activated carbon activated sludge aerated lagoon aeration aerobic organism aerobic treatment system agricultural wastewater treatment alberta algae algal bloom alum ammonia anaerobic digestion animal husbandry aquarium atom bacteria bathing bay biofilm biogas carbon carbon dioxide caribbean chester zoo chloramine chlorination chlorine combined sewer composting constructed wetland cyanobacteria daphnia denitrification drinking water eco-industrial park ecological sanitation ecology edmonton effluent effluent guidelines electron donor elephant england enhanced biological phosphorus removal eutrophication fertilizer flocculation fruit gene germany greywater groundwater hormonal contraception hormone humanure hydrological transport model incineration industrial wastewater treatment invertebrate iran iron irrigation jurisdiction kitchen lagoon landfill limestone list of waste management concepts list of waste water treatment technologies macrophyte mechanical biological treatment membrane bioreactor merchtem mesophile methanol microorganism middle east nitrate nitrification nitrite nitrogen nitroso north america north wales oil organic compound organic matter oxygen ozone pathogen petroleum phosphorus phthalate phytoremediation protozoa pump radioactive waste recycling redox regiving reuse reverse osmosis river rotating biological contactor roughing filter runoff salt sand sand filter sanitary sewer sanitary sewer overflow sanitation sediment select society of sanitary sludge shovelers septic tank sequencing batch reactor sewage sewage collection and disposal sewage sludge treatment sewer shower sink sludge soil south america storm drain stormwater stream sub-saharan africa sugar sulfide tampon tehran thermophile tin can toilet toxin trickling filter ultraviolet united states venezuela virus voltage waste waste collection waste hierarchy waste legislation waste management waste sorting waste treatment wastewater wastewater garden water framework directive water purification wetland william lindley