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β-Cyclodextrin exists as a white (colorless) powder or crystals. The density of its saturated hydrate crystal (βCD·12H 2 O) is 1.46 g/cm 3 . β-Cyclodextrin is moderately soluble in water and glycerin ; well soluble in dimethyl sulfoxide , dimethylformamide , pyridine , HFIP , and ethylene glycol ; and insoluble in ethanol and acetone .
Purification of the three types of cyclodextrins takes advantage of the different water solubility of the molecules: β-CD which is poorly water-soluble (18.5 g/L or 16.3 mM at 25 °C) can be easily retrieved through crystallization while the more soluble α- and γ-CDs (145 and 232 g/L respectively) are usually purified by means of expensive ...
Sedimentation (water treatment) Septic tank; Septic tank conversion [2] Sequencing batch reactor; Sewage treatment; Skimmer (machine) Slow sand filter; Stabilization pond; Supercritical water oxidation (SCWO) Thermal hydrolysis; Treatment pond; Trickle-bed reactor; Trickling filter; Ultrafiltration; Ultraviolet disinfection; Upflow anaerobic ...
Dissolved air flotation (DAF) is a water treatment process that clarifies wastewaters (or other waters) by the removal of suspended matter such as oil or solids. The removal is achieved by dissolving air in the water or wastewater under pressure and then releasing the air at atmospheric pressure in a flotation tank basin. The released air forms ...
An example for an anaerobic secondary treatment system is the upflow anaerobic sludge blanket reactor. Fixed-film systems are more able to cope with drastic changes in the amount of biological material and can provide higher removal rates for organic material and suspended solids than suspended growth systems.
These fine bubbles become dissolved into the liquid within the volute of the pump. The result of this process provides similar size bubbles to a dissolved air flotation system. The backpressure valve on the discharge piping can regulate the bubble size in a DGF pump. The bubble size ranges from 50 down to 1 micrometer or less.