Mechanical Contracting & Plumbing January-December 1912 . ponding to the normal ca-pacity of the tank. This may lead tosome surface ditch or onto land at asufficiently low level. It is merely pro-vided to guard against negligence of theman in charge of the plant. The attend-ant is instructed to empty the tanktwice each day. The same collectingtank can also be used if a bricking fil-ter or contact beds are used. In amajority of cases owing to the rockyformation of the country, land treat-ment is not feasible, and therefore thefinal purification must be accomplishedpreferably by contact filter b
Mechanical Contracting & Plumbing January-December 1912 . ponding to the normal ca-pacity of the tank. This may lead tosome surface ditch or onto land at asufficiently low level. It is merely pro-vided to guard against negligence of theman in charge of the plant. The attend-ant is instructed to empty the tanktwice each day. The same collectingtank can also be used if a bricking fil-ter or contact beds are used. In amajority of cases owing to the rockyformation of the country, land treat-ment is not feasible, and therefore thefinal purification must be accomplishedpreferably by contact filter beds. Using contact beds, two must be pro-vided to purify the daily amount ofsewage. These are shown in Fig. 3. Theliquid or net capacity of each bed is3,000 gallons, or equal to one-_quarter the daily volume of two beds occupy an area of about28 square feet. Each bed isfilled to an average depth of 4feet, with broken stones of IV2 to2 inch size. The bottom of the bedis suitably drained by means of 6-inchhorseshoe drain tiles with 4-inch. Fig 2.—Liquid Sewage Tank. 19
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectplumbin, bookyear1912
