Drainage is a septic tank on the site of a country house. drain well construction in the yard. Sewage treatment pond technology home sewer

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aeration anaerobic bacterial biological cement chambers construction contaminants cover decomposition dirty disposal ecological effluent elimination environment environmental equipment facility fecal green grey groundwater home house industrial industry installation microbiology microorganisms percolation pipes plumber pollution process pump rural septic septic tank sewage sewer sump system tank tanks underground waste wastewater water
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