SewageWaste Disposal, FluidToilet FacilitiesWaste ManagementSanitationAscaris suumVietnamAgricultureFecesWater MicrobiologyIndustrial WasteFertilizersWater PurificationT-2 ToxinBioreactorsBiodegradation, EnvironmentalHeptachlorRefuse DisposalBacteriaEnterococcaceaeSanitary EngineeringFlocculationPsylliumRNA, Ribosomal, 16SWaste WaterWater PollutionAnaerobiosisEnterovirusPhylogenyWater SupplyBiotransformationArsenic PoisoningMolecular Sequence DataDNA, BacterialDNA, RibosomalSequence Analysis, DNATrematode Infections