Publication year: 2010
Source: Bioresource Technology, In Press, Corrected Proof, Available online 3 June 2010
I. , Díaz , A. C. , Lopes , S. I. , Pérez , M. , Fdz-Polanco
The removal performance of hydrogen sulphide in severely polluted biogas produced during the anaerobic digestion of sludge was studied by employing pure oxygen, air and nitrate as oxidant reactives supplied to the biodigester. Research was performed in a 200-L digester with an hydraulic retention time (HRT) of ∼20days under mesophilic conditions. The oxygen supply (0. 25Nm3/m3 feed) to the bioreactor successfully reduced the hydrogen sulphide content from 15,811mg/Nm3 to less than 400mg/Nm3. The introduction of air (1. 27Nm3/m3 feed) removed more than 99% of the hydrogen sulphide content, with a final concentration of ∼55mg/Nm3. COD removal, VS reduction and methane yield were. . .
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