An anaerobic digester is fed a feedstock, for example sludge from a municipal wastewater treatment plant, and produces a digestate. The methods of using their associated polypeptides for treating sodium channel dysfunction disorders including generalised epilepsy are also disclosed. Additionally, in a further embodiment, the tray lock mechanism contemplates a door extension that extends downward and blocks the opening when the door is in the closed position and unblocks the opening when the door is in an opened position. Following the flushing process to remove contaminants, the flushing system is disconnected from the cooling circuit and the cooling circuit is filled with fresh coolant. The method employs imprint lithography and a bilayer resist structure that simultaneously protects lower layers from harmful solvents and allows for cleaner liftoff by producing an undercut geometry to the resist pattern. The underlayer is formed of a metal nitride, and the antiferromagnetic layer is formed of an antiferromagnetic material including Ir and Mn.