Flocculation design free download as powerpoint presentation. Practical wastewater treatment is designed as a teaching and training tool for chemical, civil, and environmental engineers. Flocculation by bridging or charge neutralization coagulation, however, are not mutually exclusive. Ebook coagulation and flocculation in water and wastewater. Pitching is adding yeast to wort to start fermentation. Pdf creaming and flocculation of oilinwater emulsions. Flocculation, in the field of chemistry, is a process in which colloids come out of suspension in. With no added electrolyte, depletion flocculation was observed at high values of 01. Depletion stabilization and depletion flocculation sciencedirect. It is possible for flocculation to happen due to combined charge neutralization and bridging effects, as is the case with high molecular weight polyelectrolytes. Flocculation as a lowcost method for harvesting microalgae for bulk.
From my course ees 3030, water treatment systems, in the department of environmental engineering and earth sciences at clemson university. Read depletion flocculation and thermodynamic incompatibility in whey protein stabilised ow emulsions, food hydrocolloids on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. Manufacturing processing mechanistic studies of cane mud flocculation e. Depletion flocculation in dispersions of sterically. Since india already receives high doses of ultraviolet uvb radiation, and is at the threshold go to speak, effects of ozone layer depletion could. Depletion flocculation in dispersions of stericallystabilised particles soft spheres a new approach is described for calculating the depletion interaction in systems of stericallystabilised particles soft spheres plus added free polymer.
Different time regimes in the development of the reduced scattering coefficient. Cheese some chymosin become adsorbed onto paracasein and transferred into cheese. Groundwater and surface water contain both dissolved and suspended particles. It can also be shown that there is a repulsive interaction between the two layers of dextran. Coagulation and flocculation prepared by husam alnajar the islamic university of gaza environmental engineering department water treatment eenv 4331 colour in water. Coagulation and flocculation constitute the backbone processes in most water and advanced wastewater treatment plants. Water treatment plant waste sludge disposal is dealt with in considerable detail, in an appendix devoted to this subject. Coagulation, flocculation and clarification of drinking water. These data correlate well with the depletion flocculation predicted for the lower concentration and the depletion stabilization predicted for the higher dextran concentration. Depletion flocculation and depletion stabilization of erythrocytes. Stability against demixing, rheology and microstructure of emulsions that were. Depletion stabilization and depletion flocculation suppression of depletion flocculation in oilinwater emulsions. 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. Based on an aiche training course, developed and taught by the author, this manual equips readers with the skills and knowledge needed to design a wastewater treatment plant and handle various types of industrial wastes.
We study the effect of the addition of a free nonadsorbing polymer xanthan gum on the st. Their objective is to enhance the separation of particulate species in downstream processes such as sedimentation and filtration. Pdf depletion flocculation in colloidal dispersions. Flocculation behavior of asphaltenes was monitored as a function of added precipitant nheptane to solutions of suspended asphaltenes and naphthenic acids, using dls and nir techniques.
Flocculation is seen as a promising lowcost harvesting method. Creaming and flocculation of oilinwater emulsions containing sodium caseinate. Bridging and depletion flocculation of synthetic latices induced by polyelectrolytes. Depletion flocculation in dispersions of stericallystabilised particles. The effect of addition of free polymer to sterically stabilised dispersions, i. Powerpoint is the worlds most popular presentation software which can let you create professional depletion of ozone layer powerpoint presentation easily and in no time. Ramavandi, 2014 ramavandi, 2014evaluated the coagulation potential of fcefecl3inducedcrudeextract obtained. Suspended particles vary in source, charge, particle size, shape, and density. Depletion flocculation practical solubility science. Depletion flocculation modelled in prof steven abbotts practical solubility science apps. Depletion and decline curve analysis in crude oil production. Depletion flocculation and thermodynamic incompatibility. Steric stabilisation and flocculation by polymers polymer journal.
There follows, during the flocculation step,an increase in the size of the particlespresent in the water phase resulting in the formation of flocs. Nearly 90% of earths ozone is in the stratosphere and referred to as the ozone layer. Rheological investigations on the creaming of depletion. Depletion flocculation by the free pll after saturated.
Invaluble for water scientists, engineers and students of this field, coagulation and flocculation in water and wastewater treatment is a convenient reference handbook in the form of numerous examples and appended information. Waste water treatment by coagulation and flocculation. Flocculation is a process in chemistry wherein colloids are extracted from suspensions which then take the form of flake or floc. Coagulation and flocculation in water and wastewater. Coagulation and flocculation in water and wastewater treatment provides a comprehensive account of coagulation and flocculation techniques and technologies in a single volume covering theoretical principles to practical applications. Coagulation and flocculation are used to separate the suspended solids portion from the water. Depletion flocculation in colloidal dispersions depletion flocculation in colloidal dispersions jenkins, paul. Flocculation by depletion and bridging was induced by addition of the polysaccharide carboxymethylcellulose cmc to emulsions that were stabilised by lactoglobulin lg at ph 6. Pdf waste water treatment by coagulation and flocculation. Bridging and depletion flocculation of synthetic latices. Author links open overlay panel kunio furusawa a miki ueda a takeshi nashima b.
The explanation of depletion usually involved a diagram showing the polymer chains as little spheres that are unable to get close to the particles when, by chance, the two particles happen to be near each other. Thoroughly revised and updated this new edition has been progressively modified and increased in scope to cater for the requirements of. The very same result can be derived using the kirkwoodbuff solution theory. Pdf coagulationflocculation in dewatering of sludge. Words such as pitching, attenuation, and flocculation take on special meaning to brewers. This volume details the thermodynamics and kinetics of the adsorption of surfactants and polymers on solids, as well as coagulation and flocculation mechanisms demonstrating the applicability of the newest theoretical approaches on practical systemswritten by over 15 international experts in the field, coagulation and flocculation. Coagulation, flocculation and clarification of drinking water terry l. Zouboulis division of chemical technology, department of chemistry, aristotle university of thessaloniki, gr54124, greece. The ozone layer was discovered in 19 by the french physicists charles fabry and henri buisson.
It is shown that an attractive interaction arises from depletion of surfactant micelles and leads to a fluidsolid phase transition. Chapter 8 coagulation, flocculation, and precipitation 229 8. Free download water wastewater calculations manual. Flocculation and coalescence of oilinwarer emulsions volume 248 j. Another possible mechanism for particle aggregation is called depletion flocculation. Depletion flocculation in colloidal dispersions science. Origins of depletion flocculation the first experimental observation of depletion flocculation was reported by traube 2, whilst investigating the creaming of natural rubber in the presence of water soluble polymers. Depletioninduced flocculation of concentrated emulsions. An approximate theory of depletion stabilization and depletion flocculation i. An earlier pragmatic theory for calculating the interparticle interaction energy between two stericallystabilised particles, in the presence of free polymer and. Depletion flocculation in colloidal dispersions, advances. In the asakuraoosawa model for depletion forces, the change in free energy imposed by an excluded cosolute, is. Colloids and the depletion interaction, volume 833. Delft university of technology flocculation and consolidation of.
Flocculation free download as powerpoint presentation. Depletion flocculation and depletion stabilization of. Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent. Coagulation and flocculation in water and wastewater treatment third edition start download portable document format pdf and ebooks electronic books free online rating news 20162017 is books that can provide inspiration, insight, knowledge to the reader. Flocculants, with their very high molecular weights long monomer chain and their charge content, fix the destabilized particles and aggregates along the polymer chain. Pdf depletion flocculation in colloidal dispersions researchgate. This helps you give your presentation on depletion of ozone layer in a conference, a school lecture, a business proposal, in a webinar and business and professional. Flocculation and coalescence of oilinwarer emulsions. However, although depletion may also be an important driving force in salivainduced flocculation, the required mucin concentration seems to be. It contains high concentrations of ozone o3 relative to other parts of the atmosphere. This knowledge will provide a basis for understanding the needs of the.
Serum separation and structure of depletion and bridging. They consist of surfactantfree polystyrene sulfate latex. Several aspects of pgminduced flocculation, measured by microscopy, particle size analysis, demixing experiments and rheology pointed to depletion flocculation as the main mechanism of flocculation. Coagulation is a water treatment process that causes very small suspended particles to. Below 7% dextran, the concentration of free dextran is higher than the adsorbed concentration. Pdf free download water wastewater calculations manual. This followed by description of the methods that can be applied for studying steric.
The ozone layer refers to a region of earths stratosphere that absorbs most of the suns uv radiation. Consideration is given to the behaviour of polymers in solution in relation to the. Depletion flocculation was observed at higher free polymer concentrations. This can take place spontaneously or may be brought about by adding clarifying agents. Download coagulation flocculation process for produced water treatment book pdf free download link or read online here in pdf. Ozone absorbs a band of ultraviolet radiation called uvb. The ozone layer is mainly found in the lower portion of the stratosphere. Crees sugar research institute, australia abstract a series of partially hydrolysed polyacrylamide flocculants was evaluated in batch settling tests on limed cane juice. Example problem for designing a flocculation basin. Pdf the destabilisation of colloidal dispersions by free. Coagulation and flocculation process fundamentals 1 coagulation and flocculation. This is consistent with the model of depletion flocculation, in which the. Coagulationflocculation process for produced water.
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