Membrane bioreactors for winery wastewater treatment: case-studies at full scale.
The membrane bioreactor technology (MBR) is nowadays a suitable alternative for winery wastewater treatment, thanks to low footprint, complete suspended solids removal, high efficiency in COD abatement and quick start-up. In this paper, data from two full-scale MBRs equipped with flat-sheet membranes (plant A and plant B) are presented and discussed. COD characterisation by respirometry pointed out the high biodegradability degree of both wastewater, with a strong prevalence of the readily biodegradable fraction. An extended version of Activated Sludge Model No. 3 was used to fit the experimental OUR profiles and to assess the maximum growth rate of heterotrophic biomass on sludge samples collected at both sites; the stoichiometric yield coefficients were also calculated. Sludge filterability and dewaterability were investigated with batch tests; laboratory results confirmed the field observations. Finally, some considerations are listed, aimed at defining possible key-issues for optimal process design and operation.
Guglielmi
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Department of Civil and Environmental Engineering, University of Trento, Via Mesiano, 77, 38100 Trento, Italy. giuseppe.guglielmi@ing.unitn.it
Andreottola
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Foladori
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Ziglio
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G
D018533:Biomass; D019149:Bioreactors; D005374:Filtration; D007700:Kinetics; D008567:Membranes, Artificial; D010100:Oxygen; D012722:Sewage; D014865:Waste Disposal, Fluid / Q000379:methods*; D014920:Wine
D008567:Membranes, Artificial; D012722:Sewage; D010100:Oxygen