Prosperity Textiles achieves 17% water savings using Higg data
For the past four years, the company has used Higg to monitor progress across seven critical environmental impact areas, with a particular focus on water. Over the past few years, Prosperity Textiles has implemented sustainability initiatives across chemicals, wastewater, and water use. Each of these projects is inherently interconnected, and Higg helps Prosperity track performance across all of these areas in a single platform. The platform specifically helped Prosperity manage its wastewater projects, revealing its facility scored significantly higher than Chinese national standards.
Managing chemicals in color
Zhong sees chemical management as one of the more challenging environmental impact areas for Prosperity. According to him, “there are many chemicals used in denim fabric production, and unlike water, [they are difficult] to recycle, or to find more sustainable alternatives for, in terms of cost and scale.”
In 2017, Prosperity’s facility in Shaoguan implemented a new centralized system for dye preparation and transportation. Engineers enter dye formulas into a computer and dyes are automatically weighed, mixed and delivered.
Zhong likens the process to a kitchen: “If you can’t mix the right amount of salt and pepper every time, you won’t always be lucky enough to get a taste you like.” With this new dye system, the Shaoguan facility can measure and compare chemical use when developing various indigo formulas. This led to improved quality control and a reduction in fabric waste previously caused by human error.
The company focused on setting a chemical baseline with the system and was able to compare its 2017 performance with 2018 results. The comparison allowed them to understand the quantity of chemicals that can be saved with the system, reducing environmental impact, and creating financial savings.
Less water use in 6 months
In the first half of 2018, Higg helped Prosperity measure a 6.5% reduction in indigo dye while achieving an 8% increase in color accuracy. The reduction of error also resulted in 17% less water use. With this successful trial run under their belt, the company will be able to scale this technology into additional facilities.
Reducing caustic soda
Prosperity uses high concentrations of caustic soda during mercerization, a process that alters a fabric’s strength, luster, and ability to absorb dye. The process creates wastewater with a high pH, which can be harmful if disposed of in natural waterways. In an effort to minimize harmful wastewater, Prosperity implemented a caustic soda recycling program to collect, filter, and re-concentrate the waste, allowing the company to reuse the chemical.
With Higg, the company measured that the system reduced caustic soda use by 1,100 tons and sulfuric acid by 500 tons per year.
Less tons caustic soda use per year
Reducing water in a high-risk region
In pursuit of a more sustainable denim manufacturing process, Prosperity is also focused on reducing its water consumption. Historically, as a byproduct of the finishing process the company released 240 tons of wastewater heated 98 degrees Celsius each day.
So in 2014, the company installed a water recycling system designed to collect condensation from water accumulated on dryers during the denim finishing process. The recycling project diverted this water for reuse throughout other manufacturing processes. Higg measured this system alone to save 80 thousand tons of water and 1,500 tons of coal per year, while also reducing overall wastewater output.
Less sulfuric acid per year
The Higg FEM assesses the individual needs and specific environmental impacts of facilities around the world. For example, facilities that are heavy water users, or that are located in high-water risk areas, must respond to more rigorous water management questions.
Using Higg to monitor multiple efforts
Prosperity will rely on Higg on an ongoing basis to determine the impacts of its multi-pronged sustainability program – from chemicals automation that reduces waste, to caustic soda recycling, and the hot water diversion that saves both water and energy. Using Higg, the company can monitor not only the effects of each project’s primary impact, but also how each program interconnects and improves Prosperity’s overall sustainability.
Getting buy-in: clear business value
When pursuing a new project, the Prosperity Textiles sustainability team creates a plan to assess the return on investment they can expect. Then, they set up a trial run. First, they run a small test, collect data, and compare savings for both financial and environmental impact. “Nothing beats the actual savings, environmentally and financially, when you are promoting the project to senior leadership,” Zhong says.
To make sustainability more relatable and manageable, Zhong recommends that companies think of sustainability as a long-term investment. While there may be short-term gains and losses, the real difference occurs in the long run. At the start, Zhong encourages Higg users to implement projects at their own facilities in partnership with key customers or supply chain partners. Being able to identify a supply chain partner that will support sustainability initiatives can help projects gain traction internally.
“The Higg Index tools have enabled us to take the first thorough assessment of our sustainable performance,” says Zhong, “we integrated Higg FEM into our sustainability management. We use our Higg FEM score as a check list to keep our sustainable practices in check. The more years you use the Higg Index, the better you know your ‘green’ path is clear and that you can continue to follow it.”
We look forward to seeing how Prosperity improves with time.