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14: Coagulation and Flocculation Workforce LibreTexts

Nov 22, 2020 Flocculation is the slow mixing process that causes smaller particles to merge into larger particles that settle more easily The particles are then more easily removed in the sedimentation and filtration process The process of flocculation is achieved by controlling the rate of impacts between particles as they gain sizeCoagulation, Flocculation, Sedimentation Need for Coagulation and Flocculation • Remove particulate impurities, especially nonsettleable solids, and color from water being treated • Coagulation chemicals cause particles to destabilize and clump together forming floc Coagulation, Flocculation, SedimentationCOAGULATION, FLOCCULATION, AND SEDIMENTATIONThe flocculation tank has wooden paddletype mixers that slowly rotate on a horizontal motordriven shaft After flocculation the water flows into the sedimentation tanks Some small watertreatment plants combine coagulation and sedimentation in a single prefabricated steel unit called a solidscontact tankWater supply system Coagulation and flocculation There are three main mechanisms that particles can collide and form flocs while in the flocculation basin: Brownian motion (diffusion), fluid shear and differential sedimentation Brownian motion is the random movement of particles in water due to the continual bombardment of Drinking Water Treatment: Coagulation, Flocculation, and Coagulation, Flocculation, Sedimentation Need for Coagulation and Flocculation • Remove particulate impurities, especially nonsettleable solids, and color from water being treated • Coagulation chemicals cause particles to destabilize and clump together forming floc Coagulation, Flocculation, SedimentationCOAGULATION, FLOCCULATION, AND SEDIMENTATION

Drinking Water Treatment: Coagulation, Flocculation, and

There are three main mechanisms that particles can collide and form flocs while in the flocculation basin: Brownian motion (diffusion), fluid shear and differential sedimentation Brownian motion is the random movement of particles in water due to the continual bombardment of Flash Mix Aluminum Sulphate or "alum" is a coagulating agent that is injected in the water at a respective dosage that is dependent on the raw water quality In the flash mix or rapid mix chamber the alum is dispersed evenly with the aid of a mixerGetting water to youAug 30, 2015 Flocculation Sedimentation 1 Operational Considerations Flocculation requires careful attention • mixing velocity and amount of mix energy • prevent the floc from tearing apart or shearing, the mixing velocity and energy input are usually tapered off as the size of the floc increases and come to rest against a barrier • It Flocculation Sedimentation SlideShareFlocculation / Sedimentation Pilot Module S500 Module consists of a feed pump, three stage rapid mix, three stage flocculation, inclined plate sedimentation, automated sludge removal collector, and four chemical feed systems Feed flow is maintained through automatic PID flow controlFlocculation / Sedimentation Pilot Module S500 IntuitechCoagulation, Flocculation and Sedimentation Dr John T O’Connor, PE Removal of Precipitates • Coagulation ( Chemical Mix) Destabilization of Suspended Particles • Flocculation (Slow Mix) Particle Collision and GrowthCoagulation, Flocculation and Sedimentation

Flocculation Sedimentation SlideShare

Aug 30, 2015 Flocculation Sedimentation 1 Operational Considerations Flocculation requires careful attention • mixing velocity and amount of mix energy • prevent the floc from tearing apart or shearing, the mixing velocity and energy input Flocculation / Sedimentation (Drinking Water Treatment) One of the common individual steps in removing contaminants from drinking water is the flocculation process During this process synthetic organic polymers, iron salts and alum are used to promote coagulation that helps combine particles into larger ones, which then settle out as sedimentFlocculation Sedimentation Tanks Water Tank Mixing SystemsFlocculation and sedimentation are technological processes used by Veolia Water Technologies South Africa (Veolia) within water treatment cycles to make water safe to drink or for water reuseFlocculation and sedimentation cannot occur without coagulation, and some of Veolia’s patented Hydrex® water treatment chemicals are used to facilitate all of these processesFlocculation and Sedimentation Water TreatmentFlocculation / Sedimentation Pilot Module S300 Module consists of a feed pump, three stage rapid mix, three stage flocculation, inclined plate sedimentation, automated sludge removal collector, and five chemical feed systems Feed flow is maintained through automatic PID flow control Mixers are variable speed with direct entry of mixing Flocculation / Sedimentation Pilot Module S300 IntuitechView HW 4 Water Treatment ( Mix, Floc, Sed)Solutionspdf from SCIENCE 204 at Glendale Community College INTRODUCTION TO ENVIRONMENTAL ENGINEERING CEE 361 Fall 2020 MBoyer ASU School forHW 4 Water Treatment ( Mix, Floc, Sed)Solutionspdf

Lecture 5: Coagulation and Flocculation

In practice the coagulation process involves a rapid mixing, flocculation, sedimentation and filtration step Some of these steps are sometimes combined in water treatment practice JAR TESTS The selection of a coagulant requires the use of laboratory or pilot plant coagulation studiesCoagulation and Flocculation in Water and Wastewater Treatment Coagulation and flocculation are an essential part of drinking water treatment as well as wastewater treatment This article provides an overview of the processes and looks at the latest thinking Coagulation and Flocculation in Water and Wastewater Treatment Overview Cleveland Water has a comprehensive treatment process—amongst the finest in the country—involving screens to remove large debris, rapid mix, flocculation, sedimentationWater Treatment Cleveland Water DepartmentCoagulation, Flocculation, Sedimentation 1 The design flow for a water treatment plant (WTP) is 1 MGD (38x103 m3/d) The rapid mixing tank will have a mechanical mixer and the average alum dosage will be 30 mg/L The theoretical mean hydraulic detention time of the tank will be 1 minute Determine the5 points total for CEE 371 Fall 2009 Homework #6 Then the water is mixed more slowly for a longer time period, mimicking the flocculation basin conditions and allowing the forming floc particles to cluster together Finally, the mixer is stopped and the floc is allowed to settle out, as it would in the sedimentation basinjartestlabreportdocdoc TITLE JAR TEST 10

AquaFLOC Filter Tech Systems

The three process stages within the aluminum module are Flocculation, Sedimentation, and Filtration Singletrain AquaFLOC Package Treatment Plants are custom designed to treat flows from 20 GPM to over 1 MGD Because good chemical mixing is an important accompanying step to the threestage treatment process, the FilterTECH Aqua MIX inline Flocculation or gentle agitation results from velocity differences or gradients in the coagulated water, which causes the fine moving, destabilized particles to come into contact and become large, readily settleable flocs It is a common practice to provide an initial rapid (or) flash mix for the dispersal of the coagulant or other chemicals Mixing, Coagulation Flocculation

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