Hydrogen SulfideWaste WaterWaste Disposal, FluidSewageWater PurificationSulfidesIndustrial WasteWater MicrobiologyBiological Oxygen Demand AnalysisWater Pollutants, ChemicalWaste ManagementCystathionine gamma-LyaseBiodegradation, EnvironmentalWater PollutantsFlocculationRNA, Ribosomal, 16SWaste ProductsBacteriaThiosulfatesSulfur OxidesDNA, RibosomalSulfurAnaerobiosisFresh WaterPhylogenyMedical WasteRiversWater Pollution, ChemicalWater PollutionSequence Analysis, DNASulindacNitrificationCystathionine beta-SynthaseDNA, BacterialCarbanilidesEnvironmental MonitoringProteobacteriaMustard GasOxidation-ReductionDenitrificationSulfatesFiltrationBioelectric Energy SourcesMolecular Sequence DataAllyl CompoundsAmmoniaNitrosomonasSulfur-Reducing BacteriaAnostracaWater SupplyGenes, rRNAAgricultural IrrigationBacteria, AnaerobicEnterovirusAerobiosisGeologic SedimentsMethaneSulfur CompoundsNitrogenAlkynesBiotaCyclosporaAgricultureNitritesGiardiaGroundwaterDenaturing Gradient Gel ElectrophoresisBase CompositionEndospore-Forming BacteriaWetlandsChlorella vulgarisHydrogen-Ion ConcentrationAir MicrobiologyArchaeaManureDeltaproteobacteriaRefuse DisposalSeawaterNitratesPolychaetaSulfonium CompoundsBetaproteobacteriaWater QualityMetals, HeavyOrganothiophosphorus CompoundsAutotrophic ProcessesNitrosomonadaceaeRNA, BacterialEnvironmental RemediationTemperatureRecyclingBiodiversityWater MovementsOxidoreductasesVirusesEnvironmental MicrobiologyCitiesAlkaliesQuaternary Ammonium CompoundsPoliovirus