在低水力停留时间 (HRT) 下通过牲畜有机废物的厌氧酸化快速生成挥发性脂肪酸 (VFA)。
Rapid generation of volatile fatty acids (VFA) through anaerobic acidification of livestock organic waste at low hydraulic residence time (HRT).
机构信息
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.
出版信息
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。
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