Introduction of Wheel Disc Compost Turner The wheel disc compost turner is suitable for large-span and deep-turning composting of organic wastes such as livestock manure, sludge, mushroom residue, sugar residue, Chinese herbal medicine residue, biogas residue and plant straw. It is widely used in livestock farms, organic fertilizer factories, sludge treatment plants, gardens and agaricus bisporus planting farms for material fermentation, maturation and moisture removal.