Science for beginners . tpcd, Ourier TOus Su/rrAtt Fig. 265.—A septic tank. (From Practical Up-To-Date Plumbing, Clow.) pV-SIod^e blowoff pipeQ*?)«--Valve ; i F 1 z> u Septic Tank • • 35=1 ?Plan Manhole. sob soil tile Section Fig. 266.—Plan and section of septic tank suitable for mediumsized residences, two compartments. (Courtesy of Chas. Brossman.) DISPOSAL OF SEWAGE 441 is by using some type of septic tank or disposal tank and SUBSURFACE DRAINS. 520. The Septic Tank.—The modern septic tank consistsof two, and often three, compartments (Figs. 265 and 266).Each of these compartments is cem
Science for beginners . tpcd, Ourier TOus Su/rrAtt Fig. 265.—A septic tank. (From Practical Up-To-Date Plumbing, Clow.) pV-SIod^e blowoff pipeQ*?)«--Valve ; i F 1 z> u Septic Tank • • 35=1 ?Plan Manhole. sob soil tile Section Fig. 266.—Plan and section of septic tank suitable for mediumsized residences, two compartments. (Courtesy of Chas. Brossman.) DISPOSAL OF SEWAGE 441 is by using some type of septic tank or disposal tank and SUBSURFACE DRAINS. 520. The Septic Tank.—The modern septic tank consistsof two, and often three, compartments (Figs. 265 and 266).Each of these compartments is cemented so as to be water-tight. The sewage from the house enters compartment No. this compartment anaerobic bacteria (Art. 318, page 287)attack the sewage and by decomposing it soon cause the solidmaterial to dissolve, or, as we say, to liquefy. When work-ing properly, this process requires but a short time to liquefymost solid material in sewage. Even paper and cloth areliquefied within a few weeks or months. The liquefying Underdraws _ . Plan XTank /^ jL -/
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectscience, bookyear1921
