Calculate surface loading rate for each clarifier, Civil Engineering

Assignment Help:

A wastewater plant is operating at 10MGD with a suspended solids concentration of 200mg/L. It has 6 clarifiers operating in parallel. Each clarifier is 40 foot in diameter and 10 feet deep.  

(a)  How many gallons flow to each clarifier?

     10 MGD/6= 1.67 MGD  

(b)  How many pounds of solids flow to each clarifier?

      Total Solids (lbs) = (MG)(8.34)(mg/L)  = (10)(8.34)(200)= 16,680 lbs

Solids per each clarifier = 16,680 lb/6 clar = 2,780 lb/clar

Or can calculate directly for one clarifier by substituting 1.67 MGD instead of 10  

(c) If the clarifier are 40% efficient in removing the solids. How many pounds of solids are produced per clarifier?

(0.4)(2,780) = 1,112lbs

(d)  How many total pounds of waste are removed by all 6 clarifiers?

 (6)(1,112) = 6,672 lbs  

(e) What is the suspended solids concentration of the wastewater leaving the clarifier?

40% of 200 mg/l solids are removed in the clarifier so concentration of solids left = 0.6*200 = 120 mg/l

 (f) What is the area of each clarifier?

Each Clarifier Area (A) = π (D2)/4  = (0.785)(402)   = 1,256 ft2

(g) What is the surface loading rate (gpd/ft2) for each clarifier?

     (1,670,000 gpd)/ (1,256 ft2) = 1,329 gpd/ ft2

(h) What is the clarifier perimeter?

P = πD = (3.14) (40) = 126 ft  

(i)  What is the weir loading rate?

1,670,000 gpd) / (126 ft) = 13,254 gpd/ft  

(j)  What is the detention time?

Volume of clarifier = (0.785)(402)(10) = 12,560 ft3   

(12,560 ft3* 7.4805 gal/ft3   = 93,955 gal

 Detention time = V/Q = 93955 gal/1,670,000 gal/day * 24 hr/day = 1.35 hrs


Related Discussions:- Calculate surface loading rate for each clarifier

Trigonometry, #question a pilot entering a bay on course 60.3 degrees at sp...

#question a pilot entering a bay on course 60.3 degrees at speed 12 miles per hour sees a light bearing 37.3 true and 20 minutes later he sees it bearing 20.0 degrees true. if he k

Surveying, Explain about reciprocal ranging

Explain about reciprocal ranging

Computer programming, compare 2 numbers and print either the message identi...

compare 2 numbers and print either the message identifying the greater than number(or) the message starting that both number are equal

How are freeway bridges built, After measuring the anticipated traffic for ...

After measuring the anticipated traffic for the bridge, cement/reinforced- with- rebar stanchions are spaced over the freeway to accommodate the bridge. An 'off-ramp' from the free

Fore bearing, find out the interior angleS with diagrame LINE AB, BC, CD, D...

find out the interior angleS with diagrame LINE AB, BC, CD, DE, EA Fore bearing 60''30" , 122'' , 46'' , 205''30" , 300''

Theory of structures, haw do you salve a supple supported beam with a sprin...

haw do you salve a supple supported beam with a spring balance

Frames, how to analyse a frame

how to analyse a frame

Plant location and facility layout, Plant Location and Facility Layout: ...

Plant Location and Facility Layout: This unit explain the general definition of Plant location and facility layout. Several factors affecting the location decision of a firm o

Find the size of the foundation required, A steam turbine with base 6 m × 3...

A steam turbine with base 6 m × 3.6 m weighs 10,000 kN. It is to be placed on a clay soil with c = 135 kN/m 2 . Find the size of the foundation needed if the factor of safety is to

Road location in dune areas, Road Location in Dune Areas: The followi...

Road Location in Dune Areas: The following principle should be observed in locating a road in dune areas : (a) Align a road where sand is covered by vegetation. (b) Sel

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd