Difference Between Flocculated and Deflocculated Suspension

1. What is the difference between Flocculated and Deflocculated suspension?
2. What are the features of flocculated suspension?
3. Why is flocculation necessary for suspension?
4. How Flocculated suspensions are formulated?
5. What is the meaning of Flocculated?
6. How can you prevent suspension from sedimentation?
7. What suspension means?
8. How does a flocculant work?
9. What properties should a well formulated suspension possess?
10. How can flocculation be prevented?
11. Where is flocculation used?
12. How can we avoid floc shearing?

What is the difference between Flocculated and Deflocculated suspension?

There are suspensions that can be either flocculated or deflocculated. The main difference between flocculated and deflocculated suspension is that the rate of sedimentation in a flocculated suspension is rapid whereas the rate of sedimentation in a deflocculated suspension is slow.

What are the features of flocculated suspension?

In flocculated suspension the loose structure of the rapidly sedimenting flocs tends to preserve in the sediment, which contains an appreciable amount of entrapped liquid. The volume of final sediment is thus relatively large and is easily redispersed by agitation.

Why is flocculation necessary for suspension?

Why is flocculation necessary for suspension? The principal use of flocculating agents is to aid in making solid–liquid separations. ... Removing small amounts of suspended inorganic or organic particles from surface water prior to its use as drinking water or industrial process water.

How Flocculated suspensions are formulated?

Formulation of Suspension General Procedure • First the particle size is reduced to a desired size with the help of mill or other equipments. The insoluble materials are levigated or grinded to a smooth paste with a vehicle containing the wetting agent. ... Then a deflocculated suspension is obtained.

What is the meaning of Flocculated?

Flocculation, in the field of chemistry, is a process by which colloidal particles come out of suspension to sediment under the form of floc or flake, either spontaneously or due to the addition of a clarifying agent.

How can you prevent suspension from sedimentation?

Slow down sedimentation by increasing viscosity of continuous phase. Velocity increases with the square of particle size making this the most critical parameter. For concentrated systems a crowding factor must be introduced which incorporates the phase volume Φ.

What suspension means?

A suspension is a heterogeneous mixture of a finely distributed solid in a liquid. The solid is not dissolved in the liquid, as is the case with a mixture of salt and water.

How does a flocculant work?

A flocculant is a chemical that can be added to the water to help colloids and any other suspended solids bind together and form heavier particles. The heavier particles then settle to the bottom of the container/tank and the water on the top is drained off.

What properties should a well formulated suspension possess?

A good suspension should have well developed thixotropy. At rest the solution is sufficient viscous to prevent sedimentation and thus aggregation or caking of the particles. When agitation is applied the viscosity is reduced and provide good flow characteristic from the mouth of bottle.

How can flocculation be prevented?

When particles of a suspension come close together they can form aggregates called flocculates which will settle more rapidly. To prevent that we often coat the particle with a charged surfactant. The charge (Zeta potential) acts to keep the particles separate and prevent flocculation.

Where is flocculation used?

A process wherein colloids come out of suspension in the form of floc, either spontaneously or due to the addition of a clarifying agent. It is used in applications like water purification, sewage treatment, cheese production and brewing, for example.

How can we avoid floc shearing?

To prevent floc from tearing apart or shearing, the mixing velocity and energy are usually tapered off as the size of floc increases. Once flocs are torn apart, it is difficult to get them to reform to their optimum size and strength.