Environmental Question, Civil Engineering

Assignment Help:
An activated sludge tank treats 1 MGD from the primary clarify and has an X of
2200 ppm SS. The water euent is 0.9 MGD. 1.0 MGD of the sludge is recycled back into the tank
and has an [SS] of 3980 ppm. The concentration of the BOD exiting the primary clarier is 200
ppm.
(a) What are Qw and Xw?
(b) What are Qc and Xc?
(c) What are Q1 and X1?
(d) What is Xe? (Answer = 24.4 ppm)
(e) Calculate the volume of the tank that will satisfy the following requirements:
(e-1) BOD loading < 35 lb BOD/1000 ft3day
(e-2) Sludge age > 5 days
(e-3) Aeration period > 4 hr

Related Discussions:- Environmental Question

Explain rcra and hswa - hazardous waste regulations, Explain RCRA and HSWA ...

Explain RCRA and HSWA - Hazardous Waste Regulations 1. In 1976, Congress passed the Resource Conservation and Recovery Act (RCRA) and directed EPA to establish hazardous waste

Types of loads and resulting stresses, • Applied loads result in internal f...

• Applied loads result in internal forces consisting of a shear force (from the shear stress distribution) and a bending moment (from the normal stress distribution) • Bending s

Explain about best hydraulic section, Q. Explain about Best hydraulic secti...

Q. Explain about Best hydraulic section? The best hydraulic section of an open channel is considered by provision of maximum discharge with a given cross sectional area. Chann

Differences between epoxy grout and cement grout, Differences between epoxy...

Differences between epoxy grout, cement grout and cement mortar? Epoxy grout comprises epoxy resin, epoxy hardener and aggregates/sand.As a matter of fact, there are various ty

Explain dielectric breakdown, Explain Dielectric breakdown Dielectric ...

Explain Dielectric breakdown Dielectric breakdown means failure or deterioration of the dielectric material because of various reasons.

Optimum moisture content to grab maximum density, Question For compacti...

Question For compaction of free-draining sands or gravels, what is optimum moisture content to grab maximum density ? Answer Compaction curve of dirty materials is com

Designing of retaining walls, Question What is function of shear keys in d...

Question What is function of shear keys in designing of retaining walls ? Answer In formative external constancy of retaining walls, failure modes similar to bearing failure, s

What will be the increase in horizontal thrust, A 9 metre high retaining wa...

A 9 metre high retaining wall retains a soil with the following properties: φ = 36°; γ = 18 kN/m 3 . What will be the enhance in horizontal thrust if the soil slopes up from the

Determine about the post-tensioned concrete, Determine about the post-tensi...

Determine about the post-tensioned concrete The transfer stage may take place after a long time from the casting of concrete, in the case of post-tensioned,members, enabling th

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