The poultry industry is the fastest expanding agriculture sector. The growth of this sector is also increasing the waste products linked to production operations. The main waste product is "poultry litter" which mainly contains the bedding material and the bird droppings. Although large quantities of poultry litter are being produced in poultry farms, it has limited disposal options. The direct open land spread or dumping can lead to problems of greenhouse gasses emission, water quality issues, pathogenic hazards. Therefore, treating poultry litter (for reuse or energy production) could reduce these problems.