What is activated sludge process, Civil Engineering

Assignment Help:

Q. What is Activated Sludge process?

The term Activated Sludge is used to indicate the sludge which is obtained by settling sewage in presence of abundant oxygen. The Activated Sludge is biologically active and it contains a large number of aerobic bacteria and other micro organisms which have got an unusual property to oxidise organic matter.

Activated Sludge is mixed with raw or partially treated sewage. When Activated Sludge is mixed properly with sewage containing ample or sufficient quantity of oxygen, micro organisms present in Activated Sludge multiply rapidly as result of this.

a) Organic solids present in sewage are rapidly oxidised.

b) Suspended and colloidal matters coagulate and they from a readily settleable precipitate.

After such precipitate settles down the effluent which is obtained is clear and sparking. The effluent contains very low amount of organic matter. A portion of settled sludge is sent for recirculation and the remaining part is sent to sludge digestion tanks. The digested sludge is harmless.


Related Discussions:- What is activated sludge process

Process of installation of elastomeric bearing, The process of installation...

The process of installation of elastomeric bearing differs in case of precast vis-a-vis cast-in-situ girders. For precast girders, the bearing may be fixed to the underside of the

Define limitations of radiography - inspection of bridge, Define Limitation...

Define Limitations of Radiography - Underwater Inspection of Bridge? i. Radiography is a costly and time consuming method, which re- quires extensive safety measures to be adop

Levelling, principle of direct levelling

principle of direct levelling

Transportatoin engineening, explain the construction while aligning roads o...

explain the construction while aligning roads on hilly areas

Civil Engineering, I. A horizontal 500 lb force acts at a point D of cranks...

I. A horizontal 500 lb force acts at a point D of crankshaft AB which is held in static equilibrium by a twisting couple and by reactions at A and B. Knowing that the bearings are

Maximum shear stress - state of stress, Maximum shear stress - state of str...

Maximum shear stress - state of stress: Consider the state of stress. (a) According to principal stress theory the equivalent stress for this case is simply σ 1 , i.e. 300

How to find back bearings?, Example: The following fore bearings were ...

Example: The following fore bearings were observed respectively for lines, AB, BC, CD, DE, EF and FG. Find out their back bearings: (i) 148°                          (ii

Distance between concrete columns in 5 story building, distance between con...

distance between concrete columns in 5 story building and if there is distance 15 feet than what should be the column size and how many bars and diameter of each bar ?

#title., Ask question #Minimum 100 words accepted2812539076# you

Ask question #Minimum 100 words accepted2812539076# you

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