The textile industry (cotton printing and dyeing) clean production standards being as reference and green production full control in the whole process as the guiding ideology, the green evaluation indexes are formed and have better feasible manipulation.
The textile industry (cotton printing and dyeing) clean production standards being as reference and green production full control in the whole process as the guiding ideology, the green evaluation indexes are formed and have better feasible manipulation.
Consumption of water and energy (CWE)
The textile industry is one of the industry sectors consuming water largely. The main water consumption is generated from production technical processes including bleaching and boiling, dyeing, printing, finishing, washing of wool, reeling in a cocoon, etc. In addition, there is a large amount of water consumption coming from textile plant conditioners and staff living. Water consumption can be measured by ton per ten thousand.
image
Chemical fiber, cotton textile and printing and dyeing plants are also main energy consumption industries. At present, domestic main textile product per unit energy consumption is 40% higher than that of an international advanced level. Plants rough management results in not only numerous waste of resources, serious environment pollution but also high cost. Assessing water and energy consumption can help to lower production cost, save resource and reduce environment press. Energy consumption can be measured by tons of standard coal per ten thousand.
Treatment of wastewater, gas, and materials (TWWGM)
Wastewater mainly comes from textile and dyeing process. Textile wastewater contains natural impurities, organic matter of fat and asylum. Printing and dyeing wastewater contains organic matter of dyes, amylum, cellulose, lignin, detergent, and inorganic matter of alkali, sulfide and various salts. Waste gas mainly includes sulfur dioxide, fume, and dust, which generate during coal burning and pollute environment seriously. Waste materials mainly include offal short fiber coming from a chemical and mechanical action, waste yarn and waste materials during spinning and weaving production, corner or excess cloth during clothing cutting process. These waste materials are treated by burning or burying
which pollute environment seriously.
Control of harmful materials to human health (CHM)
During planting of natural fiber, chemical fertilizers and pesticides are used inevitably. Some poisonous substances and chemical residue will remain in the final products which cause crimes to people. Some dyes and auxiliaries such as antiseptics, preservatives, azo dyes, and formaldehyde, which are used during dyeing and printing production, have powerful toxicity too. These chemical substances may cause various hazards such as skin allergies, dermatitis, and respiratory discomfort.
This index evaluates poisonous substance contents of raw materials, semi-finished products, and final products. Oeko-Tex Standard 100 is the most authoritative standard system in the world. It tests properties of PH value, formaldehyde, insecticide, colorfastness, banned azo dyes aryl amine, etc.Raw material and accessories and end product are needed to reach Oeko-Tex Standard 100.
Advanced technology, product, and design idea (ATP)
This index includes three-second level indexes to evaluate the green level of production technology, new products, and design idea. In recent years, many new green production technologies, green fibers and environmentally friendly dyes and auxiliaries are used which can improve the green level of textile and clothing production chains and increase the added value. Green design of textile and clothing is a new esthetics field. Its design ideas play an important role in publicity and consumption. Currently, many international famous designers and brands of textile and clothing have used kinds of ways to express green design idea. For example, recycle old materials to create new products, use pure nature and no polluted raw materials to produce clothing, design simple and fresh styles, etc
Package consumption (PC)
Textile and clothing package is not only a larger consumption and environmental pollution. According to statistics, to an annual output of 900 million shirts, the paper consumption of shirt box will reach 180,000 tons which are equal to 1,260,000 trees. So it has significance to control packing costs and use degradable packing materials. This index has two second-indexes to evaluate package pollution degree (whether use materials of environmental protection) and resource consumption (g/10,000 Yuan of industrial added value).
The working environment of workshops (WEW)
Noise pollution is a serious problem in textile and clothing industry; especially in cotton textile industry. Due to a widespread use of shuttle looms, a noise in the weaving workshop can reach 90~106dB while the maximum allowable value to the ear is 85dB. As the report indicates, the effects of noise include tinnitus, headache, insomnia etc. This index includes two-second indexes to test and evaluate noise and an average density of dust (mg/m3) in textile and clothing workshop.