Use of ion-selective membrane electrodes in determination of the dye solution concentration with potentiometric titration

A method for directly measuring the dye monomer concentration in solution is discussed in relation to acid dyes.

Treatment of textile wastewater by electrochemical method

The treatment of dyeing/finishing effluents by an electrochemical method is discussed. Results are evaluated in terms of colour (turbidity) and chemical oxygen demand reductions. The method is shown to be quite effective and is highly competitive as an alternative way of treating textile effluent.

Source-reduction technique to control effluent load in reactive dyeing

Reactive dyes are used on cellulosic fabrics to achieve dyeings at reduced cost and with satisfactory fastness properties. This involves large amounts of electrolytes and alkalis, which affect the nature of the effluent. It is shown that sodium chloride cannot be replaced by calcium chloide because it has insufficient capacity to exhaust ..

Photofading mechanism of arylmethane dyes on real silk

The effects of amino acids and their yellowing substances on the photofading of arylmethane dyes on real silk are investigated. The infuluence of oxygen, pH, the wavelength of the light and nickel salts is also considered. Tryptophan and tyrosine accelerate photofading of the arylmethane dyes; it is a photo-oxidation process and external ..

Machinery for scouring and finishing of pure wool and wool blends

The Folatex scouring/milling machine, the Lavanova continuous scouring machine, the Sperfix boiling and fixation machine and the Rotordry continuous cylinder drying machine are all briefly described.

Dyeing and finishing of polyester microfibres

Various pretreatments and drying and heat setting procedures are discussed in relation to polyester microfibre fabrics. Developments in disperse dyes are examined and dyeing machines are considered. Both mechanical and chemical finishing treatments are outlined.

Treatment of textile waste effluents by ozonization and chemical coagulation

The treatment of dyeing/finishing effluents is examined. Ozone treatment is capable of decomposing highly-structured dye molecules into smaller ones which are easily biodegraded in an activated sludge process. Hence a combination of ozone treatment, chemical coagulation and activated sludge processes may be a very effective means for deal..

Adsorption of disperse dye by various adsorbents

Powdered activated carbon, molecular sieves, activated alumina, sawdust, diatomite and granular activated carbon are used as absorbers in the study of treating dyeing effluents by the absorption method. C.I. Disperse Red 60 is used in the investigation COD removal efficiency is found to vary considerably: here powdered activated carbon an..

Recycling of the water in textile finishing. II

Dyeing with reactive dyes is examined and the recycling of the effluents to recover the process water is discussed. For part I see abstract 93W/04026.

A model waste water treatment plant for a textile process house

A case history of the setting up of a wastewater treatment plant in Switzerland at a textile processing plant carrying out mercerizing/causticizing, singeing, dyeing, printing and finishing of 600,000m/month is presented. The plant decolourizes dyehouse wastewater, reduces organic loads by 40-50％, recycles some wastewater for washing, an..