The Vaughan Scumbuster® virtually eliminates the effects of a scum blanket and prevents it from reforming by homogenizing and conditioning through a recirculation nozzle. This type of mixing allows digesters to regain their design capacity, extends the time between cleanouts and generates more methane gas. The Vaughan Scumbuster operating with the Vaughan chooper pump on digester recirculation has proven successful not only to eliminate heat exchanger clogging, but also to replace other failed digester mixing systems.