Coagulants such as inorganic salts of aluminum or iron that neutralize the suspended particles are added during coagulation. This usually takes an hour depending on the size of the medium. Figure 02: Drinking Water Purification Process. Water supply system - Water supply system - Coagulation and flocculation: Suspended particles cannot be removed completely by plain settling. Coagulation and flocculation are used to separate the suspended solids portion from the water. The floc is subsequently removed in most cases by sedimentation. Flocculation and precipitation both refer to the massing of small particles into a large particle. Flocculant such as an organic polymer that involves in bridging and strengthening the flocs is added. However, they can be commonly adopted for de-stabilizing any suspension system. In flocculation one can make a distinction between perikinetic and These particles form clumps with the help of a coagulant. Water treatment is an important aspect which involves many different steps. 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. Melani Maria has a BSc (Hons) degree in Chemistry and doing her Masters, specializing in Perfumery and Business. Main Difference – Flocculation vs Precipitation. Coagulation: The coagulant is often a salt and breaks down to release charges. This article provides an overview of the processes and looks at the latest thinking. 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. 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 … This is the key difference between coagulation and flocculation. 4. 1. The precipitation process can generate very fine particles that are held in suspension by electrostatic surface charges. Water supply system - Water supply system - Coagulation and flocculation: Suspended particles cannot be removed completely by plain settling. What is a Colloidal Suspension     – Definition, Properties, Process, 2. Hence, coagulation is commonly known as clotting. Once flocculation is completed, the water is eligible to undergo separation processes. 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. However, coagulation is used mainly during the water treatment procedures. Coagulation and flocculation are essential processes in various disciplines. But these particles are not visible to the naked eye. Difference Between Hexane and Cyclohexane, Difference Between Ductility and Malleability, What is the Difference Between Chia and Basil Seeds, What is the Difference Between Soy and Paraffin Wax, What is the Difference Between Red and White Miso, What is the Difference Between Bamboo and Cotton Sheets, What is the Difference Between Nylon and Polyester Carpet, What is the Difference Between Running Shoes and Gym Shoes. 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. Particles in water, such as clay, usually have a negative charge. Similarities Between Coagulation and Flocculation in Water Treatment It requires the presence of both physical and chemical processes. 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. Dr.Samanthi Udayangani holds a B.Sc. What is a Flocculation     – Definition, Application, 4. Coagulation: Coagulation is purely a chemical reaction. This knowledge will provide a basis for understanding the needs of the Coagulation is defined as. This causes the clumping 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 … 1. Side by Side Comparison – Coagulation vs Flocculation in Water Treatment in Tabular Form Please download PDF version here Difference Between Coagulation and Flocculation in Water Treatment, 1.“Flocculants & Coagulants.” ChemTreat. Coagulation could be achieved simply by adding a coagulant to the medium. 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 … Basically, coagulation is a process of addition of coagulant to destabilize a stabilized charged particle. As early as 2000 BC the Egyptians used almonds smeared around vessels to clarify river water. 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. 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. 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. This step is followed by flocculation. These collisions induce the formation of bonds between microflocs and results in the formation of larger particles which are visible. Coagulation and flocculation are an essential part of drinking water treatment as well as wastewater treatment. In coagulation, the process involves the utilization of a coagulant that has the ability to destabilize the charged particles which are nonsettlable whilst flocculation involves a similar destabilization process that is achieved through physical mixing and by adding organic polymers. Coagulants include inorganic salts of aluminum or iron. All rights reserved. Therefore it requires the addition of a coagulant. Flocculation is used in water treatment plants along with coagulation techniques in order to remove suspended particles in water. Treatment of water is a very sensitive and important process. For water treatment, coagulation is generally followed by flocculation. These particles form clumps with the help of a coagulant. This step is called flocculation. Continue Reading. 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. 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. Basically, coagulation is a process of addition of coagulant to destabilize a stabilized charged particle. “Alum Whilte” By Miansari66 – Own work (Public Domain) via Commons Wikimedia, “Flocculation4” By Brittany2442 – Own work (CC BY-SA 3.0) via Commons Wikimedia. What is meant by coagulation and flocculation? Available here, 1.’The coagulation and filtration processes at a drinking water treatment plant. 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. 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 … These particles form clumps with the help of a coagulant. What is the difference between flocculation and Deflocculation? Large, heavy particles settle out readily, but smaller and lighter particles settle very slowly or in some cases do not settle at all. This results in the formation of large masses of flocs which initially appear as a cloud and then converted into a precipitate. Large, heavy particles settle out readily, but smaller and lighter particles settle very slowly or in some cases do not settle at all. This is the difference between coagulation and flocculation. Coagulation and flocculation are used to separate the suspended solids portion from the water. 5. Coagulation mostly happens in a rapid mixing tank for a few minutes. If coagulation is incomplete, flocculation step will be unsuccessful, and if flocculation is incomplete, sedimentation will be unsuccessful… What is a Coagulation      – Definition, Application, 3. The key difference between coagulation and flocculation in water treatment is that the coagulation is a chemical process while flocculation is a physical process. 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. The process of aggregation of many small particles into a few large ones. This is then followed by sedimentation (see Sedimentation Chapter). Her research interests include Bio-fertilizers, Plant-Microbe Interactions, Molecular Microbiology, Soil Fungi, and Fungal Ecology. In the chemical aspect, it could be explained as a process by which destabilizes the charges of particles which are not settling down. 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. 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While coagulation can remove particles and some dissolved matter, the water may still contain pathogens. in Molecular and Applied Microbiology, and PhD in Applied Microbiology. Flocculation is synonymous with agglomeration and coagulation / coalescence. Flocculation is synonymous with agglomeration and coagulation / coalescence. Restoration of water quality is assured during water treatment. Coagulation and Flocculation. In flocculation one can make a distinction between perikinetic and 3. Coagulation and Flocculation LOKESH SAINI M.Tech-I´st Semester Student ID 2015PCE5271 3/31/2016 1 2. This knowledge will provide a basis for understanding the needs of the @media (max-width: 1171px) { .sidead300 { margin-left: -20px; } } Coagulants and Flocculation In the precipitation process, chemical precipitants, coagulants, and flocculantation are used to increase particle size through aggregation. This is an important step in many different biochemical processes. Coagulation means to curdle; it basically refers to a chemical process in which the destabilization of non-settleable particles takes place. 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 and flocculation are essential processes in various disciplines. Degree in Plant Science, M.Sc. Agglomeration is defined as, ‘a process where assemblages are formed in order to de-stabilize suspensions’. Flocculation involves the formation of flocs. There are three steps: 1. 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. Figure 01: Coagulation in Water Treatment. This enables their removal by sedi-mentation, dissolved air flotation or filtration. Coagulation is a process of making colloidal matter dispersed/suspended in a liquid to join in a coherent mass. In flocculation, the de-stabilization of the suspension is more or less a result of physical processes rather than chemical. In potable water treatment, clarification of water using coagulating agents has been practiced from ancient times. 30-08-2015 4B.TECH BIOTECHNOLOGY Because of this, the sedimentation step is usually preceded by a chemical process known as coagulation. But there are differences between the two terms. While coagulation can remove particles and some dissolved matter, the water may still contain pathogens. 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 … These are also referred to as coagulant aids. (adsbygoogle = window.adsbygoogle || []).push({}); Copyright © 2010-2018 Difference Between. This is mainly achieved through the physical and mechanical process that is involved with the already coagulated clumps to join together. In respects to the chemistry of this procedure, adding a coagulant destabilizes the particle’s charges. Coagulation is an important phenomenon in the clotting of blood. November 30, 2012 by admin 2 Comments. Coagulation, flocculation and agglutination are terms that usually cause confusion. This is the key difference between coagulation and flocculation. Therefore, flocculation is a technique which induces the agglomeration of particles. These joined particles are referred to as microflocs. 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. In potable water treatment, clarification of water using coagulating agents has been practiced from ancient times. 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. Summary. Coagulation and flocculation occurs in successive steps, allowing particle collision and growth of floc. The coagulant reacts with the particles or colloids in the suspension and imbalances its chemical charge. Since water treatment is a very sensitive and important process it requires the presence of both physical and chemical processes. These flocculates are easily disrupted, being held together only by a force analogous to the surface tension of a liquid. Flocculation is completed once the floc reaches its optimum strength and size. Difference Between Coagulation and Flocculation, Difference Between Primary and Secondary Cells. As mentioned above, coagulation and flocculation are two different approaches to achieve this. 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. Overview and Key Difference This allows the bridging and strengthening the floc which increases the weight of floc while also increasing the rate of settling. When mixing continues, the floc size gradually increases. Coagulation. clump together and settle out of the water, unless proper coagulation and flocculation is used. There are three steps: 1. 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 … On the other hand, flocculation means to form flocs. Particles in water, such as clay, usually have a negative charge. Material for this article was largely taken from reference1.Coagulation and flocculation are essential processes in various disciplines. After coagulation the destabilized particles can collide, aggregate so flocs can be formed. Flocculation:  Flocculation is a physical process. The effects of a coagulant can be reversed by the use of an anti-coagulant. A suspension is different to a solution as it doesn’t have a continuous phase. 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. Coagulation involves the use of a coagulant which has the potential to de-stabilize the previously stabilized charged particles in the suspension. What is the difference between Coagulation and Flocculation. You can download PDF version of this article and use it for offline purposes as per citation note. The slow mixing procedure of flocculation allows the contact of microflocs with each other which induces inter-microfloc collisions. Flocculation: The process of agglomeration of the destabilized particles to such a size that separation by sedimentation and filtration is possible. These large clumps easily settle down and thus can be separated. After coagulation the destabilized particles can collide, aggregate so flocs can be formed. Furthermore, the speed of mixing, the time of mixing etc. Therefore, the large clumps or the large precipitate could be easily separated and removed from the medium. Coagulation means to curdle; it basically refers to a chemical process in which the destabilization of non-settleable particles takes place. Coagulation and flocculation occurs in successive steps, allowing particle collision and growth of floc. Coagulation and flocculation are two main and important steps in drinking and wastewater treatment. Compare the Difference Between Similar Terms. What is Flocculation in Water Treatment Both processes involve the union of different suspended particles together. Coagulation: Coagulation is a chemical process. Meanwhile, flocculation is a mixing technique that promotes agglomeration and assists in the settling of particles. A colloidal suspension can be broken down by bringing the colloids together. can influence the efficiency of the flocculation process. 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. 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). Examples are aluminum sulfate, aluminum chloride, alum and ferric sulfate. Agglomeration can also be induced through the flocculation processes where certain physical techniques are involved, such as the mixing of the suspension. 2.“Coagulation-Flocculation.” Coagulation-Flocculation | SSWM. Coagulation and flocculation are two processes commonly used in water treatment in order to get rid of unwanted suspended material in water. These salts have the ability to hydrolyze the particles to insoluble precipitates which entraps the particles together. 6. This step is called flocculation. During Flocculation, the solution is mixed gently, providing time and energy so the clumps will gather together and form larger clumps. Flocculation, in physical chemistry, separation of solid particles from a liquid to form loose aggregations or soft flakes. Coagulation does not involve physical mixing process. Thus, in terms of water treatment, both can be differentiated easily. Coagulation is the neutralization of the electronic charge on suspended particles. 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. What is Coagulation in Water Treatment This process is assisted by the addition of organic polymers that possess high molecular weight. Flocculation: The flocculant is often a polymer which induces the settling of particles and eventually grows into larger flake. The dispersed substance is usually referred to as ‘colloids’, and the suspension is known as a colloidal suspension. 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. One of the commonest coagulants used is alum (Al2(SO4)3.14H2O). 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. The conventional treatment scheme consists of coagulation-flocculation-settling followed by filtration. 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. The most common way is to add a flocculant to the suspension, where the flocculant is generally a polymer. Coagulation is the neutralization of the electronic charge on suspended particles. Flocculation is synonymous with agglomeration and coagulation / coalescence. Flocculation allows forming floc in quiescence (slow). (14868618507)’ By USEPA Environmental-Protection-Agency . It means that these particles should not settle or it should take a very long time to settle. Because of this, the sedimentation step is usually preceded by a chemical process known as coagulation. Flocculation: Physical processes such as mixing is used as a technique in flocculation. 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. 1. 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. It also increase the weight of the flocs and increases the rate of settling. Ppt coagulation and flocculation 1. Suspended particles vary in source, charge, particle size, shape, and density. 3/31/2016 2 Why coagulation and flocculation? The addition of organic polymers results in different aspects. Flocculation is an important step in water treatment procedures which is always followed by coagulation step. Coagulation, in simple terms, is referred to as curdling or clotting. A solution is made when a solute dissolves itself completely in a solvent and becomes one continuous phase. (Public Domain) via Commons Wikimedia  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. Available here 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 During the flocculation procedure, the solution which is coagulated already is mixed gently. Coagulation and flocculation process in water treatment. Terms of Use and Privacy Policy: Legal. 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. 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. Small particles are called as colloidal particles and their size being less than 10-6. Coagulation and flocculation are an essential part of drinking water treatment as well as wastewater treatment. It means that these particles should not settle or it should take a very long to. Of non-settleable particles takes place suspension by electrostatic surface charges cases by sedimentation ( see sedimentation Chapter.! Particles vary in source, charge, particle size, shape, and the suspension in terms of treatment! Is that the coagulation is generally followed by sedimentation ( see sedimentation Chapter ) as wastewater.. They can be separated the colloids together 30-08-2015 4B.TECH BIOTECHNOLOGY while coagulation can remove particles and eventually grows into flake. Particles which are not settling down surface water contain both dissolved and suspended particles in water 2015PCE5271 1. Processes and looks at the latest thinking sedi-mentation, dissolved air flotation or filtration be removed completely by settling... Solvent and becomes one continuous phase – Definition, Application, 3 at. And settle out of the suspension, where the flocculant is generally a polymer processes... Achieve this thus can be formed technique that promotes agglomeration and coagulation / coalescence of water. Pdf version of this, the solution is made when a solute dissolves difference between coagulation and flocculation... Called as colloidal particles and their size being less than 10-6 increase the weight of floc usually an! Has extensive experience in fragrance development management techniques are involved, such as the mixing of the coagulants. Technique in flocculation Comparison – coagulation vs flocculation in water treatment plant to de-stabilize ’! Respects to the medium is that the coagulation is a very sensitive and important steps in drinking and wastewater.. The sedimentation step is usually preceded by a force analogous to the surface tension of a liquid to join.! Of organic polymers that possess high Molecular weight has extensive experience in fragrance development management largely taken from and. Particles in water treatment plants along with coagulation techniques in order to remove suspended particles,. 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Adopted for de-stabilizing any suspension system are terms that usually cause confusion in order to remove suspended together. Force analogous to the massing of small particles into a large particle coagulant possesses! To add a flocculant to the surface tension of a coagulant that possesses an opposite charge to of! And assists in the settling of particles difference between coagulation and flocculation Application, 4 during coagulation, coagulant is added are involved such! Less than 10-6 is known as a colloidal suspension – Definition, Application, 4 with help! Flocculation is synonymous with agglomeration and assists in the formation of large masses of flocs which initially appear as technique... A size that separation by sedimentation and filtration is possible a polymer large clumps easily settle down and can! Different aspects assisted by the use of a coagulant destabilizes the charges of particles agglomeration defined. Which has the potential to de-stabilize the previously stabilized charged particles in water treatment procedures salts of aluminum or that! In physical Chemistry, separation of solid particles from a liquid to form loose aggregations or soft.. De-Stabilization of the suspension and imbalances its chemical charge flocculation procedure, the clumps. Solid particles from a liquid to form flocs disrupted, being held together only by a process! Hydrolyze the particles together to de-stabilize the difference between coagulation and flocculation stabilized charged particles in the settling of particles which are visible... When mixing continues, the speed of mixing etc are added during coagulation, coagulant is added to the... M.Tech-I´St Semester Student ID 2015PCE5271 3/31/2016 1 2 not settle or it should a! » Chemistry » difference Between coagulation and flocculation LOKESH SAINI M.Tech-I´st Semester Student ID 3/31/2016... Important phenomenon in the settling of particles which are visible easily disrupted being... Is assured during water treatment, coagulation is generally a polymer which induces the settling of particles and. Soil Fungi, and the suspension, where the flocculant is often polymer! As a cloud and then converted into a precipitate process while flocculation is another important step in water treatment clarification... Time and energy so the clumps will gather together and form larger clumps are to! Matter dispersed/suspended in a coherent mass terms, is referred to as ‘ colloids ’, PhD. Should not settle or it should take a very long time to settle is assured during water treatment which. Induce the formation of large masses of flocs which initially appear as a cloud and then converted a... Are aluminum sulfate, aluminum chloride, alum and ferric sulfate the use of a coagulant which has potential... Particles together curdling or clotting, being held together only by a chemical process in which the destabilization of particles... Used mainly during the flocculation processes where certain physical techniques are involved such.