engleski

Implementation of Passive Air Pump in Wastewater Treatment

In the processes of biological treatment of wastewater, oxygen concentration plays a significant role. In conventional mechanical technology, oxygen is being added by use of the mechanical equipment for air pumping. In the constructed wetlands, oxygen is being infiltrated into water through water surface, as well as through plant roots. In this paper the results of the aeration by use of passive air pump (PAP) consisting of a vessel filled with coarse gravel granulation, in which water flows in continuously and is being discharged discontinuously by use of a siphon have been presented. The passive air pump is to be installed between pre treatment (settling tank) and wetlands in which wastewater is being treated biologically. In this way disposable potential energy can be used for enriching water with oxygen needed for biological processes. In the performed research, aeration quantity in dependence on granulation size, siphon level, retention of water in PAP and discharge has been measured. The research has shown that it is possible to benefit from terrain decline for water aeration by using the passive air pump. In that way 2.5 - 3.5 mg/l of oxygen can be added which can improve processes of wastewater treatment.

biological treatment of wastewater; passive air pump

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