The Algona Upper Des Moines from Algona, Iowa on August 18, 1955 · Page 19
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The Algona Upper Des Moines from Algona, Iowa · Page 19

Algona, Iowa
Issue Date:
Thursday, August 18, 1955
Page 19
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%ffi '&£#^^ nother Step Forward For '"Illll'llillOilllllllir THE SCREEN HOUSE. The sewage pipe lines from the north and south sections of town hieet in the pit at the left of the screen house and are immediately carried into the building. In the screen house, large particles, sticks, cans, etc., are removed and ground up. Then they are returned to the moving sewage. The pit to the right of the screen house is the detriter, into which the sewage next flows. invited to inspect The New Algona * •*• * *•*•*• THE DETRITER PIT. Above is a close-up shot of the detriler pit, which is a grit removing chamber. Here sweeping tread wheels keep the organic material in suspension, sweeping the grit into a grit -chamber after it settles to the bottom. The sewage is next carried into the wet pit located in the administration building. 1:00 to 5:00 P. M. * * * 21 * * * THE ADMINISTRATION BUILDING. The left front section of the administration building, shown above, contains the office of plant operator, including various equip* men! for running the numerous tests that must be made for the satisfaction of the State Department of Health. In back of the building is the wet pit, where sewage flow is measured and recorded for every minute of the day. As consulting engineers for the new Algona Sewage Treatment Plant, we are most happy to publish, over our signature, this invitation to Algona citizens to visit their new plant on Sunday, August 21. This is an installation Buell & Winter is thoroughly proud of, and we are certain the residents of Algona, once •*•«•—*»«**-«*•-*. v,. . ...... . . ... . ,. .. f. they have inspected it, will share that pride. This plant incieases greatly the health standards of your community, and through its great efficiency of operation, will over a course of time prove to be o a notable asset to Algona. Our firm enjoyed greatly the pleasant relations which were present in working with Algona city officials, and it was a distinct pleasure for us to turn this plant over to the city as an installation that is one of the very finest in its field. Again, we urge you, as citizens, to visit and view your new Sewage Treatment Plant on the occasion of the public inspection, Sunday, August 21. Igona .-**.. THE FILTER BED. Three pumps force the sewage up to the clariflocculator tank, where solids and floating objects are removed, and then the sewage enters the filter bed pictured above. The filter bed is a gigantic circular rock bed 9 feel deep and 123 feel in diameter, which contains quartzile rock. Green algae, living on these rocks, is the home of arobic bacteria, who go to work on the waste materials. An eye-dropper of scum on these rocks contains over 15 million of these bacteria. THE SECONDARY CLARIFIER. The sewage now passes into the secondary clarifier, pictured above. If any solids remain, they settle here and are dumped into the digester. Millions of anarobic Mesaphalic bacteria, which do not need oxygen, finish off the remaining organic material. The sewage water, now treated to over 90°o efficiency, is pumped into the river. THE SLUDGE BEDS. The organic waste material given off by the activity of the bacteria in the digester settles to the bottom of the building to be pumped out about once a year. This material is then placed on one of the sludge beds above to dry. The material is very high in nitrogen content, and thus may be sold as fertilizer. BUELL & WINTER CONSULTING ENGINEERS SEWERS SIWAGE DISPOSAL ELECTRIC SYSTEMS PAVEMENTS SWIMMING POOLS WATER WORKS SIOUX CiTY, IOWA

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