Sedimentation, Biology

Assignment Help:

1619_sedimentation.png

Simple sedimentation:

The process of removal of suspended, colloidal impurities by allowing water to stand undisturbed in big tanks about 5m deep. Most of the suspended particles settle down at the bottom, due to the force of gravity. The retention period in a sedimentation tank ranges from 2-6 hours.

Sedimentation with coagulation:

Fine suspended particles like mud etc. cannot settle down by plain sedimentation. They are removed by this process in which we add coagulant to water. The coagulant forms an insoluble gelatinous, flocculent precipitate, which traps very fine suspended impurities forming bigger flocks, which further settle down.

Some of the examples of coagulants are alum, ferrous sulphate (FeSO47H2O), sodium aluminate etc.

General reactions during coagulation are:

 

                 AI2(SO4)3+Ca(HCO3)2  1223_food chain.png   2AI(OH)3+3CaSO4+6C02  

                 Coagulant

                 NaAIO2  +  2H21223_food chain.png  AI(OH)3+NaOH (pH =  5.5-8.0)

                  NaOH  +  MgSO4 1223_food chain.png   Mg(OH)2   +  Na2SO4


Related Discussions:- Sedimentation

Hypothetical age pyramids, Hypothetical Age Pyramids The three types o...

Hypothetical Age Pyramids The three types of hypothetical age pyramids which are as follows: 1) A pyramid with a broad base, indicating a high percentage of young individua

What is the significance of magnesium for plants, What is the significance ...

What is the significance of magnesium for plants? What are the other main biological functions of magnesium? Magnesium is fundamentally significant for plants because it is par

What is cyclosis, Cyclosis is a type of internal cell movement in which an ...

Cyclosis is a type of internal cell movement in which an oriented flow of circulating material is formed and maintained in the cytoplasm by the action of microfilaments. Cyclosis i

Coagulation - blood collection , Coagulation - Blood Collection : Plasm...

Coagulation - Blood Collection : Plasma is used to minimize the time needed for coagulation so it is used is medical emergencies. There are many types of anticoagulants used

Would induction of CYP 2E1 raise your blood alcohol level?, If I take a dru...

If I take a drug that induced the synthesis of CYP 2E1 in my system, would that raise or lower my blood alcohol level after I drink a beer or wine (compared to if I hadn''t taken t

Hazardous material - factors affecting occupational health, Hazardous Mater...

Hazardous Material - Factors Affecting Occupational Health Handling and storage of flammable and combustible liquids all the time pose threat to occupational safety. Fire and

Explain carrageenan, Carrageenan Carrageenan is a collective term for p...

Carrageenan Carrageenan is a collective term for polysaccharides prepared by alkaline extraction (and modification) from red seaweed (Rhodophycae). Carrageenan is a sulfated ga

Explain in brief about life style modification, Explain in brief about Life...

Explain in brief about Life style modification Life style modification in simpler words, means  diet control and doing exercises. Diet control and exercise should be planned on

Determine the recombination frequency of genes, Why does the recombination ...

Why does the recombination frequency of genes vary with the distance between them in the chromosome? The farther the distance among the loci of two genes in a chromosome the h

Transmission electron microscopy, Transmission Electron Microscopy The so...

Transmission Electron Microscopy The source of illumination in a TEM is a tungsten filament that emits electrons. A vacuum is created to prevent the collision of electrons with a

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