Metrics ): Soap-X was asked by their local wastewater treatment plant to reduce phosphorus discharge to the sewer system. The company identified two main sources of phosphorus from their chemical formulating manufacturing process: a) residue from liquid mixing tanks, and b) pH adjust prior to sewering. See details below for both a and b.
Metrics ): Soap-X was asked by their local wastewater treatment plant to reduce phosphorus discharge to the sewer system. The company identified two main sources of phosphorus from their chemical formulating manufacturing process: a) residue from liquid mixing tanks, and b) pH adjust prior to sewering. See details below for both a and b.
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a) |
Product is formulated in liquid mixers: Tank cleaning generates 3,800 gal/yr of residue with trisodium phosphate (Na3PO4). The company reformulated their product with a no-phosphorus based constituent.
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b) |
pH adjust: 1,900 gal of 80% strength phosphoric acid (H3PO4) was used per year to neutralize caustic wastewater prior to sewering. Because it was a source of phosphorus, the company eliminated the use of H3PO4, and HCl was substituted. |
Density of: Na3PO4 = 13.5 lb/gal
H3PO4 = 14.17 lb/gal
Molecular weights (g/mol): P = 32; H = 1; O = 16; Na = 23
How much total phosphorus will Soap-X be able to tell the wastewater treatment plant that they reduced (lb/yr) as a result of these changes? Show your work!
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