تغييرات اكسيژن محلول در بركه هاي تثبيت اختياري

Do Variations in Facultative Stabilization Ponds

Stabilization ponds have recently attracted more attention as a natural wastewater treatment method and are currently being used in almost all developed and developing countries across the globe. The technical, economic, energy saving, and operational advantages of such treatment systems have motivated many researchers in these countries to study the improvement of stabilization ponds in order to increase their efficiency and also to lift the difficulties in their operation. In this investigation the rate of dissolved oxygen fluctuation and pH in facultative ponds at different situations were studied. The results showed the maximum oxygen concentration was increased up to 30 mg/1. The oxygen concentrations at different depth and length were varied. The pH was changed over the period of day and night the maximum value reached up to ten.