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difference between coagulation and flocculation

In the chemical aspect, it could be explained as a process by which destabilizes the charges of particles which are not settling down. Coagulants and Flocculation In the precipitation process, chemical precipitants, coagulants, and flocculantation are used to increase particle size through aggregation. Dr.Samanthi Udayangani holds a B.Sc. These particles form clumps with the help of a coagulant. 2.“Coagulation-Flocculation.” Coagulation-Flocculation | SSWM. 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. During coagulation, coagulant is added to clump the particles together. A solution is made when a solute dissolves itself completely in a solvent and becomes one continuous phase. 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This step is called flocculation. 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. Available here, 1.’The coagulation and filtration processes at a drinking water treatment plant. Coagulation and Flocculation LOKESH SAINI M.Tech-I´st Semester Student ID 2015PCE5271 3/31/2016 1 2. 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. Flocculation is synonymous with agglomeration and coagulation / coalescence. Coagulation mostly happens in a rapid mixing tank for a few minutes. The dispersed substance is usually referred to as ‘colloids’, and the suspension is known as a colloidal suspension. Coagulation and flocculation are essential processes in various disciplines. 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. 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. In flocculation, the de-stabilization of the suspension is more or less a result of physical processes rather than chemical. Therefore, the large clumps or the large precipitate could be easily separated and removed from the medium. Coagulation and Flocculation. Coagulation and flocculation are two processes commonly used in water treatment in order to get rid of unwanted suspended material in water. Compare the Difference Between Similar Terms. Meanwhile, flocculation is a mixing technique that promotes agglomeration and assists in the settling of particles. Summary. Coagulation and flocculation process in water treatment. 2. Flocculation, in physical chemistry, separation of solid particles from a liquid to form loose aggregations or soft flakes. You can download PDF version of this article and use it for offline purposes as per citation note. 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. Both processes involve the union of different suspended particles together. This results in the formation of large masses of flocs which initially appear as a cloud and then converted into a precipitate. Terms of Use and Privacy Policy: Legal. Flocculation involves the formation of flocs. During the flocculation procedure, the solution which is coagulated already is mixed gently. Home » Science » Chemistry » Difference Between Coagulation and Flocculation. Furthermore, the speed of mixing, the time of mixing etc. Therefore, flocculation is a technique which induces the agglomeration of particles. Coagulation is defined as. Flocculation:  Flocculation is a physical process. Meanwhile, flocculation is a mixing technique that promotes agglomeration and assists in the settling of particles. Material for this article was largely taken from reference 1. Once flocculation is completed, the water is eligible to undergo separation processes. Since water treatment is a very sensitive and important process it requires the presence of both physical and chemical processes. 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For water treatment, coagulation is generally followed by flocculation. In potable water treatment, clarification of water using coagulating agents has been practiced from ancient times. Ppt coagulation and flocculation 1. (Public Domain) via Commons Wikimedia  All rights reserved. Because of this, the sedimentation step is usually preceded by a chemical process known as coagulation. This is an important step in many different biochemical processes. 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. Coagulation is an important phenomenon in the clotting of blood. 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 steps are important aspects in the context of drinking and wastewater treatment since it allows the separation of suspended particles present in water effectively. Coagulation. This is the key difference between coagulation and flocculation. What is Coagulation in Water Treatment 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, they can be commonly adopted for de-stabilizing any suspension system. This step is followed by flocculation. Material for this article was largely taken from reference1.Coagulation and flocculation are essential processes in various disciplines. 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 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. But these particles are not visible to the naked eye. 30-08-2015 4B.TECH BIOTECHNOLOGY As mentioned above, coagulation and flocculation are two different approaches to achieve this. 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. 3/31/2016 2 Why coagulation and flocculation? 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 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 … Coagulation is the neutralization of the electronic charge on suspended particles. 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. Particles in water, such as clay, usually have a negative charge. It means that these particles should not settle or it should take a very long time to settle. Coagulation involves the use of a coagulant which has the potential to de-stabilize the previously stabilized charged particles in the suspension. 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. Coagulation and flocculation are two main and important steps in drinking and wastewater treatment. During Flocculation, the solution is mixed gently, providing time and energy so the clumps will gather together and form larger clumps. This usually takes an hour depending on the size of the medium. 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. There are three steps: 1. After coagulation the destabilized particles can collide, aggregate so flocs can be formed. Flocculation and precipitation both refer to the massing of small particles into a large particle. November 30, 2012 by admin 2 Comments. This is achieved by adding a coagulant that possesses an opposite charge to that of the suspended solids. This is mainly achieved through the physical and mechanical process that is involved with the already coagulated clumps to join together. What is a Colloidal Suspension     – Definition, Properties, Process, 2. Continue Reading. 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. Large, heavy particles settle out readily, but smaller and lighter particles settle very slowly or in some cases do not settle at all. Coagulation: The coagulant is often a salt and breaks down to release charges. The coagulant reacts with the particles or colloids in the suspension and imbalances its chemical charge. 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. A suspension is different to a solution as it doesn’t have a continuous phase. In industrial processes, flocculation may be a Coagulation is a process of making colloidal matter dispersed/suspended in a liquid to join in a coherent mass. Figure 01: Coagulation in Water Treatment. This step is called flocculation. But there are differences between the two terms. 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 is used in water treatment plants along with coagulation techniques in order to remove suspended particles in water. Coagulation does not involve physical mixing process. Main Difference – Flocculation vs Precipitation. Coagulation and flocculation occurs in successive steps, allowing particle collision and growth of floc. Flocculation: The flocculant is often a polymer which induces the settling of particles and eventually grows into larger flake. Examples are aluminum sulfate, aluminum chloride, alum and ferric sulfate. These particles form clumps with the help of a coagulant. This is then followed by sedimentation (see Sedimentation Chapter). This is the difference between coagulation and flocculation. Coagulants such as inorganic salts of aluminum or iron that neutralize the suspended particles are added during coagulation. In flocculation one can make a distinction between perikinetic and When mixing continues, the floc size gradually increases. It also increase the weight of the flocs and increases the rate of settling. The addition of organic polymers results in different aspects. can influence the efficiency of the flocculation process. The most common way is to add a flocculant to the suspension, where the flocculant is generally a polymer. Suspended particles vary in source, charge, particle size, shape, and density. Water supply system - Water supply system - Coagulation and flocculation: Suspended particles cannot be removed completely by plain settling. Any suspension system means to curdle ; it basically refers to a chemical process in the... Time of mixing, the floc is subsequently removed in most cases by sedimentation ( see sedimentation )... Stabilized charged particles in water treatment, both can be reversed by the addition of coagulant destabilize... Basically refers to a solution is mixed gently get rid of unwanted suspended material in treatment! Of organic polymers results in the chemical aspect, it could be easily and... Treatment scheme consists of coagulation-flocculation-settling followed by flocculation completely by plain settling join. 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