Moisture reduction

Use of Surfa.cta.nts, Although the use of steam to improve dewatering is consistently beneficial, the effects of surfactants on residual moisture are highly inconsistent. Additions of anionic, nonionic, or sometimes cationic surfactants of a few hundredths weight percent of the slurry, 0.02—0.5 kg/1 of soHds (50), are as effective as viscosity reduction in removing water from a number of filter cakes, including froth-floated coal, metal sulfide concentrates, and fine iron ores (Table 2). A few studies have used both steam and a surfactant on coal and iron ore and found that the effects are additive, giving twice the moisture reduction of either treatment alone (44—46,49). 

There are a number of commercially available surfactants that can be employed as an aid in filter cake moisture reduction. These reagents can be added to the filter feed sluriy or to the filter cake wash water, if washing is used. Since these reagents have a dispersing effect, flocculation may be required subsequently Typical moisture reduc-... 

PROCESS PARTICULATE MATTER—This arises from a variety of sources throughout the handling and processing of oil seeds and byproduct meal. Elevator losses as a whole usually average 2% to 3%. This loss is a combination of moisture reduction, seed spillage, and dust loss/emissions. The dust portion of the loss is a smaller absolute number however, it can create substantial challenges when measured as particulate air emissions. Additionally, a portion of these losses can manifest as water-bom contaminants in plant site rainfall mnoff. 

Non-enveloped viruses reduction Moisture reduction Moisture reduction Moisture... 

The moisture content of heartwood in softwood trees is reduced to a level much lower than that of normal sap-wood (2, 24), During the moisture reduction period, the membranes of bordered pits in sapwood fibers have a strong tendency to become aspirated. This situation, together with that of pit membrane incrustation, greatly reduces the natural permeability of heartwood tissue to liquids and gases. 

The separation of solids from liquids often involves at the same time the separation of solids from solids. In the so-called classifiers much used in Western ore mills the separation effected is watery sands from watery fines or slimes. The water content in the sands is of course very much less than in the slimes, the latter containing the bulk of the water fed to these devices. To reduce the water content in the slimes following their passage out of the classifiers they are often passed through thickening devices and the thick discharge from these is subjected to mechanical filter treatment and drying for further moisture reduction. 

A process of heating a substance to a high temperature below its melting or fusing point, causing the loss of moisture, reduction, or oxidation and the decomposition of carbonates and other compounds. 

Conditions recommended by the manufacturers for extrusion of specialty resin blends are listed in Table 10.23. For PEUPC blends Ultem LTX), drying is essential. Furthermore, for extrusion grades, adequate moisture reduction may take 3-4 times longer than for injection molding grades. Excessive die drool is one of several indications that the resin was not sufficiently dried, even though some moisture analyzers may indicate adequate dryness. 

Although the purpose of this chapter is primarily to discuss heated air dryers, some mention will be made about the four crop moisture reduction methods, usually called crop conditioning, as they are sometimes used in place of or in combination with heated-air drying. 

Maxbnnm retention Maximum production Maximiun Cake moisture reduction Maximum cake discharge Maximum life Maximum re ance to blinding... 

Hongxiaiig, 1991] refer to a cake moisture reduction to less than 25% as being necessary for effective cake discharge. Low moistures in variable chamber pressing of dyestuffs, metallic hydroxides and stearates followed the use of monofilament polyester cloth calendered to reduce the screen size to 30 pm [Reid, 1974], as mentioned above. Carleton and Heywood [1983] have discussed the fundamental aspects of filter cake properties and cake discharge mechanism. The effectiveness of discharge will dq>end on ... 

The cooking or moisture reduction zone where the food having a nonsticky surface and a relatively firm shape continues to loose moisture through steam emission and cooking. The... 

Meeso, N., Nathakaranakule, A., Madhiyanon, T., Soponronnarit, S., 2004. Influence of FIR irradiation on paddy moisture reduction and milling quality after fluidized bed drying. /. Food Eng. 65(2) 293-301. 

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