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Photodegradation Or UV-Oxidation Technologies

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1. What is the success rate and estimated cost for implementing Supercritical Water Oxidate?
2. What kind of contaminant can be treated with the UV light process?

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Solution Summary

The solution discusses what is the success rate and estimated cost for implementing supercritical water oxidate. It also describes what kind of contaminant can be treated with the UV light process.

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1. The Supercritical water oxidate (SCWO) process uses the special physical properties of supercritical water (Temperature = 374oC and Pc= 22.1 MPa) (Kritzer and Dinjus, 2001). It has been found that the SCWO process has achieved greater than 99% of organic carbon conversion and recovered more that 90% of boron in the form of boric acid (Kritzer and Dinjus, 2001). Additionally, there has been proven to me more than 99% removal of sodium as sodium carbonates in the past (EPA, 1999).

Overall, SCWO has proven to be successful as a destructive treatment of many organic species and increases efficiency can be achieved by increasing the reaction temperature or through addition of a catalyst (Ding et al., 1995). It has proven to be able to remove 90-99% of the contaminant of interst in several studies (Ding et al., 1995). However, caution needs to be exercised as some of the products identified from SCWO of phenols and other contaminants are more hazardous that the starting organic component.

Treatment and recovery using SCWO has important ...

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