Co-digestion of Animal Manure and Carcasses to Increase Biogas Generation

Livestock productions are changing with scale production increasing and concentration in some geographical areas. As a consequence, the activity environmental sustainability is under concern especially for manure and carcass management, disposal, or treatment. The livestock production system has its own particularities for each rearing process, resulting in residues with different characteristics. News technologies for pre-treatment and treatment for these residues have been established. Anaerobic digestion is an alternative for treatment due to this process combines the waste stabilization producing renewable energy and biofertilizer. The different components of manure excreted by livestock could be influenced on the biodegradation and biogas production. Previous studies are corroborated in this chapter and highlighted the importance of process control and digestate application when the carcass and manure are digested. For the evaluation of the efficiency of treatment processes, reduce environmental risks, and sanitary aspects, the choice of biomarkers is imperative. This chapter presents an approach and review to legislation about the conditions and criteria for the use of manure and carcasses in biodigesters and subsequently biofertilizer.