Why You Should Replace Your Old Mixer With New Submersible Mixers

Mixing is a critical process in wastewater treatment, allowing for blending, preventing sedimentation of solids, and creating ideal conditions for biological nutrient removal (BNR). However, many mixers in use today are oversized and overpowered, leading to wasted energy and increased costs. Older mixers are often inefficient due to their inability to change speeds and their less efficient motors, which are often operating at full speed.

WWTPs can improve BNR and save energy and money by replacing older mixers with newer submersible mixers. These mixers utilize energy-efficient motors and advanced hydrodynamics to create ideal conditions at any flow rate, tank size, or total suspended solids (TSS) concentration. Submersible mixers can be positioned at an ideal angle to create a precise jet stream based on the tank size and geometry, resulting in good bulk flow and thorough mixing.

When comparing mixers, a reliable metric is the thrust-to-power ratio, which measures how much force is produced by the mixer divided by the electric input power consumed to create that force. This ratio is a scientifically measurable way to quantify mixer efficiency, and it allows engineers and plant managers to compare consistent data across all products.