Case Studies

Case Studies

RE100 and RE300 have been used successfully at several wastewater treatment plants in the U.S. In fact,  rare earth chloride technology has been used in over 50 facilities in over 12 states, including Wisconsin, Virginia, Pennsylvania, New York, Minnesota, Vermont, Ohio, Illinois, Wisconsin, Indiana, Texas, Washington.

Below are summaries of the results from using our products at two of these facilities.

City of Hartford, WI Wastewater Treatment Plant

Results from Hartford, WI

The City of Hartford Water Pollution Control Facility (WPCF), a 3.4 MGD municipal wastewater treatment plant that discharges directly into the Rubicon River, a “Class A” trout stream. Hartford was one of the first municipalities in Wisconsin to receive a new total phosphorus permit for a final water quality based effluent limit (WQBEL) of 0.075 mg-P/L. The plant has no dedicated biological phosphorus removal system, and relies on ferrous chloride for chemical phosphorus removal. Attempts to reach 0.075 mg-P/L with ferrous chloride were unsuccessful. Increasing the ferrous chloride dose to 30 – 60 ppmv only reduced TP to an average of 0.5 mg/L. Even with ferrous chloride doses of 100 – 120 ppmv, phosphorus in the final effluent could only be reduced to 0.3 mg-P/L. Here is what happened when they turned to rare earth chloride solutions.

Results From Albion, PA

A 770,000 GPD municipal wastewater treatment plant in Albion, Pennsylvania, which was discharging to a stream leading to Lake Erie, was having difficulty meeting its total aluminum (1.1 mg/L) and total phosphorus (1.0 mg/L) permits.  After months of dosing 60 ppmv of either ferric chloride or PAC prior to the secondary clarifier, the plant was unable to meet its permit limits.  Attempts to meet the permit by increasing the dosage rate of either coagulant were unsuccessful.  When higher doses of ferric chloride were attempted, buried chemical feed lines corroded, leading to expensive repairs.  Higher doses of PAC caused aluminum concentrations in the final effluent to exceed the plant’s aluminum permit.  Since the plant was running out of options, plant management decided to conduct a full-scale trial with RE100.

Albion, PA Wastewater Treatment Facility