6533b7d3fe1ef96bd1260bf6

RESEARCH PRODUCT

Nitrogen removal from on-site treated anaerobic effluents using intermittently aerated moving bed biofilm reactors at low temperatures

Lara ValentínSari LuostarinenJukka RintalaSami Luste

subject

0106 biological sciencesBiochemical oxygen demandEnvironmental EngineeringDenitrificationNitrogen010501 environmental sciences01 natural sciencesBioreactors010608 biotechnologyBioreactorWaste Management and Disposal0105 earth and related environmental sciencesWater Science and TechnologyCivil and Structural EngineeringWaste managementChemistryMoving bed biofilm reactorEcological ModelingChemical oxygen demandPollution6. Clean waterCold TemperatureWastewaterBiofilmsNitrificationAerationWater Pollutants Chemical

description

Abstract On-site post-treatment of anaerobically pre-treated dairy parlour wastewater (DPWW e ; 10 °C) and mixture of kitchen waste and black water (BWKW e ; 20 °C) was studied in moving bed biofilm reactors (MBBR). The focus was on removal of nitrogen and of residual chemical oxygen demand (COD). Moreover, the effect of intermittent aeration and continuous vs. sequencing batch operation was studied. All MBBRs removed 50–60% of nitrogen and 40–70% of total COD (COD t ). Complete nitrification was achieved, but denitrification was restricted by lack of carbon. Nitrogen removal was achieved in a single reactor by applying intermittent aeration. Continuous and sequencing batch operation provided similar nitrogen and COD removal, wherefore simpler continuous feeding may be preferred for on-site applications. Combination of pre-treating upflow anaerobic sludge blanket (UASB) -septic tank and MBBR removed over 92% of COD t , 99% of biological oxygen demand (BOD 7 ), and 65–70% of nitrogen.

yearjournalcountryeditionlanguage
2005-08-23Water Research
https://doi.org/10.1016/j.watres.2006.02.022