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We need a method to measure the concentration of coagulant in the chemical stock tanks. A hydrometer could be used if we can develop the relationships between density and coagulant concentration. Ideally we can obtain hydrometers and change the labels so that the read out is coagulant concentration. 

Analyze chemical mixing methods. We previously explored using a simple hand operated centrifugal pump inside the stock tank to mix high density stock solution with the overlying low density water. We need to do the theoretical analysis of this system to see if it is practical at full scale and if it is, then we need to devise fabrication methods for this mixing system. If the centrifugal pump system isn't feasible, then we need another mixing system that can be installed in the stock chemical tanks.

Invent

Low Flow Stacked Rapid Sand Filter

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