Abstract

Membrane bioreactors nowadays are intensively applied in wastewater treatment worldwide. Such type of treatment systems have a large scope of implementation at facilities of different capacity. A detailed study required to analyze how to implement reconstruction of WWTP by means of membrane equipment that can be located close to existing facilities of biological treatment in small containers without the installation of new capital containers is required. Following that goal there is a certain interest to investigate the operation of side-stream membrane bioreactors under various pressure conditions and to compare its corresponding efficiency and costs (capital and operation). The paper is focused on estimation of operation parameters (backwash frequency, power consumption and specific energy consumption) for three values (1,6 g/L, 2,5 g/L and 7 g/L) of mixed liquor suspended solids (MLSS) if the filtration goes under pressure of 0,5 bar.

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