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Modeling WAS Reduction: Incorporating Ultrasonic Pretreatment Into a Whole-Plant Simulator

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There has been a recent surge in interest into pretreatment of sludges, to reduce quantity and improve quality, but predicting the effects of these processes remains difficult. Research is presented which will allow for the incorporation of ultrasonic pretreatment into a whole-plant model. Conventional and respirometric analyses were utilized to determine conversions of waste sludge generated from municipal wastewater, over a range of ultrasound doses. Inactivation of heterotrophs by ultrasound is demonstrated to be first order with respect to heterotrophs. Other conversion processes fit well with the same conversion dose constant, and convertible fractions are presented. The approach is shown to be valid over the typical range of SRT conditions.
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Keywords: Pretreatment; modeling; sludge reduction; ultrasound

Document Type: Research Article

Publication date: 2009-01-01

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