Treatment of textile effluents after dyeing cotton with azo dyes (Polish)

Details are given of a method of treating dyeing effluents by reducing their colour levels or decreasing their COD after dyeing cotton with direct azo dyes.

Recommendations for the treatment of wool dyeing effluents

Available methods for the treatment of effluents from wool dyeing are described. The International Wool Secretarist has assessed precipitation, adsorption, biological degradation, oxidation, reduction solvent extraction and electrochemical treatment. Preliminary screening and flow and pH balancing, followed by a chemical precipitation pro..

Sunflower stalks as adsorbents for color removal from textile wastewater

Sunflower stalks as adsorbents for two basic dyes (Methylene Blue and Baic Red 9) and two direct dyes (Congo Red and Direct Blue 71) in aqueous solutions were studied with equilibrium isotherms and kinetic adsorptions were studied with equilibrium isotherms and kinetic adsorptions. The maximum adsorptions of two basic dyes on sunflower st..

A dyeing machine with reversible dye spouter

The dyeing machine claimed has a cylindrical casing which is divided into top and bottom fabric holders. An operator feeds fabric past a dye spouter which pushes the fabric past screens, through the parallel bars of which excess dye drips into a cotainer. Similarly, fabric is fed past another spouter. The fabric ends are connected, permit..

S.A.T.E. DVS dosing system (Italian)

This revolutionary system has been developed by SATE of Prato for the dosing of acid and basic auxiliaries emulsified powder and liquid dyes of various densities for finishing processes. The system is covered by 4 international patents. Speed, safe dosing, flexibility, environmental copatibility and ease of operation are the strengths of ..

Carbonization and dyeing problems (Italian)

The article examines the secondary chemical reactions which accompany carbonization and suggests wasy of optimizing the process to achieve a better dyeing result. Carbonization is a process designed to remove vegetable matter from woollen fabric. The process involves impregnation with sulphuric acid and it was shown that the sulphuric aci..

Studies on toxicity of viscose rayon factory effluents. I. Effect on water

Physicochemical analysis of effluent samples revealed that the effluent was deep yellow in colour with wool pulp odour. It had high levels of BOD, COD, nitrites, phosphates, iron, zinc, oil and grease. The effluent was completely devoid of dissolved oxygen and miroogranisms. When the effluent mixed with the river water, the characteristic..

Processing aspects in the use of vacuum extraction for effluent treatment (German)

In the present study, the author investigates the decisive factors influencing the hydroextraction process and discusses their results. Vacuum extraction produces good to very good hydroextraction effects. These effects are influenced to a greater or lesser extent by both setting parameters of the vacuuming equipment as well as the textil..

Aero-Dye machine for lyocell finishing (German)

This article describes the work of H. Krantz Textiltechnik GmbH in Wurselen who have carried out numerous tests using its Aero-Dye machine for the finishing of lyocell. This included a sixmonth testing period at Courtaulds T and A wardle in Leek, England where the Aero-Dye machine was tested using the lyocell fibre, Tencel.

Variety of finishing with the aerodynamic system (German)

The following article presents the numerous possibilities offered to the textile finisher by the jet dyeing machine incorporating the latest technology: the Then-Airfolw AFS with its aerodynamic system. Of particular current interest are the various modifications with respect to coloration, surface appearance and handle which are possible..