Effect of type of wastewater on the oxygen uptake rate in batch reactors

Abstract EN

Oxygen uptake rate is one of the important parameters in operating the activated sludge systems.

In this research, six types of wastewater were used to investigate the effect of wastewater kinds on both of oxygen uptake rate and specific oxygen uptake rate.

The wastewaters involved in the study were domestic, hospital, dairy, sugar industry, textile and soft drinking wastewater.

The procedure was carried out using four batch reactors operating on limit of aerating times starting from 2 to 24 hours.

The results of the study showed that, the type of wastewater influences both of oxygen uptake rate and of specific oxygen uptake rate.

The time of aeration has also effect on these parameters.

Increasing aeration time minimizes effect of type of wastewater.

The organic removal rate of the system positively effect on the oxygen uptake rate values.

The logarithmic form of equation has proven to be efficient in describing this effect.