Table of Contents
Flocculation is a process whereby small particles in suspension are caused to aggregate, giving large clusters (flocs) that are much more easily separated than the original particles. The process is in widespread use in many industrial applications.
What do mean by flocculation?
Flocculation is a process in chemistry wherein colloids are extracted from suspensions which then take the form of flake or floc. Flocculation is used for water purification, and can even be used to extract certain corrosive elements from water. Flocculation is also known as coagulation and agglomeration.
What is flocculation Mcq?
Flocculation is basically slow mixing or agitation process in which destabilized colloidal particles are brought into intimate contact in order to promote agglomeration. The ratio of flocculation depends on. Turbidity.
What is flocculation simple?
Flocculation, in physical chemistry, separation of solid particles from a liquid to form loose aggregations or soft flakes. These flocculates are easily disrupted, being held together only by a force analogous to the surface tension of a liquid.
What do you mean by flocs?
Floc is a small, loosely aggregated mass of flocculent material suspended in or precipitated from a liquid. Flocs are formed from a combination of suspended materials in the raw water together with adsorbed and precipitated solids gained via coagulation.
What is flocculant for?
Flocculant refers to the chemical or substance added to a suspension to accelerate the rate of flocculation or to strengthen the flocs formed during flocculation.
Why is flocculation important?
Applying flocculation ensures a high flux over filtration units as well as efficient and cost effective separation of cell material from supernatant. Used water can contain significant amounts of suspended particulate matter, which often takes long to sediment.
What two chemicals are commonly used as water coagulants?
Aluminum sulfate (alum) is the most common coagulant used for water purification. Other chemicals, such as ferric sulfate or sodium aluminate, may also be used.
What is the other name of Deflocculation Mcq?
2. What is the other name for deflocculation? Explanation: Deflocculation is the exact opposite of flocculation, also sometimes known as peptisation. Usually in higher pH ranges in addition to low ionic strength of solutions and domination of monovalent metal cations the colloidal particles can be dispersed.
Which gas is released when alum is added to water?
Explanation: Carbon dioxide gas is released when alum is added to water, which is corrosive to metals.
What is an example of flocculation?
Flocculation and coagulation treatment chemicals are used in effluent wastewater water treatment processes for solids removal, water clarification, lime softening, sludge thickening, and solids dewatering. Examples of ChemTreat coagulation products include aluminum salts, iron salts, and polyelectrolytes.
What is difference between flocculation and coagulation?
Coagulation: Particles that aggregate with themselves e.g. by the influence of a change in pH. Flocculation: Particles that aggregate by the use of polymers that binds them together. Coagulation and flocculation are well-known techniques within wastewater treatment.
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 does flocking mean in slang?
If someone answers, the burglar pretends that he or she is looking for someone, or is lost, and has merely knocked on the wrong door. Apr 13, 2017.
Are flocs aerobic or anaerobic?
Activated sludge flocs are known to deflocculate under short-term anaerobic conditions, but little is known about possible reflocculation under subsequent aerobic conditions.
What is a clumped?
(Entry 1 of 2) 1 : a group of things clustered together a clump of bushes. 2 : a compact mass.
Can you add too much flocculant?
Too much floc can detract from the beauty of your pool. Flocculants are substances that help clear the cloudiness and restore the clarity to your swimming pool water. You can use too much floc, however.
How often can you use flocculant?
You can reuse a clarifier after 5-7 days, but if you’re constantly seeing cloudy water, there may be other problems. Adding too much flocculant can cause its own issues.
Can you drink flocculant?
In addition, coagulants and flocculants are expensive, which is why you want to avoid adding more than are necessary to the water; drinking water treatment plants use “jar tests” to identify the optimal coagulant and flocculant concentrations. Do not drink any of your water samples—even if they appear clear.
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.
Is flocculation good for soil?
In all but the sandiest soils, dispersed clays plug soil pores and impede water infiltration and soil drainage. Flocculation is important because water and oxygen moves mostly in large pores between aggregates moves mostly in large pores between aggregates. Also, plant roots grow mainly between aggregates.
What causes flocculation?
In dispersed clay slurries, flocculation occurs after mechanical agitation ceases and the dispersed clay platelets spontaneously form flocs because of attractions between negative face charges and positive edge charges.
Is FeCl3 a coagulant?
Ferric chloride (FeCl3) is the most common iron salt used to achieve coagulation. Its reactions in the coagulation process are similar to those of alum, but its relative solubility and pH range differ significantly from those of alum. Both alum and ferric chloride can be used to generate inorganic polymeric coagulants.
Is Lime a coagulant?
Lime (Ca(OH)2 or CaO): Lime, or calcium hydroxide, is predominantly used to adjust pH, but as a softener, it can also be used as a coagulant aid. The lime bonds with the other particles and increases the size/weight of the flocs which then increases the speed with which they settle out of the water.
What is coagulant mean?
A coagulant is a compound or agent which is added to a vessel to help thicken something. Adding a coagulant such as aluminum sulfate to water permits particles to come together and results in the formation of a flocculent mass. A coagulant is a compound or agent which is added to a vessel to help thicken something.
What does zero discharge actually refer to?
The principle of “zero discharge” is recycling of all industrial wastewater. This means that wastewater will be treated and used again in the process. Because of the water reuse wastewater will not be released on the sewer system or surface water.
What is GT in Flocculator?
2 Flocculation. Flocculation allows for the destabilized particles to agglomerate into larger particles that can be removed by gravity through sedimentation. The product of the mixing intensity and time (Gt) provides a parameter to quantify the different mixing systems in the coagulation and flocculation processes.
What is the product obtained when a coagulant is mixed with wastewater?
7. What is the product obtained when a coagulant is mixed with wastewater? Explanation: The most commonly used coagulant is alum. A coagulant combines with the impurities in wastewater and forms an end product called as flocs which is greater in diameter and can be easily removed.
What do mean by flocculation?
Flocculation is a process in chemistry wherein colloids are extracted from suspensions which then take the form of flake or floc. Flocculation is used for water purification, and can even be used to extract certain corrosive elements from water. Flocculation is also known as coagulation and agglomeration.
What is flocculation Mcq?
Flocculation is basically slow mixing or agitation process in which destabilized colloidal particles are brought into intimate contact in order to promote agglomeration. The ratio of flocculation depends on. Turbidity.
What is flocculation simple?
Flocculation, in physical chemistry, separation of solid particles from a liquid to form loose aggregations or soft flakes. These flocculates are easily disrupted, being held together only by a force analogous to the surface tension of a liquid.
What do you mean by flocs?
Floc is a small, loosely aggregated mass of flocculent material suspended in or precipitated from a liquid. Flocs are formed from a combination of suspended materials in the raw water together with adsorbed and precipitated solids gained via coagulation.
What is flocculant for?
Flocculant refers to the chemical or substance added to a suspension to accelerate the rate of flocculation or to strengthen the flocs formed during flocculation.
Why is flocculation important?
Applying flocculation ensures a high flux over filtration units as well as efficient and cost effective separation of cell material from supernatant. Used water can contain significant amounts of suspended particulate matter, which often takes long to sediment.
What two chemicals are commonly used as water coagulants?
Aluminum sulfate (alum) is the most common coagulant used for water purification. Other chemicals, such as ferric sulfate or sodium aluminate, may also be used.
What is the other name of Deflocculation Mcq?
2. What is the other name for deflocculation? Explanation: Deflocculation is the exact opposite of flocculation, also sometimes known as peptisation. Usually in higher pH ranges in addition to low ionic strength of solutions and domination of monovalent metal cations the colloidal particles can be dispersed.
Which gas is released when alum is added to water?
Explanation: Carbon dioxide gas is released when alum is added to water, which is corrosive to metals.
What is an example of flocculation?
Flocculation and coagulation treatment chemicals are used in effluent wastewater water treatment processes for solids removal, water clarification, lime softening, sludge thickening, and solids dewatering. Examples of ChemTreat coagulation products include aluminum salts, iron salts, and polyelectrolytes.
What is difference between flocculation and coagulation?
Coagulation: Particles that aggregate with themselves e.g. by the influence of a change in pH. Flocculation: Particles that aggregate by the use of polymers that binds them together. Coagulation and flocculation are well-known techniques within wastewater treatment.
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 does flocking mean in slang?
If someone answers, the burglar pretends that he or she is looking for someone, or is lost, and has merely knocked on the wrong door. Apr 13, 2017.
Are flocs aerobic or anaerobic?
Activated sludge flocs are known to deflocculate under short-term anaerobic conditions, but little is known about possible reflocculation under subsequent aerobic conditions.
What is a clumped?
(Entry 1 of 2) 1 : a group of things clustered together a clump of bushes. 2 : a compact mass.
Can you add too much flocculant?
Too much floc can detract from the beauty of your pool. Flocculants are substances that help clear the cloudiness and restore the clarity to your swimming pool water. You can use too much floc, however.
How often can you use flocculant?
You can reuse a clarifier after 5-7 days, but if you’re constantly seeing cloudy water, there may be other problems. Adding too much flocculant can cause its own issues.
Can you drink flocculant?
In addition, coagulants and flocculants are expensive, which is why you want to avoid adding more than are necessary to the water; drinking water treatment plants use “jar tests” to identify the optimal coagulant and flocculant concentrations. Do not drink any of your water samples—even if they appear clear.
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.
Is flocculation good for soil?
In all but the sandiest soils, dispersed clays plug soil pores and impede water infiltration and soil drainage. Flocculation is important because water and oxygen moves mostly in large pores between aggregates moves mostly in large pores between aggregates. Also, plant roots grow mainly between aggregates.
What causes flocculation?
In dispersed clay slurries, flocculation occurs after mechanical agitation ceases and the dispersed clay platelets spontaneously form flocs because of attractions between negative face charges and positive edge charges.
Is FeCl3 a coagulant?
Ferric chloride (FeCl3) is the most common iron salt used to achieve coagulation. Its reactions in the coagulation process are similar to those of alum, but its relative solubility and pH range differ significantly from those of alum. Both alum and ferric chloride can be used to generate inorganic polymeric coagulants.
Is Lime a coagulant?
Lime (Ca(OH)2 or CaO): Lime, or calcium hydroxide, is predominantly used to adjust pH, but as a softener, it can also be used as a coagulant aid. The lime bonds with the other particles and increases the size/weight of the flocs which then increases the speed with which they settle out of the water.
What is coagulant mean?
A coagulant is a compound or agent which is added to a vessel to help thicken something. Adding a coagulant such as aluminum sulfate to water permits particles to come together and results in the formation of a flocculent mass. A coagulant is a compound or agent which is added to a vessel to help thicken something.
