Removing Acid Dyes From Textile Wastewater using Biomass for Decolorizastion

Biomass treatment is one of the oldest methods available for the treatment of dyehouse effluent. A study critically examined recent developments in the use of biomass for decolorization of dyehouse water and removal of acidic dyes. Biomass decolorizes textile wastewater by adsorption and ion exchange mechanisms. Decolorization and dye ads..

Water and Energy Savings in Continuous Carpet Dyeing.

The high costs of water, electricity, and natural gas are a major problem for the carpet dyeing and printing sector. The level of consumption by conventional carpet dyeing and printing lines is very high. Prewashing use a signifcant of the total water consumed. Streategies to reduce this consupmtion include the sue of a water flow meter a..

Reuse of Processing Water

Reuse of process water optimizes water utilization, reduces process costs, and improves environmental compatibility. A single-stage cotton pretreatment process reuses bleaching and rinsing bathes in a batch process. The procss comprises three chemical preparation tanks, a fully automatic chemical feeding system, and electronic control. An..

Effect of Light on Dyeing and Textile Substrates, Part 2. Photodegradation of Dyes and Natural Fibers.

Part Two in an examination of the effects of light on dyeing and textiles focuses on the photodegradation of dyes and natural fibers. In almost every case, color degradation occurs due to oxidation. For most colorants, the rate of degradation is higher in oxygen than other gases, and almost nonexistent in nitrogen or hydrogen. An overivew..

Separations Techniques for Recovery and-or Removal of Toxic Metals from Spent Textile Dyebaths.

Researchers at the Pacific Northwest Laboratory have investigated two approaches to removing and recovering toxic metals from dyes in textile wastewater. One approach reacted or destroyed the organic fraction of the dyes and released the metals to make them amenable to such conventional separation techniques as ion exchange. Rapid Thermal..

Design of Dyehouse Wastewater Recycling Plants.

The appropriate technology for separating flocculants in dyehouse wastewater depends on the level of pollutants in the water, the availability of space, and economics. If enough space is available and initial construction costs are not prohibitive, the sludge blanket setting tank is suitable for most applications. The advantages of the sl..

Potential of Treating Dyehouse Waste Water Economically.

The economics of wastewater tratment in cotton dyeing plants can be improved by separating the flow from each machine or similar groups of machines and by improving the design of sludge disposal areas. A feasible wastewater tratment scheme involves the separate discharge of dye liquors, rinses, and reduction clearing liquids. This method ..

Reducing Water Pollution during Textile Printing by Production Integrated Measures. Part 2.

Part 2 of an operations research analysis of production control and materials handling techniques in a textile printing plant focuses on the environmental effect of production integrated measures. The analysis shows that the optimization of materials flow conditions can significantly reduce the level of toxic by-products emitted during pr..

Reclamation of surfactants from salt containing industrial effluent

This article reports on the study to remove a low salt content surfactant from effluent containing common salt. Details of an industrial pilot plant are given, with economic consideration and textile industry applications discussed.

Source Reduction of Pollutants from Textile Processing Waste Water.

Research into the source reduction of pollutants from textile processing wastewater involved studies of the use of ozone to decolorize dyebath water, the decolorization of dyes with ultraviolet (UV) light and hydrogen peroxide, filtration, singlet oxygen bleaching of cotton, and the electrochemical removal of color from reactive dyeing wa..