Water treatment. Machinery and chemical products for environmental protection (Italian)

The Italian company Hdrochem has reached an agreement with the German Firm Grun GmbH to sell the latter's transferring pump in Italy. The Grun pump which has a P-3000 motor is designed to transfer or remove neutral or corrosive liquids and liquids with low viscosity from drums and containers. The motor and the pump are designed for heavy-..

Treatment of dyehouse effluent with nanofiltration (German)

Dyehouse effluents from various textile mills and different dyeing processes were treated in a nanofiltration test unit. In this study, nanofiltration membranes from different manufacturers were tested. With respect to colour in the wastewater, the retent

Peracetic acid in textile finishing. IV. Oxidative decolorizing of dyehouse effluent with peracetic acid and UV light (German)

The oxidative decoloration of dyehouse wastewater with equilibrium peracetic acid or H₂O₂and UV light was investigated by on-line spectrophotomery. The UV-induced decloration time is one hour in the absence of an oxidant, it was shortened to about 6 minut

Ligninase-catalysed decolorization of synthetic dyes

Many synthetic dyes in industrial wastewaters are resistant to degradation in conventional biological treatment process. Decolorization of eight synthetic dyes including azo, anthraquinone, metal complex and indigo were examined in white-rot fungal cultru

Investigation into the effect of UV/ozone treatments on the dyeability and printability of wool

The effect of UV/ozone treatments on the surface and bulk properties of wool has been investigated. X-ray photoelectron spectroscopy indicates that the oxidative process causes extensive surface modification, while vibrational and electron spin resonance techniques show the formation of cysteic acid and free radical species. The beneficia..

Development of Printing and Dyeing Processes for an Ecological Acceptable Polypropylene Formulation.

This research project will adapt dyeable polypropylene for processing fibers with varying degrees of fineness while retaining their absorptivity toward disperse dyes. It will also define the appropriate disperse dyes that offer optimal fastness, fixation, and leveling at relatively low temperatures; elaborate complete printing and dyeing ..

Regeneration of the Textile Industry Waste Waters.

textile finishing wastewater effluent often has tensides, dyestuffs, and heavy metals. Researchers used different absorbents to eliminate the impurities from textile wastewaters. They investigated the role of natural aluminosilicates in a process of adsorption and ion exchange of heavy metals, dyestuffs, and tensides from water solutions...

Fixation of a Direct Dye on Cotton Using a Cellulose Thiocarbonate/Ammonium Persulphate System.

Researchers treated cotton fabric with thiocarbonate in a reaction with carbon disulfide in the presence of sodium hydroxide and dyed the fabric with a direct dye in the presence of ammonium persulfate under a variety of conditions. Alkali treated and unt

Comparison of Different Rinsing Processes in Short-Liquor Piece Dyeing Mechines.

Researchers compared batchwise rinsing, continuous rinsing with liquor circulation via the main pump, between two levels with liquor circulation by the main pump, and rinsing without circulation by the main pump. Using common salt to determine the rinsing effect eliminated the influence of substantivity. Batchwise rinsing achieved a unifo..

Drum Dyeing Route to a Rapid Response.

Although garment dyeing currently accounts for only 6 percent of textile dyeing, its importance in the manufacture of leisurewear and sportswear apparel is increasing. Garment dyeing reduces order and delivery times by approximately six weeks compared wit