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SBBR工艺处理养猪废水脱氮除磷的影响因素研究(英文).docx

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SBBR工艺处理养猪废水脱氮除磷的影响因素研究(英文) ResearchontheimpactfactorsofSBBRprocessfortreatingpigwastewaterandremovingnitrogenandphosphorus Introduction Inrecentyears,thedevelopmentofmodernanimalhusbandryhasbeenaccompaniedbyarapidincreaseinthedischargeofpigwastewater,whichhascausedseriousenvironmentalpollutionproblems.Pigwastewatercontainshighconcentrationsoforganicmatter,nitrogen,andphosphorus,whichcanleadtoeutrophicationofwaterbodiesandcausesignificantharmtoaquaticecosystemsandhumanhealth.Inordertoaddressthepollutionofpigwastewater,variousmethodshavebeendeveloped,amongwhichthesequencingbatchbiofilmreactor(SBBR)processhasattractedconsiderableattentionduetoitshighefficiencyandlowcost. SBBRprocessfortreatingpigwastewaterandremovingnitrogenandphosphorus Thesequencingbatchbiofilmreactorisakindofaerobicbiologicaltreatmenttechnologythatcombinesthecharacteristicsofabiofilmprocessandasequencingbatchreactor.Ithasaseriesofoperatingcycles,includingfeeding,reaction,settlement,anddischarge.Duringeachcycle,thereactoralternatesbetweenanoxicandaerobicconditions,whichcaneffectivelystripnitrogenandphosphorusfromthepigwastewater. TheSBBRprocessinvolvestheuseofmicroorganismsthatattachtoabiofilmonfixedcarriers.Thesemicroorganismsplayanimportantroleindegradingorganicpollutantsandremovingnutrientssuchasnitrogenandphosphorusfromthewastewater.Nitrogenremovalisachievedprimarilythroughnitrificationanddenitrificationprocesses.Theammoniumnitrogeninthewastewaterisfirstoxidizedtonitriteandthentonitrateunderaerobicconditions.Thenitrateisthenreducedtoinertnitrogengasunderanoxicconditionsthroughdenitrification.Phosphorusremovalisachievedprimarilybytheformationofphosphateprecipitateswithmetalcationssuchascalcium,aluminum,andiron. ImpactfactorsofSBBRprocessfortreatingpigwastewaterandremovingnitrogenandphosphorus Temperature:TemperatureisanimportantfactorthataffectstheperformanceoftheSBBRprocess.Theoptimaltemperatureforthegrowthofmicroorganismsinthereactoris25-35°C.Attemperaturesbelow15°C,thebiologicalactivityofmicro