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Successful treatment of dairy waste by aeration



Successful treatment of dairy waste by aeration



Sewage And Indust Wastes 24(10): 1271-1277



The treatment of dairy waste by aeration has been successful over a period of several years. On the basis of results reported, it was concluded that B.O.D. reductions approaching 97% can be obtained with the use of 0.6 c.f.m. of air/lb. of B.O.D. As a general design basis, 1.0 c.f.m./lb. of B.O.D. should be used and the aeration tank should have a detention period of 10 hrs. based on the flow during the normal 10-hr. operating period or 21-hr. detention based on a 24-hr. flow period. The final settling tank should have a minimum detention period of 2 hrs. at peak flows and the sludge should be continuously returned to the aeration tank with only occasional wasting of excess sludge. The re-circulation of mixed liquor through a jet-type aerator has proved to be a definite advantage and is possibly the explanation for the satisfactory treatment being obtained with low air consumption.

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Accession: 025608748

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DOI: 10.2307/25032003


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