activatedsludgeprocess biochemical biodegradation biodégradation biofilms biologicaltreatment biology bioremediation biorestauration biorestaurationinsitu causesandtheoriesofcausation chemical civil dams diseases déchets déchetsdangereux engineering environmental environmentalengineering environmentalscience general hazardouswastes healthaspects heatlthaspects india industrial industrialwatersupply innovations insitubioremediation lifesciences materials mathematicalmodels matériaux micro-organismespathogènes microbiologie microbiologiesanitaire microbiology modèlesmathématiques pathogenicmicroorganisms procédédesbouesactivées purification refuseandrefusedisposal reservoirs sanitarymicrobiology science sewage technologicalinnovations technology toxicologie toxicology traitementbiologique wastemanagement water water-supply water-supplyengineering waterreuse watersupply élimination épuration étiologie