| Titre : |
Extent of solvents and chemical oxygen demand build-up in boothwater systems using waterborne paint |
| Type de document : |
texte imprimé |
| Auteurs : |
Sheila F. Kia, Auteur ; Devi N. Rai, Auteur ; Ronald L. Williams, Auteur |
| Année de publication : |
1996 |
| Article en page(s) : |
p. 87-95 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Ateliers de peinture industrielle
Composés organiques volatils
Eaux usées
Revêtements
Revêtements en phase aqueuse:Peinture en phase aqueuse
Solvants organiques
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
The real-time impact of waterborne paint for basecoat on the spray boothwater system was investigated by monitoring the paint spray systems at five automotive assembly plants for periods up to 555 days. The laboratory analyses of the boothwater samples were aimed at evaluating the extent of accumulation of organic material in boothwater. Among the five systems studied, the boothwater average total organic content in terms of chemical oxygen demand (COD) spanned from 3,300 to 16,400 ppm. For systems with a low boothwater replenishment rate and clean water start-up, the boothwater COD showed an almost linear increase with time. Among the systems, the boothwater contained less than 1,000 ppm organic solvents. The boothwater solvents originate primarily from the paint; the contribution from purge and the cleaning chemicals is small. For all the systems, the solvents in boothwater account for less than 26% of the boothwater COD. The balance of COD us contributed by nonvolatile organics such as paint resins and the organic polymers from the treatment chemicals, which are present in boothwater as fine particles (<0.45μm). |
| Note de contenu : |
- EXPERIMENTAL : Boothwater systems and paints - Boothwater sampling & analysis methods
- RESULTS : Individual solvents in boothwater - Total solvents in boothwater - COD & dissolved solids in boothwater - Reasons for the variability in boothwater composition |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18445 |
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 68, N° 861 (10/1996) . - p. 87-95
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