2. Dioxins are the most hazardous chemicals treated at the Michiana Environ wher

Question

2. Dioxins are the most hazardous chemicals treated at the Michiana Environ where small quantities arrive regularly from several clients. Prior to treatment, the small quantities of dioxin are stored in a 1,000 L carboy. As the operator of the dioxin treatment process, you are responsible for determining the concentration of dioxins at the start of the process so you can determine how long treatment must occur. Currently, four clients send dioxin contaminated wastes to your facility with different concentrations and flowrates (shown below) D Determine how frequently the 1,000 L carboy will be filled with dioxin laced wastes, making mental Services facility, sure the tank does not overfill. ? O use a mass balance to estimate the concentration of dioxins (ug/L) in the tank when it is filled. Provide a well labeled diagram, equations, and units. Waste Frequency Waste Dioxin Concentration JimmyJoBob Auto5 L every week Johnny Chemical 45 L every 3 days Jordan Oil Recycling 100 L every 5 days Justin Time Electric 63 L every week 100 ?/L 45 ?g/L 75 ?g/L 350 ug/L

Explanation / Answer

Given : Capacity of carboy tank = 1000 litre

Now ,

1 - Jimmy Jo Bob Auto send 5 L waste in a week ,? waste send per day will be = 5/7=0.714l

Simarly for others

Johny Chemical = 45/3= 15L

Jordan oil Recycling = 100/5 = 20L

Justin Time Electric= 63/7 = 9L

? total waste obtained will be = 0.714+15+20+9=44.714L/d (per day)

Now days required to fill carboy will be = 1000L/(44.714L/d )=22.36days

i.e. frequency to fill carboy will be on 23rd day.

2- Concentration of dioxins when tank is filled is obtained by sum of product of waste genetrated and concentration of dioxin .

now tank is filled in 22.36days.(Ans)

The contribution waste send in 22.36 days are;

Jimmy jo Bob Auto = 0.714L*22.36= 15.98L

Johny Chemical = 15L*22.36=335.4L

Jordan oil Recycling = 20L*22.36=447.2L

Justin Time Electric= 9L*22.36=201.24L

`Now concentration of dioxin when tank is filled will be give as;

Jimmy jo Bob Auto = 15.98L*100?g/L=1598?g

Johny Chemical = 335.4L*45?g/L=15093?g

Jordan oil Recycling = 447.2L*75?g/L=33540?g

Justin Time Electric= 201.24L*350?g/L=70434?g

Total = 1598+15093+33540+70434= 120665 ?g (ans)

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