminated 0.041 mgL-1 of nitrite, 0.258 mgL-1 of nitrate and 0.239 mgL-1 of phosphate with feed conditions. B. Subtilis although removed 0.453 mgL-1 of ammonia and 0.521 mgL-1 of nitrite, it was also found inefficient in the removal of nitrate and phosphate in starving conditions. Thus, B. Megaterium was found more efficient in removing the toxic substances than that of the B. subtilis and both strains did not show any pathogenic effect on juvenile prawns.
Keywords: Nutrients; Bacillus; Probiont; Water Purification; Bioremediation
