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The UV transmittance was tested using a DR 5000 spectrophotometer shown in <br />Figure 2.4. The UV transmittance was tested at 254 nanometers using a 10 - <br />millimeter cuvette. Distilled water was used for a blank and to zero the <br />spectrophotometer. <br />Figure 2A DR 5000 Spectrophotometer <br />3. Chlorination Testing Procedure and Equipment <br />Chlorine is a strong disinfectant and a strong oxidizing agent. Chlorine has the <br />ability to oxidize compounds within the wastewater, making it a desirable <br />chemical to evaluate the effectiveness that it has to remove the color from the <br />wastewater effluent and increase the UV transmittance. Even though, the City <br />of Elk River does not use chlorine as a primary disinfectant, bench scale testing <br />was performed to evaluate the effectiveness of chlorine to remove color in the <br />wastewater. <br />The testing was designed to determine chlorine dosage that improves UV <br />transmittance in the treated wastewater. The filter effluent samples were <br />Prepared by: Bolton & Menk, Inc. Experimental Set -Up <br />Waste Management/Elk River Leachate Pilot Study I T21.109643 Page 6 <br />