2 research outputs found
NITRATE REMOVAL POTENTIAL OF DIFFERENT MICROBIAL CONSORTIA, FEASIBLE FOR WASTEWATER TREATMENT IN RAS
In Recirculating Aquaculture System (RAS) the water effluent from fish tanks is reused after cleansing mainly with
respect to organic substances, nitrate (NO3
-), nitrite (NO2
-), ammonium (NH4
+) and phosphate (PO4
-3) ions. One of the
most used and promising cleansing techniques in modern RAS is the biological treatment of wastewaters performed by
denitrifying bacteria which can convert the NO3
- to N2. In this study we estimated the aerobic denitrifying performances
of different microbial consortia isolated from various sources, feasible to be further used in RAS. The kinetics of NO3
-
consumption in either batch or discontinuous conditions, on synthetic culture media with acetate or ethanol as sole
carbon source and nitrate as the main final electron acceptor, has been characterized. The experimental data showed
that the selected microbial populations can clean water with efficiencies between 86% to100%, matching the
requirements of international laws and making them suitable for employment in wastewater treatment in RAS