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As mentioned above, coagulation and flocculation are two different approaches to achieve this. The most common way is to add a flocculant to the suspension, where the flocculant is generally a polymer. These anti-coagulants are often used to ease blood clots to prevent artery blockage. This knowledge will provide a basis for understanding the needs of the Please download PDF version here Difference Between Coagulation and Flocculation in Water Treatment, 1.“Flocculants & Coagulants.” ChemTreat. The floc is subsequently removed in most cases by sedimentation. 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. Flocculant such as an organic polymer that involves in bridging and strengthening the flocs is added. Coagulation involves the use of a coagulant which has the potential to de-stabilize the previously stabilized charged particles in the suspension. As early as 2000 BC the Egyptians used almonds smeared around vessels to clarify river water. 3/31/2016 2 Why coagulation and flocculation? Continue Reading. Meanwhile, flocculation is a mixing technique that promotes agglomeration and assists in the settling of particles. 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 … As early as 2000 BC the Egyptians used alm… This step is followed by flocculation. Coagulation: The coagulant is often a salt and breaks down to release charges. Coagulation and flocculation are an essential part of drinking water treatment as well as wastewater treatment. The process of aggregation of many small particles into a few large ones. This article provides an overview of the processes and looks at the latest thinking. This is mainly achieved through the physical and mechanical process that is involved with the already coagulated clumps to join together. Coagulation is an important phenomenon in the clotting of blood. 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. Meanwhile, flocculation is a mixing technique that promotes agglomeration and assists in the settling of particles. During Flocculation, the solution is mixed gently, providing time and energy so the clumps will gather together and form larger clumps. Home » Science » Chemistry » Difference Between Coagulation and Flocculation. Coagulation and flocculation are used to separate the suspended solids portion from the water. Similarities Between Coagulation and Flocculation in Water Treatment After coagulation the destabilized particles can collide, aggregate so flocs can be formed. (14868618507)’ By USEPA Environmental-Protection-Agency . This is an important step in many different biochemical processes. Particles in water, such as clay, usually have a negative charge. Coagulation is defined as. Particles in water, such as clay, usually have a negative charge. Groundwater and surface water contain both dissolved and suspended particles. But there are differences between the two terms. On the other hand, flocculation means to form flocs. Coagulation and Flocculation. This knowledge will provide a basis for understanding the needs of the 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. This process is assisted by the addition of organic polymers that possess high molecular weight. Coagulation and flocculation are an essential part of drinking water treatment as well as wastewater treatment. What is a Colloidal Suspension – Definition, Properties, Process, 2. 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. However, they can be commonly adopted for de-stabilizing any suspension system. 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. This is achieved by adding a coagulant that possesses an opposite charge to that of the suspended solids. What is a Coagulation – Definition, Application, 3. 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. The key difference between coagulation and flocculation in water treatment is that the coagulation is a chemical process while flocculation is a physical process. 30-08-2015 4B.TECH BIOTECHNOLOGY 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. This causes the clumping of particles. Both processes involve the union of different suspended particles together. Main Difference – Flocculation vs Precipitation. Coagulation and flocculation occurs in successive steps, allowing particle collision and growth of floc. Material for this article was largely taken from reference 1. What is Flocculation in Water Treatment 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. 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. This results in the formation of large masses of flocs which initially appear as a cloud and then converted into a precipitate. 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. Coagulation and flocculation are essential processes in various disciplines. 1. For water treatment, coagulation is generally followed by flocculation. Coagulants and Flocculation In the precipitation process, chemical precipitants, coagulants, and flocculantation are used to increase particle size through aggregation. 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: The flocculant is often a polymer which induces the settling of particles and eventually grows into larger flake. Treatment of water is a very sensitive and important process. Flocculation: The process of agglomeration of the destabilized particles to such a size that separation by sedimentation and filtration is possible. 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 … This step is called flocculation. What is the difference between Coagulation and Flocculation. Flocculation is used in water treatment plants along with coagulation techniques in order to remove suspended particles in water. Flocculation, in physical chemistry, separation of solid particles from a liquid to form loose aggregations or soft flakes. Ppt coagulation and flocculation 1. Melani Maria has a BSc (Hons) degree in Chemistry and doing her Masters, specializing in Perfumery and Business. clump together and settle out of the water, unless proper coagulation and flocculation is used. Coagulation means to curdle; it basically refers to a chemical process in which the destabilization of non-settleable particles takes place. Coagulation is a process of making colloidal matter dispersed/suspended in a liquid to join in a coherent mass. Terms of Use and Privacy Policy: Legal. Dr.Samanthi Udayangani holds a B.Sc. 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. Overview and Key Difference Coagulation means to curdle; it basically refers to a chemical process in which the destabilization of non-settleable particles takes place. Basically, coagulation is a process of addition of coagulant to destabilize a stabilized charged particle. The dispersed substance is usually referred to as ‘colloids’, and the suspension is known as a colloidal suspension. Examples are aluminum sulfate, aluminum chloride, alum and ferric sulfate. Because of this, the sedimentation step is usually preceded by a chemical process known as coagulation. 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. Aggregation is a see also of flocculation. (Public Domain) via Commons Wikimedia Coagulation and flocculation are essential processes in various disciplines. 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). 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. In flocculation one can make a distinction between perikinetic and Side by Side Comparison – Coagulation vs Flocculation in Water Treatment in Tabular Form 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. Water supply system - Water supply system - Coagulation and flocculation: Suspended particles cannot be removed completely by plain settling. 6. In respects to the chemistry of this procedure, adding a coagulant destabilizes the particle’s charges. 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. 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 potable water treatment, clarification of water using coagulating agents has been practiced from ancient times. But these particles are not visible to the naked eye. This usually takes an hour depending on the size of the medium. This is the key difference between coagulation and flocculation. A suspension is different to a solution as it doesn’t have a continuous phase. Coagulation and flocculation are used to separate the suspended solids portion from the water. Coagulation and Flocculation LOKESH SAINI M.Tech-I´st Semester Student ID 2015PCE5271 3/31/2016 1 2. Large, heavy particles settle out readily, but smaller and lighter particles settle very slowly or in some cases do not settle at all. Agglomeration can also be induced through the flocculation processes where certain physical techniques are involved, such as the mixing of the suspension. This is then followed by sedimentation (see Sedimentation Chapter). Flocculation is synonymous with agglomeration and coagulation / coalescence. 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. A colloidal suspension can be broken down by bringing the colloids together. 5. Coagulation and flocculation are two processes commonly used in water treatment in order to get rid of unwanted suspended material in water. However, coagulation is used mainly during the water treatment procedures. November 30, 2012 by admin 2 Comments. The conventional treatment scheme consists of coagulation-flocculation-settling followed by filtration. A solution is made when a solute dissolves itself completely in a solvent and becomes one continuous phase. Coagulation is the neutralization of the electronic charge on suspended particles. This step is called flocculation. During coagulation, coagulant is added to clump the particles together. Flocculation: Flocculation is a physical process. These salts have the ability to hydrolyze the particles to insoluble precipitates which entraps the particles together. Her research interests include Bio-fertilizers, Plant-Microbe Interactions, Molecular Microbiology, Soil Fungi, and Fungal Ecology. Therefore it requires the addition of a coagulant. 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. All rights reserved. Coagulation means to curdle; it basically refers to a chemical process in which the destabilization of non-settleable particles takes place. When mixing continues, the floc size gradually increases. It means that these particles should not settle or it should take a very long time to settle. These are also referred to as coagulant aids. Available here, 1.’The coagulation and filtration processes at a drinking water treatment plant. 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. Coagulation and flocculation are two main and important steps in drinking and wastewater treatment. 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