Abstract
In this research, five experimental plants have been established and operated using
synthetic domestic wastewater in order to study the effect of some operational
parameters on the removal efficiency of organic and nutrients pollutants in Bardenpho
Process. The results of the research proved that the removal efficiency of organic,
nitrogen, and phosphorus materials were higher in the reactors that work by Bardenpho
process comparing to the ordinary activated sludge system. Also the biological sludge
resulted from Bardenpho reactors has better settling characteristics. Likewise, the pH
values in the plants work by Bardenpho process were lower than those in the plant that
work by ordinary activated sludge system. The results of the study also shown that the
removal efficiency of organic materials in the Bardenpho reactors increases by the
reduction of volumetric ratio of the anaerobic to aerobic zone, in contrast, the
concentrations of Nitrate, Ammonia, and Phosphate decrease by the reduction this ratio,
in addition, the value of SVI decreases by increasing the size of anaerobic zone. On the
other hand, The results also proved that increasing the hydraulic detention time (HRT)
lead to increase the efficiency of removing organic, nitrogen, and phosphorus materials
of the biological reactors that work by Bardenpho process. Moreover, increasing the
HRT leads to increase value of the sludge volume index (SVI) at all of the Bardenpho
and ordinary activated sludge reactors. In contrast, the value of pH drops by the
increasing of hydraulic detention time.
