Primary Aeration Chamber This is the main receptor for all incoming household water. Raw effluent enters the chamber from the household sewer connection. The incoming sewage is aerated on a cyclic basis (aerated for a set period, followed by a set period where no air is added-anoxic). Air is supplied by a diaphragm type air blower housed in the motor box, mounted directly above the primary chamber. The aeration process allows micro-organisms contained in the wastewater, through aerobic biological activity to break down and consume the organics and nutrients within the wastewater. Aeration is supplied to the primary chamber via a fine bubble air diffuser. Correct operation of the air blower is monitored via a pressure switch that will activate the ‘aeration fault’ alarm, should the air output drop below the required limit. The pre-treated water is periodically transferred into the MBR chamber for further digestion and membrane filtration. Frequency of the transfer is determined by the hydraulic loading applied to the recycling system. In this type of Aerated Wastewater Treatment System (AWTS) there is almost no build up of excess sludge, as all of the organic matter and excess bio-mass is oxidised (digested). Sludge levels are monitored and recorded at the prescribed service intervals, as an indicator, to ensure the treatment process is working correctly. This is carried out during regular preventative maintenance. MBR Chamber The MBR chamber contains the membrane housing, membranes and diffuser assembly. The MBR chamber is aerated by a diffuser attached to the bottom of the membrane housing. Air is supplied by the air blower housed in the motor box, mounted directly above the primary chamber. The aeration process keeps micro-organisms (naturally contained within the water) active. Aeration is continuously supplied to the MBR chamber via a fine bubble air diffuser. Operation of the air blower is monitored via a pressure switch that activates the ‘aeration fault’ alarm, should the air output drop below the required limit. In the Nova Clear treatment process the membranes are self cleaning, utilising the shearing action of the diffused air and mixed liquor* as it rises, to scour the external face of the membranes removing any trapped particles, or build up of bio-mass.