Treatment plant - sewer construction, Civil Engineering

Assignment Help:

Treatment plant - sewer construction:

Problem:

How many kg of primary and secondary dry solids needs to be processed daily from the treatment plant?

Solution

An amount of solids processed from the basic sedimentation tanks equals the variance in suspended solids concentrations measured across the sedimentation tanks multiplied by the plant flow rate. Thus,

33.75 × 106 l/day (200 mg SS/l - 100 mg SS/l) × kg/1,000,000 mg = 3375 kg primary solids per day.

We are not provided with the concentration difference of suspended solids across the secondary sedimentation tanks so we can determine the amount of secondary solids produced daily in the same manner that we used for primary solids. Therefore, careful examination of the expression of solids retention time displays in which the term Qw Xw could be estimated as the following:

4 days = V =X/Qw×Xw = 5,000,000 l (4,300 mg SS/l)/Qw × Xw

Solve for Qw Xw which equals 5375 kg or say 5400 kg secondary dry solids per day.


Related Discussions:- Treatment plant - sewer construction

Sealing moving cracks and non-moving cracks, Sealing moving cracks and non-...

Sealing moving cracks and non-moving cracks In developing a suitable method to seal up cracks detected on concrete surface, it's of paramount importance to conclude if further

3-d stress, If the resultant forces are resolved in the three co-ordinate d...

If the resultant forces are resolved in the three co-ordinate directions and divided by the area of the face of the cube we have the general state of 3-dimensional stress as shown.

Rail tensors, A hydro stressor consists essentially of a hydraulic pump whi...

A hydro stressor consists essentially of a hydraulic pump which transmits its force through connecting vans to clamps which grips the rail. In case of mechanical tensor the force i

Cross section diagram of urban road, cross section diagram of urban roan in...

cross section diagram of urban roan in embankment,in cut,in eight lane,in conjusted area,divided hihgway

Moment of force on shoulders, During weight training,an athlete pulls a wei...

During weight training,an athlete pulls a weight of 500 N with his arms pulling on a handlebar connected to a universal machine by a cable.Find the moment of the force about the sh

Keywords of road pavements, Keywords of Road Pavements: Pavement : T...

Keywords of Road Pavements: Pavement : That part of a road which structurally supports the vehicles travelling on a road. Flexible Pavement   : A layered system of pave

What is codal provisions, According to National Building Code (Sp:7 1970), ...

According to National Building Code (Sp:7 1970), the differential settlement shall be kept within the limits to which the superstructure can accommodate itself without harmful dist

Varignon theorem, how to prove varignon theorem in easiest way

how to prove varignon theorem in easiest way

Define recommendations for confined elastomeric pad, Define Recommendations...

Define Recommendations for confined elastomeric pad?  (a) Permissible limits for confined pressure on elastomer pad depends upon effectiveness of internal seal preventing it fr

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