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  2. Silt density index - Wikipedia

    en.wikipedia.org/wiki/Silt_density_index

    The silt density index is a measure for the fouling capacity of water in reverse osmosis systems. The test measures the rate at which a 0.45-micrometre filter is plugged when subjected to a constant water pressure of 206.8 kPa (30 psi). The SDI gives the percent drop per minute in the flow rate of the water through the filter, averaged over a ...

  3. Dialysis disequilibrium syndrome - Wikipedia

    en.wikipedia.org/wiki/Dialysis_disequilibrium...

    The cause of DDS is currently not well understood. There are two theories to explain it; the first theory postulates that urea transport from the brain cells is slowed in chronic kidney disease, leading to a large urea concentration gradient, which results in reverse osmosis.

  4. Reverse osmosis - Wikipedia

    en.wikipedia.org/wiki/Reverse_osmosis

    Around half of this capacity was in the Middle East and North Africa region. [8] RO production train, North Cape Coral Reverse Osmosis Plant. In 1977 Cape Coral, Florida became the first US municipality to use RO at scale, with an initial operating capacity of 11.35 million liters (3 million US gal) per day. By 1985, rapid growth led the city ...

  5. Reverse osmosis plant - Wikipedia

    en.wikipedia.org/wiki/Reverse_osmosis_plant

    A reverse osmosis plant is a manufacturing plant where the process of reverse osmosis takes place. Reverse osmosis is a common process to purify or desalinate contaminated water by forcing water through a membrane. Water produced by reverse osmosis may be used for a variety of purposes, including desalination, wastewater treatment ...

  6. Membrane scaling - Wikipedia

    en.wikipedia.org/wiki/Membrane_scaling

    Membrane scaling is when one or more sparingly soluble salts (e.g., calcium carbonate, calcium phosphate, etc.) precipitate and form a dense layer on the membrane surface in reverse osmosis (RO) applications. [1] Figures 1 and 2 show scanning electron microscopy (SEM) images of the RO membrane surface without and with scaling, respectively.

  7. Hemodialysis - Wikipedia

    en.wikipedia.org/wiki/Hemodialysis

    Hemodialysis, also spelled haemodialysis, or simply dialysis, is a process of filtering the blood of a person whose kidneys are not working normally. This type of dialysis achieves the extracorporeal removal of waste products such as creatinine and urea and free water from the blood when the kidneys are in a state of kidney failure.

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