is in operation primary conduit 150 along with primary pumping device 160 transport return flow in the form of a slurry from the granule collector 140 to the discharge pipe 128 for reuse a secondary conduit 170 is also used in this embodiment to transfer liquid only from the tank 130 to the treatment chamber 120 to flush any remaining granules off of articles 124 at the end of a cleaning cycle secondary conduit consists of a secondary lower conduit 172 and a secondary upper conduit 174 connected by a secondary pumping device 180 which can be much smaller than the primary pumping device 160 because the liquid only return is much less voluminous than the return flow running through primary conduit 150 secondary lower conduit 172 takes the liquid that seeps through the perforations 142 of granule collector 140 from space 132 below granule collector 140 to secondary pumping device 170 from there the liquid is pumped through secondary upper conduit 174 to a secondary discharge pipe 129 fig9 and 10 illustrate a variation of dishwashing apparatus 110 in this design a suction conduit 156 takes the place of lower conduit 152 of the previous design suction conduit 156 feeds into granule collector 140 through top side 144 so that the initial direction of the return flow is upwards thus the deflector 148 of the previous design is not necessary because there is no danger of granules falling into suction conduit 156 at the end of a cleaning cycle suction conduit 156 also contains a coupling or joint.