Format

Send to

Choose Destination
Environ Technol. 2015 Jul-Aug;36(13-16):1884-91. doi: 10.1080/09593330.2015.1015454. Epub 2015 Mar 5.

Effect of initial total solids concentration on volatile fatty acid production from food waste during anaerobic acidification.

Author information

1
a School of Environment , Tsinghua University , Beijing 100084 , People's Republic of China.

Abstract

The effect of initial total solids (TS) concentration on volatile fatty acid (VFAs) production from food waste under mesophilic conditions (35 °C) was determined. VFAs concentration and composition, biogas production, soluble chemical oxygen demand concentration, TS and volatile solids (VS) reduction, and ammonia nitrogen [Formula: see text] release were investigated. The VFAs concentrations were 26.10, 39.68, 59.58, and 62.64 g COD/L at TS contents of 40, 70, 100, and 130 g/L, respectively. While the VFAs' yields ranged from 0.467 to 0.799 g COD/g VSfed, decreased as initial TS increased. The percentage of propionate was not affected by TS concentration, accounting for 30.19-34.86% of the total VFAs, while a higher percentage of butyrate and lower percentage of acetate was achieved at a higher TS concentration. Biogas included mainly hydrogen and carbon dioxide and the maximum hydrogen yield of 148.9 ml/g VSfed was obtained at 130 g TS/L. [Formula: see text] concentration, TS and VS reductions increased as initial TS increased. Considering the above variables, we conclude that initial TS of 100 g/L shall be the most appropriate to VFAs production.

KEYWORDS:

VFAs; anaerobic digestion; food waste; total solids concentration

PMID:
25666310
DOI:
10.1080/09593330.2015.1015454
[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Taylor & Francis
Loading ...
Support Center