Customer Challenge: A specialty chemicals plant in Castanea, Pennsylvania manufactures a wide-range of chemicals, including: ? Dye intermediates ? Phenol derivatives ? Aniline ? Chlorobenzene ? Nitrobenzene ? Nitriles ? Aromatic amines Due to the batch nature of the production of these chemicals, the wastewater generated by the plant varies considerably not only in the biological oxygen demand (BOD) strength of the wastewater, but also in the

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