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60 PRETREATMENT OF ROTOGRAVURE PLATING
WASTEWATER
David L. Nutini, General Manager
RNK Environmental, Inc.
Covington, Kentucky 41017
Riley N. Kinman, Professor
Department of Civil and Environmental Engineering
University of Cincinnati
Cincinnati, Ohio 45221
INTRODUCTION
A treatability study was conducted to determine the best pretreatment design configuration for a
new Rotogravure cylinder plating system facility. This system is the first of its kind in the United
States. Since many of the chemicals used in the processing were proprietary and specifically formulated for this system, exact treatment of the wastewater from the process was questionable. Known
primary pollutants in the system consisted of copper, chromium, and toluene.
The objective of this study was to determine the most efficient and economic pretreatment system
design. This included wastewater treatment and treatment of residuals (sludge) from the pretreatment
process. Two treatability methods were studied: (1) physical-chemical treatment system and (2)
reverse osmosis treatment system. A stabilization/solidification method was studied to handle the
heavy metal sludge.
METHODS AND MATERIALS
A temporary physical-chemical batch pretreatment system was set-up in April 1990. The initial
design of this treatment plant is shown in Figure 1. The system consisted of two in-floor sump tanks
(250 gal), each of which pumped to their own holding tank (300 gal). The wastewater was pumped to a
mix tank where the pH was adjusted with caustic or acid to around 8.3. Ferrous sulfate was added to
reduce the hexavalent chrome to trivalent chrome and precipitate out the metals. The wastewater was
mixed rapidly upon addition of the chemicals for about 5 minutes with a 2 minute slow mix. The
treated wastewater was then permitted to settle. The supernatant was siphoned off and discharged
•
5
-*-
Gravity Feed
(s i phonj,
Wastewater
Chemical Haste
Figure 1. Wastewater treatment plant design.
46th Purdue Industrial Waste Conference Proceedings, 1992 Lewis Publishers, Inc., Chelsea, Michigan 48118
Primed in U.S.A.
577
Object Description
| Purdue Identification Number | ETRIWC199160 |
| Title | Pretreatment of rotogravure plating wastewater |
| Author |
Nutini, David L. Kinman, Riley N. |
| Date of Original | 1991 |
| Conference Title | Proceedings of the 46th Industrial Waste Conference |
| Conference Front Matter (copy and paste) | http://e-archives.lib.purdue.edu/u?/engext,42649 |
| Extent of Original | p. 577-582 |
| Collection Title | Engineering Technical Reports Collection, Purdue University |
| Repository | Purdue University Libraries |
| Rights Statement | Digital object copyright Purdue University. All rights reserved. |
| Language | eng |
| Type (DCMI) | text |
| Format | JP2 |
| Date Digitized | 2009-11-24 |
| Capture Device | Fujitsu fi-5650C |
| Capture Details | ScandAll 21 |
| Resolution | 300 ppi |
| Color Depth | 8 bit |
Description
| Title | page 577 |
| Collection Title | Engineering Technical Reports Collection, Purdue University |
| Repository | Purdue University Libraries |
| Rights Statement | Digital copyright Purdue University. All rights reserved. |
| Language | eng |
| Type (DCMI) | text |
| Format | JP2 |
| Capture Device | Fujitsu fi-5650C |
| Capture Details | ScandAll 21 |
| Transcript | 60 PRETREATMENT OF ROTOGRAVURE PLATING WASTEWATER David L. Nutini, General Manager RNK Environmental, Inc. Covington, Kentucky 41017 Riley N. Kinman, Professor Department of Civil and Environmental Engineering University of Cincinnati Cincinnati, Ohio 45221 INTRODUCTION A treatability study was conducted to determine the best pretreatment design configuration for a new Rotogravure cylinder plating system facility. This system is the first of its kind in the United States. Since many of the chemicals used in the processing were proprietary and specifically formulated for this system, exact treatment of the wastewater from the process was questionable. Known primary pollutants in the system consisted of copper, chromium, and toluene. The objective of this study was to determine the most efficient and economic pretreatment system design. This included wastewater treatment and treatment of residuals (sludge) from the pretreatment process. Two treatability methods were studied: (1) physical-chemical treatment system and (2) reverse osmosis treatment system. A stabilization/solidification method was studied to handle the heavy metal sludge. METHODS AND MATERIALS A temporary physical-chemical batch pretreatment system was set-up in April 1990. The initial design of this treatment plant is shown in Figure 1. The system consisted of two in-floor sump tanks (250 gal), each of which pumped to their own holding tank (300 gal). The wastewater was pumped to a mix tank where the pH was adjusted with caustic or acid to around 8.3. Ferrous sulfate was added to reduce the hexavalent chrome to trivalent chrome and precipitate out the metals. The wastewater was mixed rapidly upon addition of the chemicals for about 5 minutes with a 2 minute slow mix. The treated wastewater was then permitted to settle. The supernatant was siphoned off and discharged • 5 -*- Gravity Feed (s i phonj, Wastewater Chemical Haste Figure 1. Wastewater treatment plant design. 46th Purdue Industrial Waste Conference Proceedings, 1992 Lewis Publishers, Inc., Chelsea, Michigan 48118 Primed in U.S.A. 577 |
| Resolution | 300 ppi |
| Color Depth | 8 bit |
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