Propel is a digester which contains unique mixture of composting microbes for activating the composting process, comprising of microbial enzymes, cellulose, starch, phenol and lignin digesting microbes to degrade the farm residues. It can be used for preparation of compost from a variety of agricultural waste, domestic waste, municipal solid waste, vegetable and garden waste, leaf waste and wood clippings. This product is eco-friendly and safe and effective in digesting and composting any biodegradable wastes. This product preserves bio-diversity and improves the soil structure.