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Long-Term Study of Peripheral Feed/Peripheral Discharge Secondary Clarifiers.

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Long term study of peripheral feed, peripheral output clarifer was performed at the San Jose/Santa Clara Water Pollution Control Plant. The effect of eleven operational parameters on clarifier performance was analyzed. Results indicated that effluent TSS depends only on two parameters: overflow rate and temperature. An increase of overflow rate deteriorates effluent TSS due to an increase in the number of large heavy particles in the effluent probably caused by short-circuiting. A decrease of temperature increases effluent TSS due to a decrease of settling velocity, and an increase in fraction of non-settleable particles. The best prediction of clarifier failure can be achieved using overflow rate as an individual indicator with a prediction success of 33%. The use several operational parameters increases rate of prediction success up to 70%.
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Document Type: Research Article

Publication date: 2000-01-01

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