سال انتشار: ۱۳۸۷

محل انتشار: اولین کنگره بین المللی مدیریت بهداشتی و بیماریهای آبزیان

تعداد صفحات: ۱

نویسنده(ها):

Abbas Adl-Tabatabai – Responsible of Water and Wastewater Treatment Section, Pars Peyab Consulting Engineers.
Bahareh Hassanzadeh – Responsible of Aquaculture Section, Pars Peyab Consulting Engineers

چکیده:

Objective: Many recycling aquaculture system are applied where land or water is limited. So far, due to the high cost in treating large amount of recycled aquaculture system, the approach to do so has limited its uses in this field. The purpose of this paper is to present, along with calculation, a treatment process which can be applied in some large extend to farming process where the effluent stream needs to be controlled. The simplicity of the process uses a minimum of mechanical utilities are used as to allow financial possibilities and its flexibility permits a wide range of aquaculture applications.
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.