A 2L beaker was used as a bioreactor for the operation of SBR
activated sludge process with an effective working volume of 1.8L.
An aquarium pump(Hailea ACO-9602,China)was used to supply
air through a porous stone diffuser that was located at the base of
the reactor with air flow rate of 4.5L/min.Even distribution of the
wastewater was achieved through continuous stirring at a speed of
350 rpm by using a hot plate(Cole-Parmer,USA).The reactor was
covered with aluminum foil to prevent evaporation.