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Share via Email Textiles have one of the largest water footprints. Dyeing is a big problem both in terms of water use and pollution. Martin Godwin Textiles leave one of the largest water footprints on the planet and dyeing poses an especially big problem. Dye houses in India and China are notorious for not only exhausting local water supplies, but for dumping untreated wastewater into local streams and rivers.
The industry's challenge is to adopt more water-friendly technologies to dye cotton and polyester, the two most mass marketed textiles.
So what can companies do to mitigate the effects of this timeless, yet toxic, dyeing process? A 1-to ratio is common.
Reaching a 1-to dye-to-water ratio is an accomplishment, Hattori explained, and when asked whether the manufacturer would then simply need more dye, she replied with an emphatic "you don't". Diluting a dye, she countered, simply means wasting more water: Various fabrics require different manufacturing processes, so one best technology does not exist for low-water or waterless dyeing.
Waterless dyeing should be the textile industry's holy grail, but widespread adoption is years away. In Hattori's view, polyester is the prime candidate because dyeing performs best in an airless environment with pressurised high heat, allowing dyes to disperse throughout the fabric.
Colouring fabric using this waterless method could be feasible for polyester; natural fibres such as cotton and wool, however, can become damaged undergoing a similar process.
One company taking on the textile sector's excessive consumption of water is ColorZen. Its process modifies cotton's molecular structure and allows dye to settle within the fibres without requiring the massive discharge of water, eliminating the need to rise off fixing agents that keep a fabric's colouring consistent.
Another US firm, AirDye, insists its technology uses a sliver of the water and energy compared to traditional dyeing processes, and has several niche designers and manufacturers as customers.
Instead of water, the company's technology uses air to disperse dye. AirDye's process embeds dye within textile fibres instead of merely on them, so colour lasts longer and is more resilient to chemicals and washings. Other than nebulous talk about partnering with NGOs to reduce water consumption, few large companies currently consider new waterless or near-waterless technologies.
One that does is Adidas. During a telephone conversation earlier this summer, Alexis Olans, a senior director of the company's sustainability programs, explained the challenges and successes of what Adidas brands its "DryDye" technology.
Instead of water, Adidas' supplier uses compressed and pressurised carbon dioxide as the agent to disperse dye within polyester fabric. The CO2, which takes on liquid-like properties, is contained in stainless steel chambers.
After the dyeing cycle the CO2 becomes gasified, and dye within the cotton fibres condenses as it separates from the gas. The CO2 is then recycled and pumped back into the dyeing vessel.
Adidas claims using CO2 is a safe and environmentally-friendly option because the gas is contained and can be used repeatedly without the risk of any emissions.
Although dyeing using compressed CO2 has existed for over 25 years, Adidas claims a supplier in Thailand operates the only factory with the ability to scale this technology. So can this process transform the textile industry? Not quite yet according to Christian Schumacher, an expert in textile dyes and chemicals, who points out that investment in such equipment is still costly.
Nevertheless, assumptions water is integral to dyeing are crumbling. We discovered an answer that not only solved the intended goal, eliminating water, but also had multiple positive side effects, including a reduction in energy and chemicals.
And among large global brands and retailers, few have aggressively ventured into waterless dyeing technology. Nike and Ikea recently partnered with Netherlands-based DyeCoo, owners of the technology used to make Adidas' DryDye shirts, but have been quiet since that agreement. Why are the world's largest apparel companies not doing more?
The answer in part lies in TirupurIndia, home to scores of factories and workshops where workers dye materials for t-shirts and other garments marketed around the world.
Local dye houses have long dumped wastewater into the local river, rendering groundwater undrinkable and local farmland ruined.
Despite tougher regulations, a watchful local press, and the closure of companies in non-compliance, water pollution has festered. The city'sresidents, not multinational textile companies, pay the price.
The global demand for cheap clothing will push dye houses to simply react to local regulations by moving operations to another city. Moral outrage will not convince many leading clothing manufacturers to change their ways; as long as companies do not pay a price for the land and water their suppliers poison, watch for the excessive use and abuse of water to dye clothing to continue.
This content is brought to you by Guardian Professional. Become GSB member to get more stories like this direct to your inbox Topics.Water pollution is the main issue when it comes to textile industry. Textile industry is a voracious consumer of water. The water is used for various processes like sizing, scouring, bleaching, dyeing, printing and other finishing processes.
The textile industry contributes to water pollution, but there are ways to lessen its environmental footprints. Here are four ways businesses can do so.
The textile industry, which has been using copious amounts of water to dye garments for hundreds of years, may be reluctant to embrace this change. After all, this new technology is expensive to install and only works on certain fabrics. The textile industry uses more than 8, chemicals to make the billion m 2 of fabric sold annually around the world.
Many are toxic and persist in the environment.
Many are toxic and persist. Read article about Pollutants for Environmental Pollution by textile industry - Textile Companies offers various pollutants which leads to Environmental problems such as Water Pollution, Air.
Textiles have one of the largest water footprints. Dyeing is a big problem both in terms of water use and pollution. Photograph: Martin Godwin Textiles leave one of the largest water footprints on.