Proceedings

Electricity Production, H2 Generation and CO2 Mitigation During Wastewater Treatment by a Modified Fenton Process

Tokumura, M., Morito, R., Znad, H.T. and Kawase, Y., Research Center for Biochemical and Environmental Engineering, Department of Applied Chemistry, Toyo University, Japan

 

(free)

The Fenton process was applied to electricity poduction, hydrogen generation and carbon dioxide
mitigation during wastewater treatment. In the wastewater treatment plant, where Fe plates and carbon
plates were employed as the anode and cathode, respectively, Fe plates corroded and eluted ferrous ions
into the solution by accompanying the production of electricity. Ferrous ions were used in the Fenton
process. They produced the hydroxyl radicals oxidizing and mineralizing rapidly and nonselectively organic
pollutants in wastwater. At the cathode, simultaneously, electrons transferred from the anode caused the
hydrogen production. In other words, degradation of pollutants and production of electricity and
hydrogen could be carried out simultaneously and effectively. Furthermore, the precipitation of FeCO3 by
elevating solution pH may lead to CO2 sequestration.

The experiments were conducted using Orange II solution as a model wastewater. The eluted ferrous ion
concentration, electric current, hydrogen production rate and CO2 removal rate have been experimentally
examined with a wide range of the operating conditions.


Keywords
Eletricity production; Hydrogen generation; Carbon dioxide sequestration; wastewater treatment; Fenton
reaction

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