کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4997212 | 1459905 | 2017 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Rapid generation of volatile fatty acids (VFA) through anaerobic acidification of livestock organic waste at low hydraulic residence time (HRT) Rapid generation of volatile fatty acids (VFA) through anaerobic acidification of livestock organic waste at low hydraulic residence time (HRT)](/preview/png/4997212.png)
- Rapid generation of VFA's through acidogenic anaerobic digestion from CM and PL.
- Pre-treatment of CM and PL, optimization of pH, HRT and F/M ratio to maximize VFAs.
- HRT of 4Â days, pH of 5.5, and F/M ratio of 1.0 were found optimum for the process.
- Pre-treated CM and PL yielded 0.43 and 0.67Â kg of VFA/(kg VS reduced) respectively.
The purpose of this study was to investigate the effect of pre-treatment and F/M (Food to Microorganism) ratios for the rapid generation of volatile fatty acids (VFA) from livestock organic wastes (cattle manure (CM) and poultry litter (PL)) through an anaerobic acidification process at a pH range of 4.5-5.5. Experiments were organized using CM and PL in batch reactors (1 L and 25 L) with and with no pre-treatment of substrate at F/M ratios (0.4, 0.6, 0.8 and 1). Among various existing pre-treatments methods, thermal-acidic (120 °C; 1% H2SO4) pre-treatment was found effective. The results revealed that 0.31 and 0.47 kg VFA/(kg VS reduced) could be obtained from CM and PL respectively with no pre-treatment, whereas it improvised to 0.43 and 0.67 kg VFA/(kg VS reduced) correspondingly due to pre-treatment. Aforesaid, better yield of VFA was obtained at F/M ratio of 1.0, pH-5.5 and hydraulic residence time of 4 days.
Acidogenic anaerobic digestion of livestock organic waste for the production of volatile fatty acids at low hydraulic residence time (HRT).76
Journal: Bioresource Technology - Volume 238, August 2017, Pages 188-193