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In page Sewage treatment:

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The application of sewage to land is both: a type of treatment and a type of final disposal.[2]: 189  It leads to groundwater recharge and/or to evapotranspiration. Land application include slow-rate systems, rapid infiltration, subsurface infiltration, overland flow. It is done by flooding, furrows, sprinkler and dripping. It is a treatment/disposal system that requires a large amount of land per person.[citation needed]