- Master of Chemical Engineering Dept., Tatung University
講題: Selective Catalytic Oxidation Technology on IPA & NH3 Wastewater Treatment
- This presentation shows the technology applied three processes to treat the IPAL and NH3 wastewater of low concentration (normally ranged between 500~10000 mg/L). Those processes included RO membrane, air stripping and selective catalytic oxidation (SCO). The wastewater could be treated to meet the discharge regulation effectively and economically without producing any additional sub-product for further disposal demand.
- The raw wastewater first was filtrated by RO membrane for rising the IPA and NH3 concentration and reducing the volume of wastewater at the same time. Sequentially, the concentrated wastewater was treated by air-stripping unit for removal of the volatile IPA and NH3 to the gas flow. Finally, the gas flow contained IPA and NH3 was treated by a SCO unit for decomposing IPA and NH3 into CO2, N2 and H2O. The exhaust gas from this system could be directly discharged to the ambient without any hazard concern. By the way, the residual heat in the exhaust gas could be recovered to pre-heat the inlet gas flow of SCO as an advantage of saving the system energy consumption.
- Furthermore, the permeated water from the RO membrane (recovery rate about 60~80%) could be recovered for supplying to cooling tower or backwash with just simple post-treatment.