On-site processing

On-site processing is very suitable for plastics materials and, in addition to the existing practices, there have also been studies to increase the proportion of on-site processing in construction, i.e., rolls of crosslinked polyethylene (XLPE) foam with a range of thickness and densities can simply be cut to the size and applied on-site. 

In the earlier Nestehous , Concept House of Neste, Finland, the development of new on-site processing techniques were aimed at. Concrete casting moulds that stayed on the construction site were prepared from GFRP composites of polyester and they were used to prepare concrete rebars (prepared with concrete and PP fibres) used as the main load bearing material in the house. 

Plastic composite bridges are very successful examples of on-site production pultruded parts can be easily carried to the application site and processed (GFR resin - polyester thin-walled cellular modules were quickly assembled and bonded by epoxy-based adhesives on-site in a very short time in the Aberfeldy foot bridge). 

Joining of plastic pipes is shown to be done more effectively, economically and in a much shorter time on-site by linear vibration welding , rather than the conventional hot plate welding or electrofusion welding techniques. 

Hot applied sealants provide excellent bonding, high resiliency with a positive seal while ambient applied sealants are usually in the semi-cured state and can be one- or two-part. 

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TABLE 25-57 Factors That Should Be Considered in Evaluating On-Site Processing Equipment... 

Industrial use of cogeneration leads to small, dispersed electric-power-generation installations—an alternative to complete reliance on large central power plants. Because of the relatively snort distances over which thermal energy can be transported, process-heat generation is characteristically an on-site process, with or without cogeneration. 

Off-site disposal of regulated medical wastes remains a viable option for smaller hospitals (those with less than 150 beds). Some preliminary on-site processing, such as compaction or hydropulping, may... 

The great advantage of the absorption process over the synthesis of a by-product was its direct recovery of chlorine. Such a process or one that uses chlorine in another on-site process with steady demand is the ideal. More vigorous liquefaction is one approach to reducing the amount of chlorine value to be disposed of, and it has usually been chosen as the substitute for absorption. In this chapter, we discuss the use of gas-separation membranes as an alternative. 

Refining facilities reqnire significant volumes of water for on-site processes (e.g., coolants, blowdowns) as well as for sanitary and potable nse. Wastewater will derive from these sonrces (process water) and from stormwater runoff. The latter conld contain significant concentrations of petroleum product. 

Dichlorobenzidine is currently used in the produetion of insoluble dyes and pigments. Almost all 3,3 -dichlorobenzidine is now manufaetured outside the United States and is imported for on-site processing or for use as a reaetant to synthesize pigments. Processing means preparing a chemieal after its manufacture for commereial distribution either as the same physieal eompound, in a different form or physical state, or as part of another artiele (for instance, a mixture) eontaining the chemical (40 CFR 372.3). 

This is an emerging technology being researched at the U.S. Department of Energy s Pacific Northwest National Laboratory. To date, EBDP has only been tested in the laboratory, but field tests are expected in the future. Although the process is ex situ, the equipment can be transported for on-site processing. 

Recommendation 4-2. The Army should define the quantity and characteristics of anticipated nonprocess waste streams and evaluate options for the final disposition of each type of waste. On-site processes should be developed and demonstrated for treating all agent-contaminated wastes. Methods of representative sampling and characterization of wastes should be developed to verify that treated wastes are free of agent to below appropriate risk thresholds. 

Some refinery catalysts are regenerated repeatedly as part of the commercial process (e.g., FCC catalysts). In this case the regeneration facility is part of the on-site process. Regeneration can be performed with rental equip-... 

Product Concentration, and (10) Acid and Water Recycle. Each of these areas has major design problems the WTF supporting a fuel fabrication facility is similar, but without areas 1 and 2. In both cases, all subsystems are integrated so as to operate together in a single, on-site processing building. 

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