Centrate Tank Mixing and Pumping Modifications

The mixing capabilties in our centrate tanks. These tanks are a retro fit from their original design. We have the capability of using 1-3 tanks that feed into a pumping channel. We are looking for adequate mixing that will keep solids in suspension as the tanks fill up and pump down. We will consider different options, do not want vertical shaft mixers that would require building a bridge over the tanks or floating mixers. Liquid level in the tanks vary from 11 ft to 2 ft., rising and falling as we run centrifuges. We also want to imporve our centrate pumping and control capabilities. We currently pump with 2 submersible sump pumps feeding into an 8 inch line with no flow meter and no VFD's. We would like to have pumps with variable flow rates and a flow meter installed. Flow rate capability should be 20-80 gallons per minute. Typical pH range in this tank is 2-4 and aluminum sulfate is added to the tank. Equipment should be able to withstand these conditions.

Division 02 -	Existing Conditions, Subsurface Investigation.
Division 03 -	Concrete, Concrete Reinforcing, Cast-in-Place Concrete.
Division 05 -	Metals, Structural Metal Framing, Metal Decking.
Division 22 -	Plumbing, Plumbing Piping, Plumbing Equipment.
Division 23 -	Heating, Ventilating, and Air Conditioning (HVAC), Facility Fuel Piping, Facility Fuel-Storage Tanks.
Division 26 -	Electrical, Instrumentation and Control for Electrical Systems.
Division 31 -	Earthwork, Clearing and Grubbing, Grading.
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Division 33 -	Utilities, Water Utilities, Water Utility Distribution Piping, Water Utility Distribution Equipment, Water Utility Pumping Stations, Wells, Storm Drainage Utilities.
Division 44 -	Pollution and Waste Control Equipment, Water Pollution Control Equipment.