Format

Send to

Choose Destination
Bioresour Technol. 2015 Jan;175:480-5. doi: 10.1016/j.biortech.2014.10.121. Epub 2014 Oct 31.

Optimization of biogas production from Sargassum sp. using a design of experiments to assess the co-digestion with glycerol and waste frying oil.

Author information

1
CEB-Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal.
2
CEB-Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal. Electronic address: madalena.alves@deb.uminho.pt.

Abstract

A design of experiments was adopted to assess the optimal conditions for methane production from the macroalgae Sargassum sp. co-digested with glycerol (Gly) and waste frying oil (WFO). Three variables were tested: % total solids of algae (%TSSargassumsp.), co-substrate concentration (gGly/WFOL(-1)), and co-substrate type (Gly or WFO). The biochemical methane potential (BMP) of Sargassum sp. was 181±1L CH4kg(-1) COD. The co-digestion with Gly and WFO increased the BMP by 56% and 46%, respectively. The methane production rate (k), showed similar behaviour as the BMP, increasing 38% and 19% with Gly and WFO, respectively. The higher BMP (283±18L CH4kg(-1) COD) and k (65.9±2.1L CH4kg(-1) CODd(-1)) was obtained in the assay with 0.5% TS and 3.0gGlyL(-1). Co-digestion with glycerol or WFO is a promising process to enhance the BMP from the macroalgae Sargassum sp.

KEYWORDS:

Anaerobic co-digestion; Design of experiments; Glycerol; Sargassum sp.; Waste frying oil

PMID:
25459858
DOI:
10.1016/j.biortech.2014.10.121
[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Elsevier Science
Loading ...
Support Center