Waste WaterWaste Disposal, FluidSewageNitrate ReductaseWater PurificationIndustrial WasteWater MicrobiologyBiological Oxygen Demand AnalysisWater Pollutants, ChemicalWaste ManagementNitrate Reductase (NADH)Water PollutantsSilver NitrateFlocculationBiodegradation, EnvironmentalRNA, Ribosomal, 16SWaste ProductsBacteriaDenitrificationDNA, RibosomalWater Pollution, ChemicalNitrogenRiversPhylogenyWater PollutionNitrate Reductase (NAD(P)H)AmmoniaMedical WasteFresh WaterNitrificationQuaternary Ammonium CompoundsSequence Analysis, DNADNA, BacterialEnvironmental MonitoringChloratesWater SupplyCarbanilidesMolecular Sequence DataAnion Transport ProteinsProteobacteriaNitrosomonasBioelectric Energy SourcesAnaerobiosisNitrogen CompoundsFiltrationOxidation-ReductionAgricultureAnostracaAgricultural IrrigationGenes, rRNAEnterovirusFertilizersGroundwaterMolybdenumBiotaBetaproteobacteriaGalliumWetlandsIsosorbide DinitrateCyclosporaEndospore-Forming BacteriaDenaturing Gradient Gel ElectrophoresisBase CompositionNitroglycerinGiardiaHydrogen-Ion ConcentrationMethaneManureWater MovementsRefuse DisposalBacteria, AnaerobicGeologic SedimentsChlorella vulgarisAir MicrobiologyPotassium CompoundsEscherichia coliOxidoreductasesNitrous OxideSoilCulture MediaSoil MicrobiologyPentaerythritol TetranitrateWater QualityNitric OxideNitritesComamonadaceaeAerobiosisPlant RootsNitrosomonadaceaeMicropore FiltersPolyphosphatesCitiesTemperatureMetals, HeavyWaterSulfatesEnvironmental RemediationRecyclingSoil PollutantsRNA, Bacterial