Anaerobic digestion is a collection of processes by which micro-organisms break down biodegradable material in the absence of oxygen. The process is used for industrial or domestic purposes to manage waste and/or to produce fuels. Whenever required by legislation or quality demands, pasteurisation may be employed at some stage during the anaerobic digestion process. These applications demand the use of high integrity materials and careful product selection, to ensure the process plant performs reliably. Orbinox ‘EB’ series bi-directional high integrity knife gate valve technology is the perfect choice to meet the most demanding slurry feedstock and digestate applications.