Two pumps with frequency conversion at front and back of plate cooler, can adjust pump,s conveying frequency in reference with the distance of fermentor. It is a way to reduce electric consumption and enhance equipment safety.Aeration capacity: 8-16ppmAeration Control mode: One way is performing on line control through the feedback of oxygen dissolving meter; while another way is accurately adjusting through mass flow meter and high precision regular valve.Lehui typical high efficiency mixer ensure the dissolution of oxygen is even, sanitary and accurate.Separate wort aeration system, with aseptic air, filtered pressure-reduced steam