Determination of the optimal technological parameters for increasing the oxygen transfer rate of a modified submersible rotating biofilter

The modified submersible rotating biofilter MSRB was developed and patented to improve the efficiency of wastewater treatment in small settlements in Syria by performing structural modifications in the biofilter body without the need for additional aeration elements. 112 experiments were carried out on two types of biomass carriers and, as a result, optimal pairs of technological parameters were obtained to achieve the highest oxygen transfer rate OTR values. The highest values of the OTR when using the first biomass carrier were at the low filling percentage of the drum of 60% and immersion depth of the drum in the liquid 35%, while the highest values of OTR when using the second biomass carrier were at the high filling percentage of the drum 90% and low immersion depth 15%. Comparison of the obtained values of the standard aeration efficiency SAE for the MSRB with the results of similar studies showed that the SAE values of the MSRB increased by 58.29%.