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<br />indication that UV oxidation should be efficient in this water. The UV absorbance spectrum which is <br />plotted between 200 nm and 300 nm is consistent with the other measured water quality parameters. <br /> <br /> <br /> <br />Figure 1: Summary of Filtered St. Anthony Water Quality <br /> <br /> <br />3.2 UV-AOP PILOT SYSTEM DESIGN <br /> <br />This document focusses on the UV/H 2 O 2 AOP treatment system design, test procedures and results. <br />The main components of the pilot system comprise the feed supply, chemical injection and mixing, <br />flow measurement, the UV reactor with influent and effluent sample ports as well as the GAC <br />contactor. The UV reactor was a TrojanUVPhox™ A02 system comprising 2 low-pressure high <br />output amalgam lamps that each draws approximately 100 W of electrical power. The total power <br />draw is about 200 W. <br /> <br />A photograph of the pilot set-up is shown in Figure 2. Trojan’s UV/H 2 O 2 pilot system was <br />conveniently shipped in a small crate with pre-assembled UV reactor inlet and outlet piping and <br />components together with two chemical injection pumps and electrical supply components. The pilot <br />system is supplied with filtered St. Anthony water. Two chemical injection systems were provided. <br />One was a hydrogen peroxide injection pump, tubing and nozzle to deliver the required H 2 O 2 dose to <br />the reactor feed water. A second injection system metered the 1,4-dioxane solution. The H 2 O 2 stock <br />was injected into the reactor influent stream just upstream of a static mixer. An influent sample port <br />was located downstream of a rotameter which provided accurate flow measurement. The pipe <br />transitions from 1” to 3” diameter to match the UV reactor influent flange. The UV reactor itself is 6” <br />diameter with 3” influent and effluent flanges. The effluent pipe leaving the reactor is immediately <br />16-Oct-15 <br />Project Name/Site <br />Sample <br />Description Sample Date <br />Saint Anthony Village, MN <br />e 3&5 te Sa d <br />Before GAC 07/09/15 Parameter Units Result <br />pH 7.8 <br />Treatment Objectives 1.50 log 1,4-D alkalinity mg/L as CaCO3 276.2 <br />Sizing 3x2-D72AL75s reactor(s)UVT254nm % transmission 96.3 <br />10.0 ppm H2O2 DOC ppm 1.2 <br />Hydroxyl Radical Scavenging Nitrate ppm as NO3-0.3 <br />Low Scavenging <br />Environmental Contaminant Treatment <br /> Sample Report- CONFIDENTIAL <br />Analytical Results <br />0.000 <br />0.050 <br />0.100 <br />0.150 <br />0.200 <br />0.250 <br />0.300 <br />200 210 220 230 240 250 260 270 280 290 300 <br />Ab <br />s <br />o <br />r <br />b <br />a <br />n <br />c <br />e <br /> <br />( <br />c <br />m <br />-1) <br />Wavelength (nm) <br />UV Absorbance Spectrum <br /> 6