Lagoons and oxidation ponds.
D000693:Anaerobiosis; D000818:Animals; D001673:Biodegradation, Environmental; D003365:Costs and Cost Analysis; D056890:Eukaryota; D005243:Feces / Q000382:microbiology; D005374:Filtration; D005399:Fishes; D007220:Industrial Waste; D007700:Kinetics; D008974:Mollusca; D009571:Nitrilotriacetic Acid / Q000378:metabolism; D010084:Oxidation-Reduction; D012722:Sewage; D013696:Temperature; D015048:Zooplankton
D007220:Industrial Waste; D012722:Sewage; D009571:Nitrilotriacetic Acid