Info

Depth of tank, H = = 2.94 m. Add freeboard of 0.3 m

Actual depth of tank = 2.94 + 0.3 = 3.24, say 3.3 m

Volume of tank = LWH = 20(106.46)(2.94) = 6259.8 m3 ^ 6210 m3

Let there be 10 tanks; thus, width per tank = 10.65 m, say 10 m Dimension for each tank: length = 20 m, width = 10 m, depth = 3.3 m Ans

Actual detention time = 20(10)(2.94)/((0.69/10)(60)(60)) = 2.37 h. Note that the freeboard of 0.3 m does not hold water; thus, 2.94 m is used in the calculation.

Now, determine the amount of recirculation required at minimum flow.

V = 20(10)(2.94) = 588 m3, for one tank Q = 0.3(20,000) = 3,

Therefore,

Qr = (2.37)(60)(60) = °.°62 m /s AnS Example 5.11 Repeat the previous example for a circular settling basin.

Solution:

Considering overflow rate,

Overflow area of tank, = ^ = 2129.14 D = 52.07 m, too large

Use two tanks, therefore —7- = ——1— D = 36.82 m, too large

How To Bolster Your Immune System

How To Bolster Your Immune System

All Natural Immune Boosters Proven To Fight Infection, Disease And More. Discover A Natural, Safe Effective Way To Boost Your Immune System Using Ingredients From Your Kitchen Cupboard. The only common sense, no holds barred guide to hit the market today no gimmicks, no pills, just old fashioned common sense remedies to cure colds, influenza, viral infections and more.

Get My Free Audio Book


Post a comment