The chicken manure can become good compost after in-vessel fermentation. In vessel fermentation method is an organic fertilizer composting system which can save production area and manpower investment. What’s more, it can shorten the animal manure fermentation time to 7-10days. Then, how to ferment the chicken manure with in vessel composting system? The process can be divided into three steps. They are chicken manure pre-treatment, fermentation and packing. You can get the detailed composting process from the following.