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gladerider

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the concentration into the reactor Cin = 2mg/L with f-in at 20 m^3/hr

the concentration in the reactor is C1

C3 is the concentration in the bio-film

flicks law of diffusion:

e*dc/dt = d*(d^2C/Dz^2) - R where c = C3

where e, d, and R are constants.

e-porosity

d - diffusion coefficient

with bc's ;

dC3/dz = 0 @ z = 2micrometers

C3 = C1(.005mg/l) @ z = 0

I've was trying to solve with separation of variables but I'm rusty and running into some problems... Please help!