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DYE WASTEWATERS ALTERNATIVES FOR BIOLOGICAL WASTE TREATMENT Dennis W. Weeter, Associate Professor Department of Civil Engineering The University of Tennessee Knoxville, Tennessee 37916 A. Gale Hodgson, Chemist Tennessee Department of Public Health Knoxville, Tennessee 37920 INTRODUCTION Textile mills are usually located in or near small- to medium-size communities in the southeastern states. There are three such textile mills located in a small community in Tennessee, and between them they make up the major portion of wastewater flow to their activated sludge wastewater treatment plant (WWTP). The WWTP is unable to reduce the suspended solids and color to an acceptable discharge level. One textile mill is interested in what action can be pursued to achieve an acceptable discharge level. This textile mill uses 6 dyes in their dyeing operation, the concentration of each dye being varied within the operation according to the intensity of color required. The dye wastewater is diluted to a 1:7 ratio within the mill and again diluted to a 1:3 ratio with the other textile mills and domestic wastewater at the WWTP. Because the available treatment is biological in nature and for economic reasons, the initial investigation will be by biological applications. The objective of this study is to evaluate the 6 dyes using biological applications. The dye will be investigated at concentrations above and below the ratios within the textile mill and at the treatment plant. The main concern of the study will be the removal of color and the organic loading associated with the dyes. The initial study was to evaluate the degradability of each dye by determining the amount of oxygen uptake by long-term biological oxidation processes. Each dye was analyzed for metal concentrations and the possible introduction of toxic or inhibitory ions. Bioadsorption of the dyes and color reduction was investigated by using both an acclimated and a nonacclimated sludge. LITERATURE REVIEW Treatment of wastewaters from textile dyeing operations are characteristically high in color and organic content. Most textile wastewater treatment plants employ an aeration- type wastewater treatment, which uses extended aeration periods to combat waste variability, hard-to-biodegrade compounds, high pH values and alkalinity, high chlorides, bleaches or oxidants, colloidal color, trace metals, and possible toxicants. Earlier work emphasized the removal of biochemical oxygen demand (BOD), but recently the major concern has shifted to the removal of chemical oxygen demand (COD), suspended solids (SS), color, and colloid size particles.
Object Description
Purdue Identification Number | ETRIWC1977001 |
Title | Dye wastewaters, alternatives for biological waste treatment |
Author |
Gabler, Robert C. Neylan, David L. |
Date of Original | 1977 |
Conference Title | Proceedings of the 32nd Industrial Waste Conference |
Conference Front Matter (copy and paste) | http://e-archives.lib.purdue.edu/u?/engext,26931 |
Extent of Original | p. 1-9 |
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 | 2009-06-30 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Resolution | 300 ppi |
Color Depth | 8 bit |
Description
Title | page001 |
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 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Transcript | DYE WASTEWATERS ALTERNATIVES FOR BIOLOGICAL WASTE TREATMENT Dennis W. Weeter, Associate Professor Department of Civil Engineering The University of Tennessee Knoxville, Tennessee 37916 A. Gale Hodgson, Chemist Tennessee Department of Public Health Knoxville, Tennessee 37920 INTRODUCTION Textile mills are usually located in or near small- to medium-size communities in the southeastern states. There are three such textile mills located in a small community in Tennessee, and between them they make up the major portion of wastewater flow to their activated sludge wastewater treatment plant (WWTP). The WWTP is unable to reduce the suspended solids and color to an acceptable discharge level. One textile mill is interested in what action can be pursued to achieve an acceptable discharge level. This textile mill uses 6 dyes in their dyeing operation, the concentration of each dye being varied within the operation according to the intensity of color required. The dye wastewater is diluted to a 1:7 ratio within the mill and again diluted to a 1:3 ratio with the other textile mills and domestic wastewater at the WWTP. Because the available treatment is biological in nature and for economic reasons, the initial investigation will be by biological applications. The objective of this study is to evaluate the 6 dyes using biological applications. The dye will be investigated at concentrations above and below the ratios within the textile mill and at the treatment plant. The main concern of the study will be the removal of color and the organic loading associated with the dyes. The initial study was to evaluate the degradability of each dye by determining the amount of oxygen uptake by long-term biological oxidation processes. Each dye was analyzed for metal concentrations and the possible introduction of toxic or inhibitory ions. Bioadsorption of the dyes and color reduction was investigated by using both an acclimated and a nonacclimated sludge. LITERATURE REVIEW Treatment of wastewaters from textile dyeing operations are characteristically high in color and organic content. Most textile wastewater treatment plants employ an aeration- type wastewater treatment, which uses extended aeration periods to combat waste variability, hard-to-biodegrade compounds, high pH values and alkalinity, high chlorides, bleaches or oxidants, colloidal color, trace metals, and possible toxicants. Earlier work emphasized the removal of biochemical oxygen demand (BOD), but recently the major concern has shifted to the removal of chemical oxygen demand (COD), suspended solids (SS), color, and colloid size particles. |
Resolution | 300 ppi |
Color Depth | 8 bit |
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