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aerated lagoon
An aerated lagoon or aerated basin is a holding and/or treatment pond provided with artificial aeration to promote the biological oxidation of wastewaters. There are many other biological processes for treatment of wastewaters, for example activated sludge, trickling filters, rotating biological contactors and biofilters. They all have in common the use of oxygen (or air) and microbial action to biotreat the pollutants in wastewaters.
==Types of aerated lagoons or basins==
*Suspension mixed lagoons, where there is less energy provided by the aeration equipment to keep the sludge in suspension.
*Facultative lagoons, where there is insufficient energy provided by the aeration equipment to keep the sludge in suspension and solids settle to the lagoon floor. The biodegradable solids in the settled sludge then degrade anaerobically.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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