Material drying cookers (batch and continuous), sterilization systems, votator, tallow press expellers anco & desmet, chilled pet food systems, continuous hydrolyzers, pumping system, cherry-burrell/waukesha, pressure coded vessels, grinding/pre-breaking, condensing systems, continuous percolators, waste heat recovery, mechanical dewatering, odor control, process piping, cherry-burrell/waukesha, material handling (conveying & storage), electrical process control.