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Estimate the percent of suspended sediments

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Reference no: EM131867503

Question:

A wastewater was tested in a settling column test with the following results in terms of suspended sediment concentration:

At t = 30 minutes

Depth below
surface, h
(cm)

Concentration
remaining,
c./co
38

0.23
118

0.81
198

0.94
278

0.97
358

0.98

At t = 60 minutes

Depth below
surface, h
(cm)

Concentration
remaining,
c/co
34

0.05
114 0.46
194

0.73
274

0.86
354

0.92

At t = 90 minutes

Depth below
surface, h
(cm)

Concentration
remaining,
c/co
32

0.03
112

0.23
192

0.52
272

0.70
352

0.83

a. What type of settling is indicated by these data?

b. This particular wastewater is proposed to be treated in a rectangular sedimentation tank having a detention time of 2 hours and a depth of 4 meters. Estimate the percent of suspended sediments that will be removed.

c. If the wastewater flow rate is 7,500 m3/day, what needs to be the area and volume of the sedimentation tank?

Reference no: EM131867503

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