Researchers investigated a new way to turn vegetable waste into nutrient-rich compost by combining in-vessel composting with vermicomposting. They found that using a specific type of earthworm called Eisenia fetida resulted in the best compost quality and nutritional content. This combination process reduced total organic carbon by 52.5% and increased nitrogen content from 1.4% to 4.15%. The composting process was faster, taking only 27 days, which could lead to more efficient organic waste treatment in the future.