IMPROVEMENT OF WATER QUALITY FROM THE FISH FARMING IN RECIRCULATING SYSTEM USING ADDITIVES BASED ON ZEOLITES

Magdalena Tenciu, Elena-Eugenia Mocanu, N. Patriche, Veta Nistor, Liliana-Blondina Athanasopoulos, V.-O. Eşanu, Ira-Adeline Chihaia

Abstract
    Present scientific work propose to evidenced the chemical composition of the volcanic tuff, regarding the water quality maintenance at the optimum parameters, for breeding technologies in recirculating system, for the different fishes species with economical value. During the last years, zeolites represent a material used frequently in the technology for environment protection, based on the ionic transfer capacity and the adsorption capacity. Due to these chemical proprieties, it is regarding its implementation into the Romanian aquaculture, for a technological assurance, with optimum physical-chemical proprieties for fishes farming. The performances of experimental module were verifying trough rearing operations of Huso huso sturgeon specie. Rearing experiment developed during a 136 days period in the following conditions: monitoring of hydro-chemical parameters of the system’s technological water, using as filter the zeolyte; monitoring of health state; establishing of rearing rate in experimental units. According with the experiments, these zeolites could be and must to be a technologically constant in aquaculture through the role of depollutant, in generally.

Key words: zeolites, aquaculture, fish, recirculating system, water quality