This new edition has been published in a particularly critical background in terms of water problems: scarcity and quality degradation of water resources. There is no doubt that much progress has been achieved in terms of international exchanges and of the publication of reference documents and this progress has laid the institutional, financial and technical foundations for resolving problems that exist throughout the world: in the South, the need to provide many populations with drinking water and to treat wastewater; in the North, taking stock of the new territorial schemes that are emerging, with towns that continue to extend, industrial and agricultural operations that are consuming more and more of this precious resource, discharges into the natural environment that durably contaminate waterways and aquifers. More than ever, each has his role to play according to his field of expertise. Since , the men and women of SUEZ are specialist of the water treatment. These experts design, construct and operate drinking water production plants as well as reverse osmosis desalination units, plants used to remove pollution and reuse wastewater, and for treating sludge produced by the wastewater treatment system. Each edition of the Water Treatment Handbook has formalised this expertise, making it state-of-the art.
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Full Name Comment goes here. Are you sure you want to Yes No. Zahra Asghari , M. S Student of Environmental Engineering.
No Downloads. Views Total views. Actions Shares. Embeds 0 No embeds. No notes for slide. Backwashused to replace several stages of conventional treatment. The Timecompactness of membrane processes allows the construction Clogging is due to the formation of a colloid deposit on theof small-sized plants and modular processes can be installed in membrane surface, the adsorption of varied solutes in the pores,a wide range of plant sizes.
These fibres are then groupedThe physical barrier created by membranes makes it possible into modules that are easy to backwash. In addition, the quality of the both ends of the fibres. The modules are Air outlet bundle 2. The permeate iscollected under a vacuum in the grooves of the plates. The platesprovide mechanical support to the membranes and drainageof the permeate.
The plates supporting the membranes arealso assembled in compact modules. The arrangement of themodules allows parallel circulation. Accordingly, groups of unitsof up to m2 surface area can be formed. In additionto its exceptional rejection quality, the highly compact size of After straining through a fine mesh, the water to be purifiedMBR units is a decisive advantage for this technology, especially is sent to a reaction tank where it enters into contact with ain situations of overwhelming location and civil engineering purifying bacterial mass.
The membranes are immersed into theproblems. The biological liquor is filtered by suction through the ultrafiltration membranes with the use of a pump or simply through the hydraulic head on the membrane.
The biological liquor is circulated of the state of the sludge and its sludge index since the between the two tanks. L-1 since the clarifier is no longer needed. The quality of the treated water is excellent in terms of suspended solids and turbidity. Compared to the traditional activated used in this in modules. The vertical In filtration, that is, influence on oxygen transfer.
This leads to a specific electrical flatsheet two-module assembly via filtration from consumption, expressed in kWh. Filtration is done by suction, by action of a transmembrane The table below is a summary of the expected values with thispressure of less than 0. This involves injecting a chemical solution into the membrane Turbidity NTU 1pocket; leaving the solution to act for 2 to 4 hours, then rinsing COD mg.
BOD mg. L—1 1 NT mg. This is a fundamental stage for the proper functioning of the In addition, because of the small size of the basic elementfiltration unit.
The minimum required is filtration through a grid with easily integrated into an existing plant. The activated sludge tank generates an effluent favourable formembrane filtration. The higher concentration of sludge and the use of membraneshowever, introduce significant differences into the sizing.
In contrast, barring mandatory standards in total nitrogen, denitrification is optional, because unlike the conventional process, there is no risk of sludge backing 4. L-1 5 Distribution COD mg.
L-1 10 NGL mg. The possibility of superimposing Toray flatsheet membranes has enhanced the highly compact size of the facility and allowed the townto design a low-profile plant that blends into the environment. You just clipped your first slide!
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Degremont - Water Treatment Handbook
Volume 1 1. Water, a fundamental element. Treatment, what type of water and why? Basic phsyysical-chemical processes in water treatment. Basic biological processes in water treatment. Methods and means of analysis..
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