Comparison of traditional methods with the technology of using water-improving probiotics Bacillus and Sodium bicarbonate in reducing the inflow of effluent resulting from multiple shifts of shrimp pond water into the waters of the Persian Gulf

Abstract

Introduction: The development of shrimp farming activities in the Persian Gulf watershed has caused a lot of effluent to enter the Persian Gulf during the shrimp farming season using traditional methods. In addition to damaging the aquatic ecosystem, the entry of effluent into the Persian Gulf also causes a lot of damage to fish farms in cages. This study was conducted in the southern Rood-e-Shoor of Bushehr province with the aim of using water improvement technology to enhance physicochemical performance of water and to deminish the pollution load of effluent from Vannamei shrimp farms.
Materials & Methods: Four experimental treatments including the first treatment (control) without adding probiotics Bacillus (P) and sodium bicarbonate (B) to water, 2 (B=10 kg/ha, P=2.25×1010cfu.ml-1) and 3 (B=20kg/ha,P=4.5×1010cfu.ml-1) and 4 (B=30 kg/ha, P=6.75×1010 cfu.ml-1) were examined.
Results: After nurture period, important physicochemical indicators of water were analyzed, and their results showed a significant difference compared to the control group (P<0.05). Nitrite and turbidity which are two important indicators of organic matter and water effluent compared to other indicators showed a significant decrease due to the performance and type of probiotic and its appropriate time of consumption during the breeding period. In this method, probiotic technology was used to clean and improve the water in the pool itself, in other words, one stage before the effluent enters the drains and there was enough time to reduce pollution in the shrimp farming pond. As a result, in comparison with the traditional method of nurture with new technology, on the one hand, the ecosystem of shrimp farms is in equilibrium and on the other hand, with the exit of this water from the Persian Gulf ecosystem farm, it is not affected by pollution pressures.
Conclusion: In general, the technical methods of using water-improving probiotics reduced the amount of pollution in the effluent into the sea and reduced the change of water in the ponds and could play a very important role in maintaining the ecological balance of the Persian Gulf.