Efficacy of relaxation, backflushing, chemical cleaning and clogging removal for an immersed hollow fibre membrane bioreactor.
作者： T Zsirai , P Buzatu , P Aerts , S Judd , None
DOI: 10.1016/J.WATRES.2012.05.004
关键词: Chemistry 、 Backflush accounting 、 Pulp and paper industry 、 Aeration 、 Fouling mitigation 、 Permeability (earth sciences) 、 Fouling 、 Clogging 、 Membrane bioreactor 、 Chromatography 、 Bioreactor
摘要: Abstract A pilot-scale hollow fibre immersed MBR, challenged with real municipal wastewater, was studied and operated under conditions identical to those prevailing at full-scale assess the relative influence of backflushing, relaxation, chemical enhanced backflushing (CEB) declogging on permeability decline recovery. The relaxation initially assessed using conventional flux step method; results indicated reversible fouling be similar for each method, whilst irreversible rate significantly reduced by backflushing. For a given total backflush volume, mitigation found marginally better through employing higher fluxes than longer durations. impact CEB recovery low high operation more conservative yield sustained permeability. Under aggressive operating - up 35 L m −2 h −1 specific aeration demand values 0.25 Nm 3 /(m 2 h) – long-term took place which not ameliorated cleaning. On membrane gentle agitation significant, but followed rapid over course few hours. Results suggested control clogging greater importance that in sustaining
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