Catalytic oxidation with Al-Ce-Fe-PILC as a post-treatment system for coffee wet processing wastewater.
The effluent from the anaerobic biological treatment of coffee wet processing wastewater (CWPW) contains a non-biodegradable compound that must be treated before it is discharged into a water source. In this paper, the wet hydrogen peroxide catalytic oxidation (WHPCO) process using Al-Ce-Fe-PILC catalysts was researched as a post-treatment system for CWPW and tested in a semi-batch reactor at atmospheric pressure and 25 °C. The Al-Ce-Fe-PILC achieved a high conversion rate of total phenolic compounds (70%) and mineralization to CO(2) (50%) after 5 h reaction time. The chemical oxygen demand (COD) of coffee processing wastewater after wet hydrogen peroxide catalytic oxidation was reduced in 66%. The combination of the two treatment methods, biological (developed by Cenicafé) and catalytic oxidation with Al-Ce-Fe-PILC, achieved a 97% reduction of COD in CWPW. Therefore, the WHPCO using Al-Ce-Fe-PILC catalysts is a viable alternative for the post-treatment of coffee processing wastewater.
Departamento de Química, Universidad Nacional de Colombia, Bogotá, Colombia.
Nancy R
NR
Sanabria
Yury M
YM
Peralta
Mardelly K
MK
Montañez
Nelson
N
Rodríguez-Valencia
Rafael
R
Molina
Sonia
S
Moreno
D002384:Catalysis; D003069:Coffee; D007220:Industrial Waste; D010084:Oxidation-Reduction; D014865:Waste Disposal, Fluid / Q000379:methods*
D003069:Coffee; D007220:Industrial Waste