期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2015
卷号：4
期号：3
页码：807
DOI：10.15680/IJIRSET.2015.0403002
出版社：S&S Publications
摘要：The anaerobic digestion of slaughterhouse wastewaters, used as a model of fluids with high TSS content,was improved by application of micro-aeration of the influent. Digestibility of the total suspended solids (TSS) wasimproved to prevent their accumulation in the sludge and protect methanogens from their inhibition effect. This wasensured by a controlled dissolution of oxygen in the influent, prior to the anaerobic digestion, by continuous aerationwith air at a rate of 15 ml/min, corresponding to 0.05 vvm (volume of air per volume of feeding solution per minute).The methane production yields were of almost 350 and 200 ml CH4 per removed g of CODsol and CODtot, respectively.The micro-aeration of the influent also lead to application of higher organic loads to the treatment system, besides thehigh methane production yields. These results were obtained at 38°C, which is not common and suitable to anaerobicdigestion, but appropriate for enhanced hydrolytic enzymes activities. It was clearly shown, that the improvement ofmethane production yields was associated to dissolution of TSS. These findings are of great importance from thepractical point of view, and technically evidence the emerging idea of tolerance of low aeration in anaerobictechnologies.
