Mechanical Contracting & Plumbing January-December 1909 . Described by the Engineering Review, New York. The correct method of the final dis- vancement within the past twenty years,posal of sewage from dwellings is a There can be no doubt that the use of supply, even though this contaminationmay not occur immediately but aftermany years. Among the various methods utilized bythe sanitary engineer for the final dis-posal of sewage, the septic tank #t 5tone<5tu-ttek Fig. 2.—3-inch Tile in Trench. plays a prominent part. The theory ofthis method of sewage is as follows: The
Mechanical Contracting & Plumbing January-December 1909 . Described by the Engineering Review, New York. The correct method of the final dis- vancement within the past twenty years,posal of sewage from dwellings is a There can be no doubt that the use of supply, even though this contaminationmay not occur immediately but aftermany years. Among the various methods utilized bythe sanitary engineer for the final dis-posal of sewage, the septic tank #t 5tone<5tu-ttek Fig. 2.—3-inch Tile in Trench. plays a prominent part. The theory ofthis method of sewage is as follows: The sewage from the house enters areceiving basin where it has a period ofrest of about three days. During thistime fermentation takes place, breakingup the albuminoid bodies which throw offvarious gases and allowing at the sametime the precipitation of the heavy in-organic bodies, which settle to the bot-tom. From the receiving basin the sew-age flows to the discharging basin. Herefermentation is carried further with afinal slight precipitation. When the. Fig. I.—Details of Receiving and Discharging Basins.
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