The Walker Process vertical shaft mechanical mixer provides a low-energy solution for thorough and effective mixing in an anaerobic digester. Each agitator is custom-designed for the application and the specific geometry of the digester tank. The dual impeller arrangement is designed to optimize the most effective glide ratio at the lowest power usage and the highest pumping capacity. Features include a leveling base, low-power consumption compared to pumped systems, high turnover and controlled downward pumping to achieve whole volume mixing. The dual impellers are fabricated from stainless steel and attached to a carbon-steel shaft that is clad and sealed in stainless steel to provide the strength of carbon steel and the corrosion resistance of stainless steel. This system comes complete with full electrical controls. 630-892-7921; www.walker-process.com