دانلود مقاله TREATMENT PROCESS FOR RECYCLED AQUACULTURE WATER AND DISEASE PREVENTION IN LARGE TROUT FARMING SYSTEMS
سال انتشار: ۱۳۸۷
محل انتشار: اولین کنگره بین المللی مدیریت بهداشتی و بیماریهای آبزیان
تعداد صفحات: ۱
Abbas Adl-Tabatabai – Responsible of Water and Wastewater Treatment Section, Pars Peyab Consulting Engineers.
Bahareh Hassanzadeh – Responsible of Aquaculture Section, Pars Peyab Consulting Engineers
Method & Materials: In the presented design treatment process, the maximum effluent flow from the raceway is about 0.45 m3/sec (45000 kg fish/day) with a recycled water of 90% (0.40 m3/sec) as influent to the treatment plant. Operational units included in the treatment process are: a mechanical screen, a tube settling channel, a pump chamber, a fixed biofilter, and a UV disinfection unit. The tube settling channel and the fixed biofilter units are specially designed for raceway recycling water process. Recycled water as well as incoming water is periodically monitored and oxygen depletion upgraded by in line air
Results & Conclusion: The presented treatment process designed for Pars Ghezel trout fish farming in Haraz (North of Iran) can reach an efficiency of about 95% and the water quality is more than what it is expected. The maximum cleaning period of the fixed biofilter bed do not exceed twice a year depending on the organic load of the effluent of the raceway. In the overall, all aspects of the production environment may be controlled to achieve optimum growth, a lower water consumption per ton of fish produced can be obtained, production facility can be operational all year round, the impact on the external environment is minimized and control of diseases is facilitated since farming runs almost in a closed circuit.