Abstract

For this paper, synthetic wastewater was treated in two membrane bioreactors, with an accent on the removal of total nitrogen through nitrification and denitrification processes conducted as a batch process and as a process with continuous feed inflow. In the first bioreactor, with the flat sheet membrane, the specific denitrification rate during the batch process was 1.83 mg NO3 −-N/g MLSS h, with the glucose added all at once at the start of the process. When the glucose was being added continuously, specific denitrification rate was 1.2 mg NO3 −-N/g MLSS h. Without added glucose, specific denitrification rate was 0.4 mg NO3 −-N/g MLSS h. Nitrogen removal was conducted with continuous feed inflow and with intermittent aeration with a different duration of aeration and non-aeration phases. The best results in the experiment were achieved when the aeration regime was set to 60 minutes aeration and 120 minutes without aeration, resulting in the reduction of total nitrogen from 45 mg/L to about 12 mg/L. In ...

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