June 5, 1913: Sewage Treatment in Fitchburg, MA

0605 Sewage Treatment for Fitchburg MAJune 5, 1913: Engineering News article. Sewage Treatment Works for Fitchburg, Mass. “Sewage-treatment works, consisting of Imhoff tanks, sludge beds, sprinkling filters and secondary or final settling tanks are about to be built for Fitchburg, Mass., under a contract awarded in May, 1913. Special features of this plant are rectangular Imhoff tanks, built side by side with dividing walls, cement-plaster partitions forming troughs and gas vents, and the use of structural-steel frames to support the reinforced-concrete walls of the tanks and also the partitions just mentioned; the installation of the air lift for removing sludge from the Imhoff tanks, the approval by the Massachusetts State Board of Health of sprinkling filters, the first plant of the kind to be thus approved; the construction of sprinkling filters 10ft. in depth; the building of a 2-in. cement plastered curtain wall between the natural ground and the stone filling of the sprinkling filters.”

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