Purification and recycling of waste water from dyeing and printing

Artificial polymeric membranes can be used to purigy and recycle polluting waste water and to concentrate reusable products. The paper describes the membrane processes of ultrafiltration and inverse osmosis and discusses the purification and recovery of waste water in the textile sector. The processes are illustrated in diagrammatic form ..

Color removal from textile plant effluents

Textile plants, particularly those involved in finishing processes, are major water consumers and the source of considerable pollution. The American and European directives on effluent quality to be issued in coming years will be increasingly restrictive; conventional treatment lines and discharge into municipal systems will no longer be ..

New method of effluent treatment

A mechanical/chemical method of treating dyeing effluents is described. Disperse, reactive, sulphur and azo dyes are degraded, depending on the adsorption means used. Several noxious substances in the effluent are reduced simultaneously. Heavy metals are also eliminated in addition to decolourizing and COD and BOD. Aromatic and chlorinate..

Recent developments in effluent purification/colour stripping

Treatment methods for dyehouse effluents are reviewed. Oxidative dyestuff destruction by UV light or a combination of UV light and hydrogen peroxide and by electrochemical processes is discussed. Other processes considered include selective dyestuff elimination by complex formation, adsorption, ion exchange, column extraction and wet oxid..

Stable free radical formation in photofading of reactive-dyed cotton fabrics in the presence of finishing agents

Stable free radicals have been detected in reactive dye/cellulose systems. So far their role has not been clarified. Location of the artificial-light-generated stable free radicals has been detected by electron resonance spectrometry. Photofading was evaluated by determining the colour difference and changes in optical density. Results sh..

Colour quality as the criterion in ecological dyeing of textiles

The primary task of each production is to care for our environment and to improve the quality of life. Finishing is one of the most ecologically critical processes because of the wide range of materials, textile auxiliaries, chemicals and thickeners which are used daily in the chemical part of the textile production. This paper is a contr..

Development of the High Efficiency Stenter and Other Versions of the Drying Chambers: Part 2

Development of the high efficiency tentering machine and other versions of drying chambers occurred due to the increasing costs of energy in the 1970s. Major design improvements implemented in the 1970s. Major design improvements implemented in the one to one counter type tentering machine include symmetrical arrangements of nozzle sets, ..

Today's Principles of Dyeing Cotton. Part One.

The growing popularity of cotton fabrics has resulted in greater consumer demand for quality and uniqueness. Dyers are under pressure to produce a broader variety of colors and decorative effects on cotton fabrics, often in lot sizes ill suited to their d

Criteria for the Ecological Comparison of Dyeing Processes Using Cotton Dyeings as an Example.

Previous research established relationships between dyeing formulations and the quantity and type of pollutants in dyeing effluents. The total effluent parameters (CSB values) quantify the total load introduced during dyeing and the load removed during th

Ultraviolet Light Hydrogen Peroxide System for Decolorizing Spent Reactive Dyebath Waste Water.

Researchers at Auburn University investigated the decolorizing of wastewater from reactive dyeing plants with ultraviolet radiation in the presence of hydrogen peroxide. The experiments tested both batch and continuous circulation methods of wastewater tr