NEW CONCEPT IN PIECE DYEING

Gaston County's Stanley Walker plece dyeing machine can process fabrics that are sensitive to crushing or tension in rope form. These fabrics incldue piles, velours, blends with spandex, and high-stretch fabrics. Because fabric circulation is independent of liquor movement in the return phase, low liquor ratios can be used. Fabric quality..

NEP COVERAGE RESEARCH.

The pretreatment of fabric using chitosan is discussed. Desized, scoured, and bleached fabrics were first treated in a jig with an aqueous solution containing 0.1 percent nonionic wetting agent for 5 minutes. Using the weight of fabric as a basis, 0.4 per

HOSIERY DYEING UNITS SHOW GREATER EFFICIENCY

At the 1992 IHE, newer versions of drum dyeing machines, featuring center-shaft injection to reduce the amount of agitation, were displayed by two firms: the Martint Equipment Company and Proll and Lohmen Maschlnen und Anlagan. Static dry systems for shee

Treatability of Water Soluble Azo Dyes by the Activated Sludge process.

The United States Environmental Protection Agency's Office of Toxic Substances evaluates submissions to the Premanufacture Notification process under Section 5 of the toxic Substances Control Act. Azo dyes represent a significant percentage of these submissions because of the demonstrated or suspected carcinogenicity of some of these dyes..

Targeting Reactive Dyebaths for Reuse.

A high salt content may permit recycling of reactive dyebaths. The value of the salt recovered may be more than $30 per 1,000 gallons of water treated. Estimates of the value of water savings, the avoided wastewater treatment costs, and heat energy returned to the dyeing process represent an additional $4.85 per 1,000 gallons of water rec..

Wastes from Manufacture of Dyes and Pigments. Volume 2. Azo Dyes and Pigments (Excluding Benzidine and Its Congeners)

A study of the manufacture of azo dyes and pigments identified several solid wastes with the potential to contain hazardous materials. These solid wastes included filter cake from clarification operations, wastewater treatment aolids, intermediates from d

Fate of Water Soluble Azo Dyes in the Activated Sludge Process.

Fate of Water Soluble Azo Dyes in the Activated Sludge Process, originally published in a 1991 issue of Chemosphere, related a study to determine the partitioning of these dyes in activated sludge. Azo dyes are important because some of the dyes, dye prec

Adaptation of Purification Plant Inoculum with Polyvinyl Alcohol

The adaptation of a purification plant inoculum can degrade polyvinyl alcohol (PVA) within three days using the Zahn-Wellens test and within 28 days using the Sapromat test. Elimination is greater than 90 percent. An increasing degree of substitution of ester groups progressively impendes PVA degradation. Although PVA degradation is expon..

Optimum Conditions for Microbial Degradation of Polyvinylalcohol in Waste Water.

Microbial degradation of polyvinyl alcohol (PVA) during wastewater treatment is dependent on the nature of the polymer and the wastewater system parameters. The important wastewater system parameters are microorganism time adaptability, sludge load, const

Investigation of Texile Dyebath Reconstitution and Reuse. Volume 2. Operations Manual

Dyebath reconstitution and reuse is one of a range of wastewater recycle and reuse technologies that permit textile finishing mills to decrease the volume of wastewater and the quantity of pollutants discharged. This technology has significant potential b