| Description |
iv, 73 leaves : illustrations, photographs ; 29 cm |
| Summary |
"The effect of the mixed liquor suspended solids concentration on the treatment of dairy wastes by the activated sludge process was investigated to provide original and basic information of value to the waste water treatment field. The studies were conducted using a continuous flow activated sludge laboratory unit. Two different synthetic dairy waste systems were used in this investigation, the 0.05 Percent Skim Milk Waste System and the 0.1 Percent Skim Milk Waste System. These wastes provided BOD loadings of 43.9 and 91.1 lb. BOD per day per 1000 cu. ft., respectively, at the 12 hour detention period employed. Mixed liquor suspended solids concentrations in the range of 500 to 3000 mg/l were studied. The chemical oxygen demand and suspended solids determinations were the primary parameters used in these studies, but additional in- formation was obtained using the biochemical oxygen demand, sludge volume index and pH determinations. It was found that the mixed liquor suspended solids significantly affected the treatment of the dairy wastes by the activated sludge process, especially under conditions of plant overloading. The treatment efficiency increased and the operation improved when the higher suspended solids concentrations were employed"--Abstract. |
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