Details

Autor(en) / Beteiligte

• Giménez, J.B.
• Robles, A.
• Carretero, L.
• Durán, F.
• Ruano, M.V.
• Gatti, M.N.
• Ribes, J.
• Ferrer, J.
• Seco, A.

Titel

Experimental study of the anaerobic urban wastewater treatment in a submerged hollow-fibre membrane bioreactor at pilot scale

Ist Teil von

• Bioresource technology, 2011-10, Vol.102 (19), p.8799-8806

Ort / Verlag

Kidlington: Elsevier Ltd

Erscheinungsjahr

2011

Quelle

MEDLINE

Beschreibungen/Notizen

• ► Biological and separation process performance has been evaluated at 33°C, 70days SRT, and variable HRT. ► Almost 90% of COD removal was achieved with low effluent volatile fatty acid concentrations (<20mgL−1). ► The observed methane yield was quite low due to the low influent COD/SO4–S ratio and SRB and MA competition. ► No irreversible fouling problems were detected, even for high total solid concentrations. ► A flux of 10 LMH and MLTS above 22gL−1 (sub-critical conditions) led to a low TMP (<0.1bar). The aim of this study was to assess the effect of several operational variables on both biological and separation process performance in a submerged anaerobic membrane bioreactor pilot plant that treats urban wastewater. The pilot plant is equipped with two industrial hollow-fibre ultrafiltration membrane modules (PURON® Koch Membrane Systems, 30m2 of filtration surface each). It was operated under mesophilic conditions (at 33°C), 70days of SRT, and variable HRT ranging from 20 to 6h. The effects of the influent COD/SO4–S ratio (ranging from 2 to 12) and the MLTS concentration (ranging from 6 to 22gL−1) were also analysed. The main performance results were about 87% of COD removal, effluent VFA below 20mgL−1 and biogas methane concentrations over 55% v/v. Methane yield was strongly affected by the influent COD/SO4–S ratio. No irreversible fouling problems were detected, even for MLTS concentrations above 22gL−1.