Effects of the dose of oxygen during Microaeration on anaerobic digestion process*

Abstract

Microaeration is a new technology applying on anaerobic digestion (AD) to achieve many benefits. This pepper focused on the effects of different doses of oxygen (0.07,0.1,0.15 LO₂\L_feed\day) on  improving methane production and  removing H₂S from the biogas . Dosing point was in the head of the (AD). As a result the removal of H2S increased with increasing oxygen dose, Best removal of H2S was 92% at (0.15 LO₂\L_feed\day) ,but this dose had bad effects on methanogens and CH4 production . So (0.1 LO₂\L_feed\day) was the best dose with 87% removal of H2S and 69.8% CH4 (V\V%).