| Literature DB >> 24681681 |
Paula Rúbia Ferreira Rosa1, Samantha Christine Santos2, Isabel Kimiko Sakamoto2, Maria Bernadete Amâncio Varesche2, Edson Luiz Silva3.
Abstract
The effects of different hydraulic retention times (HRTs) of 4, 2, and 1h and varying sources of inoculum (sludge from swine and sludge from poultry) on the hydrogen production in two anaerobic fluidized bed reactors (AFBRs) were evaluated. Cheese whey was used as a substrate, and 5000mgCODL(-1) was applied. The highest hydrogen yield (HY) of 1.33molmol(-1) lactose and highest ethanol yield (EtOHY) of 1.22molEtOHmol(-1) lactose were obtained at the highest HRT (4h). When the reactors were operated at an HRT of 1h, methane (0.68LCH4h(-1)L(-1)) was produced concurrently with hydrogen (0.51LH2h(-1)L(-1)). The major metabolites observed were soluble ethanol, methanol, acetic acid, and butyric acid. Cloning of the 16S rRNA gene sequences indicated that the microbial community were affiliated with the genera Selenomonas sp. (69% of the sequences), and Methanobacterium sp. (98% of the sequences).Entities:
Keywords: Cheese whey; Continuous anaerobic fluidized bed reactors; Lactococcus lactis; Methanobacterium sp.; Selenomonas sp.
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Year: 2014 PMID： 24681681 DOI： 10.1016/j.biortech.2014.03.020
Source DB: PubMed Journal: Bioresour Technol ISSN： 0960-8524 Impact factor: 9.642