An Innovative Submerged Anaerobic Membrane Bioreactor for Treatment of Potato Solids and Bioenergy Production

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Abstract:

A submerged anaerobic membrane bioreactor (sAnMBR) was studied for the treatment of a high organic strength wastewater containing a high level of suspended solids. A 25L reactor was operated, under mesophilic conditions (35°C), for 218 days treating a blend of primary clarifier sludge and centrifuge solids from a potato processing plant. The system achieved volumetric loading rates from 3 to 9 kgCOD/m3/d (0.1 to 0.3 gCOD/gVSS/d). Organic removal was consistently high providing 99% COD and cBOD removal in effluent. Average COD and carbonaceous BOD were less than 300 mg/L and 50 mg/L, respectively during steady operating conditions. Effluent TSS were less than 1 mg/L. Methane production yield, from influent solids, decreased from 444 to 393 mL CH4/gVSS/d as the organic loading rate (OLR) increased. Operating flux diminished from 0.28 to 0.11 m3/m2/d, as the OLR increased. Membrane fouling occurred as a result of sludge cake formation.

Keywords: Anaerobic; MBR; fouling; industrial wastes; membrane; suspended solids

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864709793954411

Publication date: January 1, 2009

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  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

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