Curing discharges

Alternative Methods of Curing. The presence of salt in hides and skins has been a problem for taimers. Moreover, the quantity of salt, usually 10—20% by weight in cured hides, is an environmental problem. In the discharge of the water from the rewet and washing, the soluble soHds are normally greater than 20, 000 mg/L. This amounted to 2000 4000 mg/L in the combined waste stream of the taimery. 

Warning signs to report to a physician (recurrent or difficult-to-cure infections, infections with malodorous discharge or bleeding)... 

This operation is also performed using machines. The cured plates are fed into the parting machine by mechanical means. The plates are parted in the machine and then collected when the operation is completed manually. The parted plates are thereafter stacked for use in battery assembly. More rejects are also generated in this section as well as some lead dust. The ventilation system in this area ensures that the lead dust generated is removed from the work area and discharged into the atmosphere through a baghouse filter. 

Uses/Sources. As an intermediate in the production of flame retardants, flavors, fragrances, and vinyl cyclohexene dioxide (which itself is used in the manufacture of epoxy resins) found in gases discharged during the process of curing ruhher in tire manufacturing. 

T0192 CURE International, Inc., CURE Electrocoagulation Wastewater Treatment System T0370 High Mesa Technologies, L.L.C., Silent Discharge Plasma T0617 PPC Biofilter, Biofiltration Systems... 

Excimer lamp Dielectric barrier (silent) discharge 172,222, 308 1-10 UV curing. Major R D... 

UV curing system with a barrier discharge excimer lamp. (Courtesy of Heraeus Noblelight.)... 

Continuous screw extrusion is another way to form PVC plastisol propellant into the desired size and cross-sectional shape. Simultaneous curing of the propellant is also accomplished. This process has been described fully by Rossen and Rumbel (9) and is only summarized here. Mixed propellant is fed from a casting pot into the feed end of a continuous worm-screw extruder which is fitted at the discharge end of the screw with a device for constricting propellant flow. The action of the... 

How can we minimize the damage to the environment Common sense says that prevention is better than cure. If one can use an environmentally friendly solvent in the processing step, the discharge of hazardous chemicals and the need for environmental post-treatment can be avoided. This is an approach that is currently being explored in polymer processing as well as in other manufacturing technologies (DeSimone et al. 1994). In the case of the... 

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