Abstract: A method of producing compost from animal waste may include placing animal waste in a waste pit. The method may include removing liquid from a top layer of the waste pit. The waste pit may include a bottom layer disposed at a bottom of the waste pit and adjacent the top layer. The bottom layer may be composed primarily of solids. The top layer may be composed primarily of liquid. After removing the liquid from the top layer of the waste pit, the method may include agitating the waste pit to mix the top layer and the bottom layer and create sludge. The method may include pumping the sludge into a system of channels in fluid communication with each other. Each of the channels may be sloped downwardly such that the sludge travels by gravity through the system of channels.