RADIATION PHYSICS AND CHEMISTRY/ (VOL. 153)
Volumen: 153, Numero: 1, Páginas: 234-238 pp
The purpose of this work was to evaluate the production of biohydrogen by activated sludge residues exposed to low doses of gamma radiation. To achieve our goal sludge and waste water were collected from the treatment plant of a textile company. The sludge was irradiated with 0.1, 0.35, 0.6 kGy of gamma radiation. Four Dark Fermentation Reactors and four Microbial Electrolysis Cells were assembled, using as substrates in both cases, irradiated sludge and a control sample. The volume of biogas produced was monitored for 201 days, as well as the concentration of biohydrogen and methane generated. Our results show that the doses of gamma radiation applied, inhibited the activity of methanogens. The generation of biohydrogen and the dose of gamma radiation present a non-linear relationship. The dose of 0.35 kGy, gave the largest volume of biogas and the highest concentration of biohydrogen. The production of biohydrogen was continuous and constant for the last 82 days until termination of the study.
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