Identity elements
Reference code
Name and location of repository
Level of description
Item
Title
D57459-7
Date(s)
- 1951-04-04 (Creation)
Extent
Name of creator
Content and structure elements
Scope and content
Progress picture of sewage disposal unit, for Hoagland- Findlay Engineering Co. The plant was designed so that it would take two hours for sewage to reach the lower end of the hundred- yard long series of tanks in which 90 per cent of the solid matter would settle to the bottom. The liquid, or effluent, was treated with chlorine and released into the Puyallup River. The solid matter flowed to digesting tanks where anaerobic bacteria decomposed the the sludge and produced a gas. The plant utilized the gas to heat the sludge to 95 degrees, aiding decomposition, and to heat the buildings. The sludge then went through filters, was peeled on in cakes and sold as an ingredient in commercial fertilizer. (TNT 12/12/1951)
Progress photographs; Building construction--Tacoma--1950-1960; Sewerage--Tacoma; Waste disposal facilities--Tacoma; Hoagland-Findlay Engineering Co. (Seattle);