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Official thesis title: “Investigation on preparation of catalyst for catalytic wet air oxidation and application for treatment of biologically persistent wastewater”
1. Full name: Vu Thi Hau
2. Sex: female
3. Date of birth: 16/10/1976
4. Place of birth: Thai Nguyen, Viet Nam
5. Admission decision number: 2385/SĐH dated: June 29th 2007 by President of Vietnam National University, Hanoi.
6. Changes in academic process: none
7. Official thesis title: “Investigation on preparation of catalyst for catalytic wet air oxidation and application for treatment of biologically persistent wastewater”
8. Major: Physical and theoretical chemistry
9. Code: 62.44.31.01
10. Supervisors: Assoc.Prof. Dr Cao The Ha
11. Summary of the new findings of the thesis:
It was revealed that Vietnamese transition metal ores have certain catalytic activity in catalytic wet air oxidation (CWAO) process. Heat treatment did not increase reactivity significantly.
The Mn-ore showed the highest activity in color removal, but low in COD removal; addition of Fe and Cu produced two- or three-component catalysts with higher activity regarding to COD removal. Catalyst containing Cu showed relatively high activity in terms of both color and COD removal, it was chosen to be applied in oxidation of the real wastewater from dye house in soft reaction conditions. The results made a contribution to diversify the catalyst’s list for CWAO treating textile wastewater in particular, and wastewaters containing biologically persistent organic substances in general.
The real dye house wastewater treated by CWAO increased its BOD/COD ratio from 0.2 up to 0.5-0.6, therefore the CWAO may be proposed as a pre-treatment step followed by conventional biological treatment in an integrated scheme for treatment of such a kind of biologically persistent wastewater.
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