The Polyester/Cotton Blend Ultrasonic Ambient-Temperature Recycling System separates polyester/cotton blends by degrading cotton into cellulose, which disperses in water, while polyester retains its fiber form, achieving two-phase separation. Operating at 25°C, it offers high recovery rates and efficiency, addressing the challenge of recycling blended textiles. Its modular design lowers equipment development barriers, enhancing industry adoption. It could enable the recycling of 30 million tons of global textile waste.