In Florida, advanced wastewater treatment standards require that treated effluen

Question

In Florida, advanced wastewater treatment standards require that treated effluent have no more than 5 ppm BOD_5, 5 ppm TSS, 3 ppm total nitrogen (TN), and 1 ppm total phosphorus (TP), (a) What is the wastewater standard for TN and TP in mg/L? (b) If all of the nitrogen is transformed to nitrate during the advanced treatment, what is the effluent limit of nitrate in mg/L? (c) If your laboratory had obtained and processed 200 mL sample of treated wastewater for the TSS test, how many mg of suspended solids were captured on the filter for this sample?

Explanation / Answer

having into account ppm = mgA/L

then

A)

B) Nitrate-NO3 (mg/L) = 4.4268 x Nitrate-N (mg/L)

Nitrate-NO3(mg/L) = 13.2804mg/L NO3

C) (dry weight of residue and filter - dry weight of filter alone, in grams)/ mL of sample * 1,000,000 = TSS(mg/L)

then (dry weight of residue and filter - dry weight of filter alone, in grams) = 1g

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