Appendix D: Process Research Solutions Monitoring Station

Addenda

• p. 182; D.5 Chemical Feed: "The final concentration of the chemical of interest in the chemical solution storage tank can be estimated by dividing the flow rate of water in the module line by the midpoint flow rate of the chemical feed pump and then multiplying by the final desired concentration of the chemical. Make sure both flow rates have the same units. In our example, we will divide 30 gph by 0.5 gph and multiply by 1 mg/L as phosphorus to calculate that our chemical solution storage tank should have 60 mg/L phosphorus.