This page consists of a list of wastewater treatment technologies: • Activated sludge model • Activated sludge systems • Adsorption/Bio-oxidation process • Advanced oxidation process • Aerated lagoon • Aerobic granular reactor • Aerobic granular sludge technology • Aerobic granulation • Aerobic treatment system • Anaerobic clarigester • Anaerobic digester types • Anaerobic digestion • Anaerobic filter • Anaerobic lagoon • Anammox • API oil–water separator • Belt filter • Bioconversion of biomass to mixed alcohol fuels • Biofilters • Bioreactor • Bioretention • Capacitive deionization • Carbon filtering • Cesspit • Chemical addition wastewater treatment • Clarifier • Coarse bubble diffusers • Composting toilet • Constructed wetland • Cross-flow filtration • Dark fermentation • Decanter centrifuge • Decentralized wastewater system • Diffuser (sewage) • Dissolved air flotation • Dissolved gas flotation • Desalination • Distillation • Effluent Decontamination System • Electro-oxidation • Electrocoagulation • Electrodeionization • Electrodialysis • Electrolysis • Enhanced biological phosphorus removal • Expanded granular sludge bed digestion • Extended aeration • Facultative lagoon • Fenton's reagent • Filtration • Fine bubble diffusers • Flocculation & sedimentation • Flotation process • Forward osmosis • Froth flotation • Hydrocyclone • Imhoff tank • Induced gas flotation • Integrated fixed-film activated sludge (IFAS) • Ion exchange • Lamella clarifier (inclined plate clarifier) • Living Machine • Maceration (sewage) • Media filter • Membrane bioreactor • Membrane distillation • Membrane fouling • Microbial fuel cell • Microflotation • Moving bed biofilm reactor • Nanotechnology • Nereda • Oil–water separator • Organisms used in water purification • Parallel plate oil–water separator • Photobioreactor • Reed bed • Regenerative thermal oxidizer • Retention basin • Reverse osmosis • Rotating biological contactor • Sand filter • Screen filter • Sedimentation (water treatment) • Septic tank • Septic tank conversion • Sequencing batch reactor • Sewage treatment • Skimmer (machine) • Slow sand filter • Stabilization pond • Supercritical water oxidation (SCWO) • Thermal hydrolysis • Treatment pond • Trickle-bed reactor • Trickling filter • Ultrafiltration • Ultraviolet disinfection • Upflow anaerobic sludge blanket digestion • Urine-diverting dry toilet • Vermifilter • Vacuum evaporation • Wet oxidation