Reclamation of Municipal Wastewater using a Novel Liquid-solid Circulating Fluidized Bed Bioreactor

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Abstract:

A pilot scale liquid-solid circulating fluidized bed bioreactor was established at the Adelaide Pollution Control Plant, London, Canada, to study the feasibility of this novel technology for municipal wastewater treatment using 600 μm lava rock particles as a carrier media, with emphasis on biological nutrient removal. The LSCFB generated effluent characterized by this system was characterized by <1.0 mg NH4-N/L, <5.0 mg NO3-N/L, <1.0 mg PO4-P/L, <10 mg TN/L, <10 mg SBOD/L, and 10–15 mg VSS/L, which can meet secondary effluent quality without using any chemical for phosphorus removal and conventional secondary clarification for removing suspended solids. This system can easily regenerate MWW at an organic, nitrogen, and phosphorus loading rates of 4.12 kg COD/(m3·d), 0.35 kg N/(m3·d), and 0.051 kg P/(m3·d) respectively. The observed yields were 0.12–0.16 g VSS/g COD consumed in the LSCFBs during nutrient removal from MWW. Ultraviolet disinfection test shows that the LSCFB with a filtration unit can easily meet the California Standard (<2.2 TC/100 mL) and reclaim municipal wastewater.

Keywords: biofilm; biomass yied; disinfection; nutrient removal

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864709802770072

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 These proceedings are not peer reviewed.

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