Eficacia de la aplicación de un consorcio bacteriano elaborado a base de Bacillus Subtilis y Bacillus Licheniformis para la reducción de materia orgánica en sedimentos de piscinas camaroneras.

Abstract

The culture of Penaeus vannamei carried out in ponds presents an increase in intensification that goes hand in hand with the technification of production, but in turn, this generates an increase in the accumulation of unconsumed feed, dead organisms, feces, etc., and as a consequence, an increase in organic matter. All of this causes a series of problems in the cultivation unit, both in the water and sediment, and therefore harms the health of the organisms and their environment. The elimination of these sediments rich in organic matter, either through displacement or mechanical removal of the sediment, implies a cost in production. Therefore, this research aimed to evaluate the bioremediation potential by a bacterial consortium made up of Bacillus subtilis and Bacillus licheniformis (BIO.BS.BL) to reduce the content of organic matter in sediments from shrimp ponds as a biological strategy to increase the decomposition of organic compounds from aquaculture origin and thus reducing production costs.For this purpose, a completely randomized open experiment was conducted with twelve experimental units with a capacity of 15 liters to evaluate the application of BIO.BS.BL through three treatments (1.5 L ha-1, 3 L ha-1, 4.5 L ha-1) and a control (0 L ha-1), to which only the bacterial activation medium was applied. The study was carried out for 20 days, and the change generated in organic matter in the sediment was determined using the Walkley & Black method. Additionally, the Vibrio load was determined by serial dilutions to evaluate the change in the pathogenic bacterial community.