Recently, Exponent Envirotech's Indigo Recovery System achieved successful acceptance at Advance Denim. This milestone reflects the strong confidence Advance Denim has in Exponent Envirotech's technological capabilities and equipment performance, showcasing a continued partnership aimed at fostering a circular economy through innovative solutions.

01 A Collaborative Journey: Exploring Solutions for the Denim Industry

Advance Denim, a globally recognized leader in high-end denim manufacturing, has long focused on clean production and low-carbon sustainable development. In 2023, our two companies reached a consensus for joint research and development, leading to the launch of the Indigo Recovery System project in November.

By June 2024, the first system was successfully implemented at Advance Denim, demonstrating stable operation and impressive results. In May 2025, recognizing the value of green production technology, Advance Denim officially initiated a Phase II collaboration on the Indigo Recovery System. Together, we aim to address the environmental challenges associated with denim dyeing, contributing to the high-quality development of Chinese manufacturing.

02 Technological Innovation: Unlocking Economic and Environmental Value

The Indigo dyeing washing process at Advance Denim generates approximately 120 m³ of wastewater daily. To ensure effective resource utilization, the Indigo Recovery System is designed with a processing capacity of 80 m³ per day, balancing production stability and the quality of recycled resources.

Utilizing membrane separation technology and industrial on-line monitoring technology, the system achieves over 95% recycling of both indigo and water. Additionally, it features a comprehensive online monitoring system that tracks critical quality indicators such as ORP, indigo concentration, and pH in real-time, ensuring that the recovered indigo and water meet the stringent requirements for high-end denim production.

03 Tailored Solutions: Customized Services to Meet Production Needs

This system is characterized by its efficient technical configuration, having completed installation and debugging within just 40 days to minimize disruption to the customer's operations. It incorporates a real-time monitoring feature for online recovery rates, facilitating precise production management. Moreover, multiple washing tanks have been added to flexibly accommodate various dyeing processes, further enhancing water-saving efficiency. With features like one-touch start/stop, fault warning, and automatic flushing, the system significantly reduces operational complexity.

Advance Denim emphasized that the industry is rapidly progressing toward a new phase of low-carbon and circular development. Managing resource consumption and environmental control in indigo dyeing are essential challenges for transformation. They expressed anticipation for deepening strategic cooperation with Exponent Envirotech, focusing on advancing green technologies such as digitalization and electrochemistry in the near future.