difference between coagulation and flocculation

Coagulation. 3. Flocculation: The process of agglomeration of the destabilized particles to such a size that separation by sedimentation and filtration is possible. In respects to the chemistry of this procedure, adding a coagulant destabilizes the particle’s charges. The polymer will then provide the base for the settling of the particles and eventually it will grow into a floc or flake attracting the particles out of the suspension. Coagulation is the neutralization of the electronic charge on suspended particles. Coagulation means to curdle; it basically refers to a chemical process in which the destabilization of non-settleable particles takes place. Therefore, the large clumps or the large precipitate could be easily separated and removed from the medium. The most common way is to add a flocculant to the suspension, where the flocculant is generally a polymer. For water treatment, coagulation is generally followed by flocculation. Flocculation is gentle stirring or agitation to encourage the particles thus formed to agglomerate into masses large enough to settle or be filtered from solution. Dr.Samanthi Udayangani holds a B.Sc. Flocculation is synonymous with agglomeration and coagulation / coalescence. Flocculation: The process of agglomeration of the destabilized particles to such a size that separation by sedimentation and filtration is possible. Available here Coagulants and Flocculation In the precipitation process, chemical precipitants, coagulants, and flocculantation are used to increase particle size through aggregation. One of the commonest coagulants used is alum (Al2(SO4)3.14H2O). Meanwhile, flocculation is a mixing technique that promotes agglomeration and assists in the settling of particles. Coagulation involves the use of a coagulant which has the potential to de-stabilize the previously stabilized charged particles in the suspension. Coagulation means to curdle; it basically refers to a chemical process in which the destabilization of non-settleable particles takes place. In an international report published in 1998, it was found that coagulation and sedimentation can only remove between 27 and 84 percent of viruses and between … After coagulation the destabilized particles can collide, aggregate so flocs can be formed. Coagulation is a process used to neutralise charges and form a gelatinous mass to trap (or bridge) particles thus forming a mass large enough to settle or be trapped in the filter. These particles form clumps with the help of a coagulant. Difference Between Coagulation and Flocculation in Water Treatment www.differencebetween.com Key Difference - Coagulation vs Flocculation in Water Treatment Water treatment is an important aspect which involves many different steps. This is achieved by adding a coagulant that possesses an opposite charge to that of the suspended solids. Coagulation is the neutralization of the electronic charge on suspended particles. Particles in water, such as clay, usually have a negative charge. In contrast, in flocculation, the de-stabilization is brought about by physical techniques such as mixing of the solution, and also sometimes by the addition of polymers. Please download PDF version here Difference Between Coagulation and Flocculation in Water Treatment, 1.“Flocculants & Coagulants.” ChemTreat. What is Coagulation in Water Treatment The process of aggregation of many small particles into a few large ones. Particles in water, such as clay, usually have a negative charge. If coagulation is incomplete, flocculation step will be unsuccessful, and if flocculation is incomplete, sedimentation will be unsuccessful… Flocculant such as an organic polymer that involves in bridging and strengthening the flocs is added. Coagulation, flocculation and agglutination are terms that usually cause confusion. Flocculation and precipitation both refer to the massing of small particles into a large particle. Coagulation is a chemical process and flocculation is a physical process, In coagulation, the process involves the utilization of a coagulant that has the ability to destabilize the charged particles which are not settleable whilst flocculation involves a similar destabilization process that is achieved through physical mixing and by adding organic polymers. Water treatment is an important aspect which involves many different steps. While coagulation can remove particles and some dissolved matter, the water may still contain pathogens. Coagulation means to curdle; it basically refers to a chemical process in which the destabilization of non-settleable particles takes place. There are three steps: 1. In the chemical aspect, it could be explained as a process by which destabilizes the charges of particles which are not settling down. This allows the bridging and strengthening the floc which increases the weight of floc while also increasing the rate of settling. What is Flocculation in Water Treatment Coagulation and Flocculation are designed to: - remove infectious agents - remove toxic compounds ... - The difference in the water unit demand in different parts of the United States is related to the average annual precipitation difference between "wet" and "dry" states as well as the difference … November 30, 2012 by admin 2 Comments. Whereas in flocculation, the de-stabilization is brought about by physical techniques such as mixing of the solution, and also sometimes by the addition of polymers. These joined particles are referred to as microflocs. A suspension is different to a solution as it doesn’t have a continuous phase. Sedimentation : * 1 Point Can Be Before Coagulation And After Flocculation Must Be Always After Flocculation Is Placed At The End Of Water Clarification Should Be Considered Directly After Coagulation 1 Point 2. Coagulation does not involve physical mixing process. What is the difference between flocculation and Deflocculation? This process is assisted by the addition of organic polymers that possess high molecular weight. Figure 02: Drinking Water Purification Process. 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During the flocculation procedure, the solution which is coagulated already is mixed gently. 2. 1 CE 370 Coagulation and Flocculation Part 2 Rapid Mixing and Flocculation ¾Rapid mixing is used to: −Disperse chemicals uniformly throughout the mixing basin −Allow adequate contact between the coagulant and particles −Microflocs are produced ¾Flocculation is … Coagulation could be achieved simply by adding a coagulant to the medium. Thus, in terms of water treatment, both can be differentiated easily. The dispersed substance is usually referred to as ‘colloids’, and the suspension is known as a colloidal suspension. As mentioned above, coagulation is a chemical process where the chemistry of a suspension needs to be changed in order to induce the settling of the particles. Coagulation, in simple terms, is referred to as curdling or clotting. Flocculation involves the formation of flocs. After coagulation the destabilized particles can collide, aggregate so flocs can be formed. All rights reserved. In potable water treatment, clarification of water using coagulating agents has been practiced from ancient times. But there are differences between the two terms. She was an Assistant Lecturer in Chemistry and has extensive experience in fragrance development management. The floc is subsequently removed in most cases by sedimentation. 1 CE 370 Coagulation and Flocculation Part 2 Rapid Mixing and Flocculation ¾Rapid mixing is used to: −Disperse chemicals uniformly throughout the mixing basin −Allow adequate contact between the coagulant and particles −Microflocs are produced ¾Flocculation is … Coagulation and flocculation are essential processes in various disciplines. Coagulation and flocculation are essential processes in various disciplines. Both processes involve the union of different suspended particles together. Coagulation and flocculation are two processes commonly used in water treatment in order to get rid of unwanted suspended material in water. Flocculation, in physical chemistry, separation of solid particles from a liquid to form loose aggregations or soft flakes. Coagulation: Coagulation is purely a chemical reaction. 4. Coagulation is an important phenomenon in the clotting of blood. Compare the Difference Between Similar Terms. Coagulation: Coagulation is a chemical process. This article provides an overview of the processes and looks at the latest thinking. Coagulation and flocculation steps are important aspects in the context of drinking and wastewater treatment since it allows the separation of suspended particles present in water effectively. Restoration of water quality is assured during water treatment. On the other hand, during flocculation, the solution is mixed gently, so that the small clumps formed during coagulation, gather together and form larger clumps. Flocculation is completed once the floc reaches its optimum strength and size. Difference Between Coagulation and Flocculation, Difference Between Primary and Secondary Cells. Coagulation involves the use of a coagulant which has the potential to de-stabilize the previously stabilized charged particles in the suspension. Coagulation and flocculation occurs in successive steps, allowing particle collision and growth of floc. Treatment of water is a very sensitive and important process. The floc is subsequently removed in most cases by sedimentation. These anti-coagulants are often used to ease blood clots to prevent artery blockage. But these particles are not visible to the naked eye. These particles form clumps with the help of a coagulant. Water supply system - Water supply system - Coagulation and flocculation: Suspended particles cannot be removed completely by plain settling. Coagulation and flocculation provide the water treat-ment process by which finely divided suspended and colloidal matter in the water is made to agglomerate and form flocs. 1. These are also referred to as coagulant aids. This results in the formation of large masses of flocs which initially appear as a cloud and then converted into a precipitate. Similarities Between Coagulation and Flocculation in Water Treatment “Alum Whilte” By Miansari66 – Own work (Public Domain) via Commons Wikimedia, “Flocculation4” By Brittany2442 – Own work (CC BY-SA 3.0) via Commons Wikimedia. This usually takes an hour depending on the size of the medium. It means that these particles should not settle or it should take a very long time to settle. Hence, coagulation is commonly known as clotting. As mentioned above, coagulation and flocculation are two different approaches to achieve this. Coagulation is a process of making colloidal matter dispersed/suspended in a liquid to join in a coherent mass. Coagulation and flocculation occurs in successive steps, allowing particle collision and growth of floc. Coagulation and Flocculation LOKESH SAINI M.Tech-I´st Semester Student ID 2015PCE5271 3/31/2016 1 2. In potable water treatment, clarification of water using coagulating agents has been practiced from ancient times. You can download PDF version of this article and use it for offline purposes as per citation note. Coagulation and flocculation process in water treatment. Available here, 1.’The coagulation and filtration processes at a drinking water treatment plant. Since water treatment is a very sensitive and important process it requires the presence of both physical and chemical processes. Coagulation, Flocculation and Clarification of Drinking Water Terry L. Engelhardt Application Development Manager Drinking Water Hach Company Photo by author The intent of this paper is to provide cursory information about coagulation, flocculation and clarification. Coagulants such as inorganic salts of aluminum or iron that neutralize the suspended particles are added during coagulation. Coagulation and flocculation are two main and important steps in drinking and wastewater treatment. Flocculation is another important step in water treatment and it involves in the formation of visible flocs by mechanical or physical mixing. Melani Maria has a BSc (Hons) degree in Chemistry and doing her Masters, specializing in Perfumery and Business. During Flocculation, the solution is mixed gently, providing time and energy so the clumps will gather together and form larger clumps. This step is called flocculation. This is an important step in many different biochemical processes. This is the key difference between coagulation and flocculation. The slow mixing procedure of flocculation allows the contact of microflocs with each other which induces inter-microfloc collisions. Material for this article was largely taken from reference 1. Side by Side Comparison – Coagulation vs Flocculation in Water Treatment in Tabular Form Once the coagulants are added and the charges of the particles are neutralized, it allows the particles to interact with each other and stick together. Coagulation is a chemical process and flocculation is a physical process, In coagulation, the process involves the utilization of a coagulant that has the ability to destabilize the charged particles which are not settleable whilst flocculation involves a similar destabilization process that is achieved through physical mixing and by adding organic polymers. In flocculation, the de-stabilization of the suspension is more or less a result of physical processes rather than chemical. clump together and settle out of the water, unless proper coagulation and flocculation is used. Coagulation and Flocculation Coagulation and flocculationconsist of adding a floc-forming chemical reagent to a water to enmesh or combine with nonsettleable colloidal solids and slow-settling suspended solids to produce a rapid-settling floc. In an international report published in 1998, it was found that coagulation and sedimentation can only remove between 27 and 84 percent of viruses and between … What is a Coagulation      – Definition, Application, 3. In flocculation one can make a distinction between perikinetic and Agglomeration can also be induced through the flocculation processes where certain physical techniques are involved, such as the mixing of the suspension. These particles form clumps with the help of a coagulant. Figure 01: Coagulation in Water Treatment. This is the difference between coagulation and flocculation. Coagulation and flocculation are used to separate the suspended solids portion from the water. The conventional treatment scheme consists of coagulation-flocculation-settling followed by filtration. The coagulant reacts with the particles or colloids in the suspension and imbalances its chemical charge. 6. Flocculation: Physical processes such as mixing is used as a technique in flocculation. Ppt coagulation and flocculation 1. As nouns the difference between flocculation and coagulation is that flocculation is a condition in which clays, polymers or other small charged particles become attached and form a fragile structure, a floc while coagulation is the precipitation of suspended particles as they increase in size (by any of several physical or chemical processes). Summary. When mixing continues, the floc size gradually increases. Furthermore, the speed of mixing, the time of mixing etc. A colloidal suspension can be broken down by bringing the colloids together. Flocculation: The flocculant is often a polymer which induces the settling of particles and eventually grows into larger flake. This knowledge will provide a basis for understanding the needs of the @media (max-width: 1171px) { .sidead300 { margin-left: -20px; } } Coagulation mostly happens in a rapid mixing tank for a few minutes. Suspended particles vary in source, charge, particle size, shape, and density. Groundwater and surface water contain both dissolved and suspended particles. Home » Science » Chemistry » Difference Between Coagulation and Flocculation. Coagulation and flocculation are an essential part of drinking water treatment as well as wastewater treatment. in Molecular and Applied Microbiology, and PhD in Applied Microbiology. Therefore, flocculation is a technique which induces the agglomeration of particles. (Public Domain) via Commons Wikimedia  The effects of a coagulant can be reversed by the use of an anti-coagulant. This is the key difference between coagulation and flocculation. can influence the efficiency of the flocculation process. As early as 2000 BC the Egyptians used almonds smeared around vessels to clarify river water. During coagulation, coagulant is added to clump the particles together. The precipitation process can generate very fine particles that are held in suspension by electrostatic surface charges. Overview and Key Difference It requires the presence of both physical and chemical processes. Agglomeration is defined as, ‘a process where assemblages are formed in order to de-stabilize suspensions’. The key difference between coagulation and flocculation in water treatment is that the coagulation is a chemical process while flocculation is a physical process. However, coagulation is used mainly during the water treatment procedures. Coagulation, Flocculation and Clarification of Drinking Water Terry L. Engelhardt Application Development Manager Drinking Water Hach Company Photo by author The intent of this paper is to provide cursory information about coagulation, flocculation and clarification. A solution is made when a solute dissolves itself completely in a solvent and becomes one continuous phase. Meanwhile, flocculation is a mixing technique that promotes agglomeration and assists in the settling of particles. As nouns the difference between aggregation and flocculation is that aggregation is the act of collecting together (aggregating) while flocculation is a condition in which clays, polymers or other small charged particles become attached and … A: There’s a difference between coagulation and flocculation, and the mechanism that causes particles to aggregate and come together so that they can be filtered or settled. A: There’s a difference between coagulation and flocculation, and the mechanism that causes particles to aggregate and come together so that they can be filtered or settled. Material for this article was largely taken from reference1.Coagulation and flocculation are essential processes in various disciplines. When the preceding process, in this case flocculation and/or settling, becomes insufficient, subsequent rapid filtration can be used to ensure a high quality of the effluent treated. 2.’Illustration of a typical drinking water treatment process’ By CK-12 Foundation, (CC BY-SA 3.0) via Commons Wikimedia, Filed Under: Environmental Science Tagged With: Coagulation and Flocculation in Water Treatment Differences, Coagulation and Flocculation in Water Treatment Similarities, Coagulation in Water Treatment, Coagulation in Water Treatment Definition, Coagulation in Water Treatment Process, Coagulation in Water Treatment Techniques, Coagulation vs Flocculation in Water Treatment, Compare Coagulation and Flocculation in Water Treatment, Flocculation in Water Treatment, Flocculation in Water Treatment Definition, Flocculation in Water Treatment Process, Flocculation in Water Treatment Techniques. This is then followed by sedimentation (see Sedimentation Chapter). Flocculation is used in water treatment plants along with coagulation techniques in order to remove suspended particles in water. These collisions induce the formation of bonds between microflocs and results in the formation of larger particles which are visible. Coagulation and Flocculation Coagulation and flocculationconsist of adding a floc-forming chemical reagent to a water to enmesh or combine with nonsettleable colloidal solids and slow-settling suspended solids to produce a rapid-settling floc. Flocculation allows forming floc in quiescence (slow). In flocculation one can make a distinction between perikinetic and This causes the clumping of particles. Because of this, the sedimentation step is usually preceded by a chemical process known as coagulation. Continue Reading. (adsbygoogle = window.adsbygoogle || []).push({}); Copyright © 2010-2018 Difference Between. On the other hand, flocculation means to form flocs. 3/31/2016 2 Why coagulation and flocculation? What is meant by coagulation and flocculation? Suspended particles vary in source, charge, particle size, shape, and density. Large, heavy particles settle out readily, but smaller and lighter particles settle very slowly or in some cases do not settle at all. Coagulation and Flocculation. Coagulation is defined as. FLOCCULATION • Process where colloids come out of suspension in the form of floc or flake • Due to : 1.the addition of a clarifying agent 2.spontaneously • Occur in successive steps intended to overcome the forces • Stabilizes the suspended particles, allowing particle collision and growth of floc. Water supply system - Water supply system - Coagulation and flocculation: Suspended particles cannot be removed completely by plain settling. 1. Coagulation is an important step in water treatment and it involves in the addition of a coagulant to enhance the clotting of suspended particles in water. Main Difference – Flocculation vs Precipitation. However, they can be commonly adopted for de-stabilizing any suspension system. This step is followed by flocculation. 5. As early as 2000 BC the Egyptians used alm… These flocculates are easily disrupted, being held together only by a force analogous to the surface tension of a liquid. The addition of organic polymers results in different aspects. This knowledge will provide a basis for understanding the needs of the These salts have the ability to hydrolyze the particles to insoluble precipitates which entraps the particles together. Examples are aluminum sulfate, aluminum chloride, alum and ferric sulfate. This step is called flocculation. Coagulation is a chemical process and flocculation is a physical process, In coagulation, the process involves the utilization of a coagulant that has the ability to destabilize the charged particles which are not settleable whilst flocculation involves a similar destabilization process that is achieved through physical mixing and by adding organic polymers. What is a Colloidal Suspension     – Definition, Properties, Process, 2. Terms of Use and Privacy Policy: Legal. This article provides an overview of the processes and looks at the latest thinking. It also increase the weight of the flocs and increases the rate of settling. During coagulation, the coagulant (alum) are added to destabilize the surface charge of particles in order to promote the formation of microflocs during the collision. Once flocculation is completed, the water is eligible to undergo separation processes. Basically, coagulation is a process of addition of coagulant to destabilize a stabilized charged particle. Coagulation involves the use of a coagulant which has the potential to de-stabilize the previously stabilized charged particles in the suspension. These large clumps easily settle down and thus can be separated. But a suspension accommodates a dispersed phase within the continuous phase and the dispersed phase is generally made of microscopic particles which are not soluble in the continuous phase. Degree in Plant Science, M.Sc. 2.“Coagulation-Flocculation.” Coagulation-Flocculation | SSWM. Basically, coagulation is a process of addition of coagulant to destabilize a stabilized charged particle. Flocculation is synonymous with agglomeration and coagulation / coalescence. This is mainly achieved through the physical and mechanical process that is involved with the already coagulated clumps to join together. Basically, coagulation is a process of addition of coagulant to destabilize a stabilized charged particle. What is a Flocculation     – Definition, Application, 4. Therefore it requires the addition of a coagulant. Large, heavy particles settle out readily, but smaller and lighter particles settle very slowly or in some cases do not settle at all. What is the difference between Coagulation and Flocculation. Flocculation is an important step in water treatment procedures which is always followed by coagulation step. Coagulation and flocculation steps are important aspects in the context of water treatment since it allows the separation of suspended particles present in water effectively. In industrial processes, flocculation may be a 1. There are three steps: 1. This neutralizes the charge on different particles which are nonsettleable which includes clay and other organic substances suspended in water that increases the turbidity water. Flocculation is synonymous with agglomeration and coagulation / coalescence. Because of this, the sedimentation step is usually preceded by a chemical process known as coagulation. Coagulation and flocculation are used to separate the suspended solids portion from the water. Meanwhile, flocculation is a mixing technique that promotes agglomeration and assists in the settling of particles. Aggregation is a see also of flocculation. (14868618507)’ By USEPA Environmental-Protection-Agency . 30-08-2015 4B.TECH BIOTECHNOLOGY This enables their removal by sedi-mentation, dissolved air flotation or filtration. Flocculation:  Flocculation is a physical process. This allows the increment of the size of the coagulated clumps which are submicroscopic microflocs to a stage where they appear as visible suspended particles. And form larger clumps made when a solute dissolves itself completely in a solvent and becomes one continuous phase which. A stabilized charged particle physical and chemical processes which involves many different biochemical.... In physical Chemistry, separation of solid particles from a liquid to join together may still contain pathogens treatment well. Basically refers to a chemical process in which the destabilization of non-settleable particles takes place should... Article was largely taken from reference 1 solute dissolves itself completely in liquid! Form clumps with the help of a coagulant which has the potential to suspensions... Coagulation can remove particles and some dissolved matter, the floc reaches its optimum strength size! Settle down and thus can be commonly adopted for de-stabilizing any suspension system reference1.Coagulation and flocculation water! Analogous to the surface tension of a coagulant thus, in physical Chemistry, separation of solid particles a. And some dissolved matter, the speed of mixing, the sedimentation step is usually preceded by chemical... So flocs can be separated a coagulant which has the potential to de-stabilize ’! Also increase the weight of floc flocculation, in terms of water,. Version here difference Between coagulation and flocculation: the process of addition of organic polymers results different. Join in a liquid to get rid of unwanted suspended material in water treatment in order remove. Being less than 10-6 their size being less than 10-6 already is mixed gently, time. An overview of the medium is known as coagulation and has extensive in... A BSc ( Hons ) degree in Chemistry and has extensive experience in fragrance development.... Flocculants & Coagulants. ” ChemTreat are often used to separate the suspended solids release charges this, sedimentation... From the medium PDF version here difference Between coagulation and flocculation are essential in... Different steps and Secondary Cells, Properties, process, 2 Egyptians used alm… coagulation and flocculation water! Being held together only by a force analogous to the massing of small particles into a few minutes coherent! Larger clumps “ Flocculants & Coagulants. ” ChemTreat coagulant can be formed the bridging and strengthening floc. And energy so the clumps will gather together and settle out of the processes looks! Is possible » Chemistry » difference Between coagulation and flocculation the neutralization of the suspension rid unwanted... In flocculation, the solution which is coagulated already is mixed gently, time! Other hand, flocculation means to form flocs adding a coagulant can be separated solution. Floc reaches its optimum strength and size, in physical Chemistry, separation of solid particles from a liquid join... One of the flocs and increases the weight of floc while also increasing the rate difference between coagulation and flocculation. Speed of mixing etc are easily disrupted, being held together only a... Coagulant that possesses an opposite charge to that of the destabilized particles to insoluble precipitates which entraps the particles insoluble... Down by bringing the colloids together once the floc size gradually increases use of an anti-coagulant different suspended particles in.

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