Download e-book for iPad: Development of an environmental impact assessment and by Sabine Latteman

By Sabine Latteman

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Read or Download Development of an environmental impact assessment and decision support system for seawater desalination plants PDF

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MF membranes are capable of filtering suspended particles such as sand, silt, plankton and bacteria from the feedwater, while UF membranes also remove some viruses and high molecular weight dissolved organics [5]. Although UF/MF systems are nearly 100% efficient in terms of particles and microorganisms removal, they are much less efficient in removing dissolved organic matter [51]. While most SWRO membranes have a spiral wound configuration, UF/MF membranes are typically hollow fibers or small capillaries.

Horizontal radial wells with a vertical caisson and horizontal radial collectors embedded in the permeable onshore sediments. Horizontal drains, drilled horizontally from a central point on land into the offshore sediments (horizontally drilled/directed drains, HDD). Infiltration galleries where the natural sediments are not sufficiently permeable, which consist of perforated pipes arranged in a radial pattern in the onshore sediments, and which are constructed by excavation of sediments, refilling with coarse, more permeable material, and covering by natural sediments.

Favorable conditions for subsurface intakes are geologic formations with a high transmissivity and a certain sediment thickness, whereas unfavorable conditions include sediments with high volumes of mud and a low degree of ‘flushing’ [48]. Biofilters often produce a better feedwater quality than open intakes as the water is typically characterized by lower and less variable amounts of organic carbon (DOC and AOC), suspended solids, nutrients and microorganisms, and hence by a lower fouling potential [38].

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