City of Bremen

City of Bremen

Location: Bremen, OH

Due to continuing problems of iron and water hardness, the City of Bremen decided to build its own water treatment plant. The Plant Superintendent had previous knowledge of the Dualator® treatment system. The City of Bremen decided to design the plant around Tonka Water’s proposed Dualator® VI and softening system. Raw water entering the plant has iron, manganese, and hardness; which need to be reduced prior to distribution. The plant is able to produce an excess of water, which it will be selling to a nearby town. Based on these sales, the equipment will pay for itself in five to six years.

The water treatment facility incorporates a 12’ diameter x 28’ over all height (OAH) Dualator® VI filter with two 6’ diameter x 9’-9” RidION™ ion exchange softeners. The Dualator® VI has four treatment processes: degassing and aeration: chemical feed of chlorine and potassium permanganate; detention time for chemical disinfection and floc growth; and dual media filtration for iron and manganese removal. The RidION™ ion exchange vessels are used for hard water softening and were designed to achieve hard water blending. This blending of the softened and hard water is a cost saving feature for Bremen, with the final hardness effluent blended to 100 mg/L.

The raw water analysis summarized below reflects moderate concentrations of iron and calcium   hardness. The Tonka Water treatment process has been highly efficient in delivering high quality water.

Raw Water
Finished Water
Iron (Fe)2.0 mg/L0.01 mg/L
Total Hardness500 mg/L100 mg/L

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