In our system, the
upwelling afloat from disk membrane diffuser kept the solids
J.-Y. 694 Liang, Y.-H. Chien / International Biodeterioration & Biodegradation 85 (2013) 693e700
suspended and the effective aeration from the diffuser could
mineralize the organic particles so that little deposition was
observed in tank bottom at the end of experiment.