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When Methanol Addition is Cheaper than Free Wastewater for Denitrification

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A systematic evaluation of estimated construction and operation costs shows that the use of methanol at the Smithfield Packing Plant near Tar Heel, NC is a more economical carbon source for denitrification than anaerobic lagoon influent. The capital and O&M cost comparison of the two options shows that the methanol addition results in a yearly savings of 317,750 when compared to the anaerobic by-pass option. This difference is primarily due to:



Lower estimated capital costs due to the High-Strength Equalization Basin required with the by-pass option.


Reduced biogas production in the anaerobic lagoon associated with the by-pass option.


Reduced aeration requirements and solids handling costs associated with the methanol addition.


This evaluation illustrates the importance of all operational considerations when selecting a carbon source for denitrification at an industrial facility.
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Document Type: Research Article

Publication date: 2008-01-01

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