Nature Communications, Published online: 13 June 2026; doi:10.1038/s41467-026-74387-0 Okara, a major by-product of soybean processing, is generated at an estimated 140 million tonnes annually, with landfill disposal contributing to pollution and the loss of valuable organic resources. Conventional aerobic composting is land-intensive, slow, and associated with substantial greenhouse gas emissions and strict operational requirements. Here, the authors develop an Electrochemical Artificial Humific