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Author Walker, P.; Nerenberg, R.; Pizarro, G.; Aybar, M.; Pavissich, J.P.; González, B.; Pastén, P. doi  openurl
  Title Nitrate increases the capacity of an aerobic moving-bed biofilm reactor (MBBR) for winery wastewater treatment Type
  Year 2024 Publication Water Science And Technology Abbreviated Journal Water Sci. Technol.  
  Volume Early Access Issue Pages  
  Keywords biofilms; BOD removal; denitrification; kinetics; modeling  
  Abstract We used bench-scale tests and mathematical modeling to explore chemical oxygen demand (COD) removal rates in a moving-bed biofilm reactor (MBBR) for winery wastewater treatment, using either urea or nitrate as a nitrogen source. With urea addition, the COD removal fluxes ranged from 34 to 45 gCOD/m(2)-d. However, when nitrate was added, fluxes increased up to 65 gCOD/m(2)-d, twice the amount reported for aerobic biofilms for winery wastewater treatment. A one-dimensional biofilm model, calibrated with data from respirometric tests, accurately captured the experimental results. Both experimental and modelling results suggest that nitrate significantly increased MBBR capacity by stimulating COD oxidation in the deeper, oxygen-limited regions of the biofilm. Our research suggests that the addition of nitrate, or other energetic and broadly used electron acceptors, may provide a cost-effective means of covering peak COD loads in biofilm processes for winery or another industrial wastewater treatment.  
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  Series Volume Series Issue Edition  
  ISSN 0273-1223 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:001172605000001 Approved  
  Call Number UAI @ alexi.delcanto @ Serial 1957  
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