Bioengineering and Environmental Sciences (BEES), CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad 500007, India; Academy of Scientific and Innovative Research (AcSIR), India.
Bioengineering and Environmental Sciences (BEES), CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad 500007, India.
Bioresour Technol. 2017 Aug;238:188-193. doi: 10.1016/j.biortech.2017.04.005. Epub 2017 Apr 4.
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 (1L and 25L) 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% HSO) pre-treatment was found effective. The results revealed that 0.31 and 0.47kg VFA/(kg VS reduced) could be obtained from CM and PL respectively with no pre-treatment, whereas it improvised to 0.43 and 0.67kg 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 4days.
本研究旨在探讨在 pH 值为 4.5-5.5 的范围内，通过厌氧酸化过程，从牲畜有机废物（牛粪（CM）和家禽粪便（PL））中快速生成挥发性脂肪酸（VFA）的预处理和 F/M（食物与微生物）比例的影响。实验采用 1L 和 25L 的批量反应器，在有和没有底物预处理的情况下，以 F/M 比（0.4、0.6、0.8 和 1）进行。在各种现有的预处理方法中，发现热酸（120°C；1%HSO）预处理是有效的。结果表明，未经预处理，可分别从 CM 和 PL 中获得 0.31 和 0.47kg VFA/（kgVS 减少），而预处理后可相应提高到 0.43 和 0.67kg VFA/（kgVS 减少）。上述结果表明，在 F/M 比为 1.0、pH-5.5 和水力停留时间为 4 天时，可获得更好的 VFA 产量。
